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SUPER
Science
10th
grade
CBSE Class 10 Science Sample Paper 01 (2020-2021)_2
76 questions
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- 1. Multiple Choice
Looking at the field lines in this picture, these two magnets are ________
Attracting
Repelling
Attracting and Repelling
Doing nothing
- 2. Multiple Choice
answer the following: The magnetic field lines emerge from north pole and merge at the south pole
True
False
- 3. Multiple Choice
A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross-section of the filament in 16 seconds would be roughly. (Please practice the given numerical in your notebook)
- 4. Multiple Choice
When two ends of a metallic wire are connected across the terminals of a cell, some potential difference is set up between its ends. In which direction, electrons are flowing through the conductors?
In a circular motionFrom positive to negativeFrom left to rightFrom negative to positive
Direction of flow of electron: From a lower potential end of a metallic conductor to its higher potential end.
- 5. Fill in the Blank
The process by which carbohydrates are synthesized by plants from carbon dioxide and ` water with help of chlorophyll and light.
- 6. Multiple Choice
Write one function of valves in the walls of veins. What is the first statement of the audio clip?
Unlike arteries, veins contain valves that ensure blood flows in only one direction.
But, Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.
Valves also help blood travel back to the heart against the force of gravity.
- 7. Multiple Choice
Write one function of valves in the walls of veins. What is the Second statement of the audio clip?
Unlike arteries, veins contain valves that ensure blood flows in only one direction.
But, Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.
Valves also help blood travel back to the heart against the force of gravity.
- 8. Multiple Choice
Write one function of valves in the walls of veins. What is the Third statement of the audio clip?
Unlike arteries, veins contain valves that ensure blood flows in only one direction.
But, Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.
Valves also help blood travel back to the heart against the force of gravity.
- 9. Multiple Choice
Components of Ecosystem. What is the first statement of the audio clip?
Biotic components are the living things that have a direct or indirect influence on other organisms in an environment.
For example plants, animals, and microorganisms and their waste materials.
Abiotic components of an ecosystem include all chemical and physical elements i.e. non-living components.
They mainly take up the role of life supporter.
They determine and restrict the population growth, number, and diversity of biotic factors in an ecosystem. Hence, they are called limiting factors.
- 10. Multiple Choice
Components of Ecosystem. What is the Second statement of the audio clip?
A terrestrial ecosystem consists of abiotic factors like climate, type of soil or rock, altitude, temperature, nutrients, and minerals,
For example plants, animals, and microorganisms and their waste materials.
Abiotic components of an ecosystem include all chemical and physical elements i.e. non-living components.
They mainly take up the role of life supporter.
They determine and restrict the population growth, number, and diversity of biotic factors in an ecosystem. Hence, they are called limiting factors.
- 11. Multiple Choice
Components of Ecosystem. What is the Third statement of the audio clip?
A terrestrial ecosystem consists of abiotic factors like climate, type of soil or rock, altitude, temperature, nutrients, and minerals,
whereas abiotic components in an aquatic ecosystem include dissolved gases, depth of water, salinity, pH of water, light intensity etc.
Abiotic components of an ecosystem include all chemical and physical elements i.e. non-living components.
They mainly take up the role of life supporter.
They determine and restrict the population growth, number, and diversity of biotic factors in an ecosystem. Hence, they are called limiting factors.
- 12. Multiple Choice
Components of Ecosystem. What is the Fourth statement of the audio clip?
A terrestrial ecosystem consists of abiotic factors like climate, type of soil or rock, altitude, temperature, nutrients, and minerals,
whereas abiotic components in an aquatic ecosystem include dissolved gases, depth of water, salinity, pH of water, light intensity etc.
Abiotic components of an ecosystem include all chemical and physical elements i.e. non-living components.
They mainly take up the role of life supporter.
They determine and restrict the population growth, number, and diversity of biotic factors in an ecosystem. Hence, they are called limiting factors.
- 13. Multiple Choice
Components of Ecosystem. What is the Fifth statement of the audio clip?
A terrestrial ecosystem consists of abiotic factors like climate, type of soil or rock, altitude, temperature, nutrients, and minerals,
whereas abiotic components in an aquatic ecosystem include dissolved gases, depth of water, salinity, pH of water, light intensity etc.
Abiotic components of an ecosystem include all chemical and physical elements i.e. non-living components.
They mainly take up the role of life supporter.
They determine and restrict the population growth, number, and diversity of biotic factors in an ecosystem. Hence, they are called limiting factors.
- 14. Multiple Choice
Components of Ecosystem. What is the Sixth statement of the audio clip?
A terrestrial ecosystem consists of abiotic factors like climate, type of soil or rock, altitude, temperature, nutrients, and minerals,
whereas abiotic components in an aquatic ecosystem include dissolved gases, depth of water, salinity, pH of water, light intensity etc.
Abiotic components of an ecosystem include all chemical and physical elements i.e. non-living components.
They mainly take up the role of life supporter.
They determine and restrict the population growth, number, and diversity of biotic factors in an ecosystem. Hence, they are called limiting factors.
- 15. Multiple Choice
Components of Ecosystem. What is the Seventh statement of the audio clip?
A terrestrial ecosystem consists of abiotic factors like climate, type of soil or rock, altitude, temperature, nutrients, and minerals,
whereas abiotic components in an aquatic ecosystem include dissolved gases, depth of water, salinity, pH of water, light intensity etc.
Abiotic components of an ecosystem include all chemical and physical elements i.e. non-living components.
They mainly take up the role of life supporter.
They determine and restrict the population growth, number, and diversity of biotic factors in an ecosystem. Hence, they are called limiting factors.
- 16. Multiple Choice
Various steps in a food chain are known as trophic levels
The first trophic level is of producers.
The second trophic level is of primary consumers also known as herbivores,
third of carnivores, or secondary consumers,
fourth is of tertiary consumers also known as top carnivores.
- 17. Multiple Choice
Various steps in a food chain are known as trophic levels
The first trophic level is of producers.
The second trophic level is of primary consumers also known as herbivores,
third of carnivores, or secondary consumers,
fourth is of tertiary consumers also known as top carnivores.
- 18. Multiple Choice
Various steps in a food chain are known as trophic levels
The first trophic level is of producers.
The second trophic level is of primary consumers also known as herbivores,
third of carnivores, or secondary consumers,
fourth is of tertiary consumers also known as top carnivores.
- 19. Multiple Choice
Various steps in a food chain are known as trophic levels
The first trophic level is of producers.
The second trophic level is of primary consumers also known as herbivores,
third of carnivores, or secondary consumers,
fourth is of tertiary consumers also known as top carnivores.
- 20. Multiple Choice
Various steps in a food chain are known as trophic levels
The first trophic level is of producers.
The second trophic level is of primary consumers also known as herbivores,
third of carnivores, or secondary consumers,
fourth is of tertiary consumers also known as top carnivores.
- 21. Multiple Choice
Assertion: Photosynthesis is considered as an endothermic reaction.
Reason: Energy gets released in the process of photosynthesis.
Both assertion and reason are CORRECT and the reason is the CORRECT explanation of the assertion.
Both assertion and reason are CORRECT but, reason is NOT THE CORRECT explanation of the assertion.
Assertion is CORRECT but, reason is INCORRECT.
Assertion is INCORRECT but, reason is CORRECT.
- 22. Multiple Choice
Assertion (A): Man is an omnivore.
Reason (R): Man eats food products obtained from both plants and animals.
Both A and R are true and R is the correct explanation of the assertion.
Both A and R are true but R is not the correct explanation of of the assertion
A is true but R is false.
A is false but R is true.
- 23. Multiple Choice
Assertion: Bile is essential for the digestion of lipids.
Reason: Bile juice contains bile salts which helps in lipid degradation.
Bile is essential for the digestion of lipids.
Both assertion and reason are CORRECT and the reason is the CORRECT explanation of the assertion.
Both assertion and reason are CORRECT but, reason is NOT THE CORRECT explanation of the assertion.
Assertion is CORRECT but, reason is INCORRECT.
Assertion is INCORRECT but, reason is CORRECT.
- 24. Multiple Choice
(A) Variations are seen in offspring produced by a sexual reproduction
(R) DNA molecule generated by replication is not exactly identical to original DNA.
Both assertion and reason are CORRECT and the reason is the CORRECT explanation of the assertion.
Both assertion and reason are CORRECT but, reason is NOT THE CORRECT explanation of the assertion.
Assertion is CORRECT but, reason is INCORRECT.
Assertion is INCORRECT but, reason is CORRECT.
- 25. Multiple Choice
Sanjay studied about blood circulation in humans. He wanted to observe the flow of blood and was about to cut his finger a bit. He suddenly realized that this could be fatal. f
What is the correct route for blood flow in a human?
left auricle →→ left ventricle →→ lungs →→ right ventricle →→ right auricle
left auricle →→ left ventricle →→ right ventricle →→ right auricle →→ lungs
right auricle →→ right ventricle →→ left ventricle →→ left auricle →→ lungs
right auricle →→ right ventricle →→ lungs →→ left auricle →→ left ventricle
- 26. Multiple Choice
he diagram shows the vertical section through the heart: What are the functions of the numbered blood vessels 1 ?
Carries blood to the body
Carries blood to the Lungs
Carries blood from the lungs
carries blood from the body
- 27. Multiple Choice
he diagram shows the vertical section through the heart: What are the functions of the numbered blood vessels 2 ?
Carries blood to the body
Carries blood to the Lungs
Carries blood from the lungs
carries blood from the body
- 28. Multiple Choice
he diagram shows the vertical section through the heart: What are the functions of the numbered blood vessels 3 ?
Carries blood to the body
Carries blood to the Lungs
Carries blood from the lungs
carries blood from the body
- 29. Multiple Choice
he diagram shows the vertical section through the heart: What are the functions of the numbered blood vessels 4 ?
Carries blood to the body
Carries blood to the Lungs
Carries blood from the lungs
carries blood from the body
- 30. Multiple Choice
The table shows the characteristics of blood in one blood vessel of the body.
Which blood vessel contains blood with these characteristics?
Aorta
Pulmonary artery
Pulmonary vein
Vena cava
- 31. Multiple Choice
The colour of blood is red due to the presence of
Hemocyanin
Haemoglobin
Chlorophyll
Xanthophyll
- 32. Multiple Choice
Which of the following chambers of the human heart contain oxygenated blood?
Left auricle and left ventricle
Left auricle and right ventricle
Right auricle and left ventricle
Right auricle and right ventricle
- 33. Multiple Choice
Read the following and answer any four questions:Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salts bed of rack salt were formed when seas of bygone ages dried up. The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, bleaching powder.
Which of the following does not form an acidic salt?
Phosphoric acid
Carbonic acid
Hydrochloric acid
Sulphuric acid
- 34. Multiple Choice
Read the following and answer any four questions:Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salts bed of rack salt were formed when seas of bygone ages dried up. The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, bleaching powder.
Which of the following salts has no water of crystallization?
Blue vitriol
Washing soda
Baking soda
Gypsum
- 35. Multiple Choice
Read the following and answer any four questions:Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salts bed of rack salt were formed when seas of bygone ages dried up. The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, bleaching powder.
The formula of baking soda is?
K2CO
KHCO3
NaHCO3
Na2CO3
- 36. Multiple Choice
Read the following and answer any four questions:Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloride and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salts bed of rack salt were formed when seas of bygone ages dried up. The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, bleaching powder.
Which of the following salt is used for removing the permanent hardness of water
Blue vitriol
Washing soda
Baking soda
Gypsum
- Comprehension for next 15 questions
Understanding Stomata: The Tiny Pores in Leaves/ Components of a leaf
This video explains the structure and function of stomata, which are tiny pores in the leaves of plants.
Structure:
The outermost layer of a leaf is the waxy cuticle, followed by the upper epidermis, palisade cells, spongy tissue, and the lower epidermis.
Stomata are mainly located in the lower epidermis and are surrounded by two specialized guard cells.
Function:
Stomata regulate the exchange of gases between the leaf and the atmosphere.
During the day, they open to allow carbon dioxide to enter for photosynthesis and oxygen to exit.
At night, they close to conserve water.
Regulation of Stomata Opening and Closing:
Several factors influence the opening and closing of stomata:
Biological rhythm: Stomata have an internal rhythm and open and close on a 24-hour cycle even in constant light.
Light intensity: Light triggers stomata to open, with a minimum light level required for most plants.
Carbon dioxide concentration: Low CO2 levels cause stomata to open, while high CO2 levels cause them to close.
Water balance: Wilting plants close their stomata to conserve water.
In summary, stomata are essential for gas exchange in plants. They open and close in response to various factors, allowing plants to take in carbon dioxide for photosynthesis, release oxygen, and regulate water loss.
37. Multiple Choice30 seconds1 ptWhat is the main function of stomata in leaves?
Regulate gas exchange
Absorb sunlight
Store water
Produce oxygen
38. Multiple Choice30 seconds1 ptWhat are some factors that influence stomata opening and closing?
Temperature and humidity
Light intensity and water balance
Carbon dioxide concentration and biological rhythm
Nutrient availability and wind speed
39. Multiple Choice30 seconds1 ptWhat is the internal rhythm of stomata that causes them to open and close on a 24-hour cycle?
Temperature changes
Nutrient availability
Light intensity
Constant light
40. Fill in the Blank30 seconds1 ptWilting plants close their stomata to conserve ___
41. Fill in the Blank30 seconds1 ptLight triggers stomata to open, with a minimum light level required for most plants.
42. Multiple Choice30 seconds1 ptWhat are stomata?
Tiny pores in the leaves of plants surrounded by two specialized guard cells
Roots of plants
Flowers of plants
Stems of plants
43. Fill in the Blank30 seconds1 ptLow CO2 levels cause stomata to ___
44. Multiple Choice30 seconds1 ptWhere are stomata mainly located in a leaf?
Leaf veinsInside the leafTop of the leafUnderside of the leaf/ Lower epidermis
45. Multiple Choice30 seconds1 ptWhat surrounds stomata in the leaf?
Pollen grainsXylem cellsEpidermis cellsGuard cells46. Multiple Choice30 seconds1 ptWhat is the function of stomata?
Seed dispersalPhotosynthesisWater absorptionGas exchange47. Multiple Choice30 seconds1 ptWhen do stomata open during the day?
Stomata open during the nightStomata open only during rainfallStomata open during the day to allow for gas exchange and photosynthesis to occur.Stomata open randomly throughout the day48. Multiple Choice30 seconds1 ptWhat triggers stomata to open?
High levels of oxygenLight, low levels of carbon dioxide, and high levels of humidityLow levels of humidityLow levels of light49. Multiple Choice30 seconds1 ptWhat happens to stomata in wilting plants?
Stomata closeStomata multiplyStomata disappearStomata open50. Multiple Choice30 seconds1 ptWhat influences the opening and closing of stomata?
Temperature, wind speed, and soil pHWater availability, plant height, and leaf colorRoot depth, air pressure, and soil salinityLight intensity, carbon dioxide levels, humidity, and plant hormones51. Multiple Choice30 seconds1 ptWhat is the primary gas exchange function of stomata?
Stomata provide structural support to plant leavesStomata absorb sunlight for photosynthesisFacilitate gas exchange by allowing the intake of CO2 and release of O2 and H2O.Stomata regulate water balance in plants - Comprehension for next 25 questions
Chemosynthesis vs. Photosynthesis: Key Differences This video explores the key differences between chemosynthesis and photosynthesis, two vital processes that sustain life on Earth. Key Distinction: Light Source One crucial difference lies in the use of sunlight. Photosynthesis occurs in the presence of sunlight, while chemosynthesis takes place in darkness, primarily at the ocean floor near hydrothermal vents. Chemical Reactions: Similarities and Differences Both processes involve a series of chemical reactions that generate energy, but they differ in their specific mechanisms. Photosynthesis: Light energy is used to convert carbon dioxide and water into glucose sugar. This process releases oxygen as a byproduct. Chemosynthesis: Bacteria derive energy by oxidizing organic compounds, such as hydrogen sulfide. This energy is then used to combine carbon dioxide and water to produce sugar. Location and Extremophiles Photosynthesis: Primarily occurs above sea level in plants, although it can also happen in deep-sea plants up to 100 meters down. Leaves are the main site for photosynthesis. Chemosynthesis: Occurs thousands of meters deep in the ocean near hydrothermal vents rich in hydrogen sulfide. These extreme environments and high water pressure are where chemosynthesis thrives. Energy Source and Dependence Photosynthesis: Relies on sunlight and therefore doesn't happen at night. Chemosynthesis: Doesn't require any light source. Energy is derived from the oxidation of inorganic compounds. Impact on Life Photosynthetic organisms: Plants, algae, and bacteria play a critical role in capturing energy and releasing oxygen for life on Earth. Chemosynthetic organisms: Deep-sea creatures like shrimp, crabs, fish, and giant tube worms depend on chemosynthesis for survival in the darkest parts of the ocean. Over 300 species of marine life thrive near these hydrothermal vents. Symbiotic bacteria residing within these creatures oxidize hydrogen sulfide for energy. Rates and Byproducts Photosynthesis: The rate is influenced by factors like temperature, sunlight intensity, and carbon dioxide concentration. Chemosynthesis: The rate depends on the amount of hydrogen sulfide seeping from the vents. Byproducts: Photosynthesis releases oxygen, while chemosynthesis produces sulfur compounds as a byproduct. Similarities: Energy Production and Sugar Formation Despite their differences, both chemosynthesis and photosynthesis share some key similarities. They both: Use different energy sources to produce glucose sugar, which serves as fuel for both plants and animals. Utilize inorganic substances to obtain energy and produce organic matter.
59. Multiple Choice30 seconds1 ptWhere does photosynthesis primarily occur?
Deep in the ocean near hydrothermal vents
Above sea level in plants
Underground in caves
In the atmosphere
60. Multiple Choice30 seconds1 ptWhat factor influences the rate of chemosynthesis?
Temperature
Sunlight intensity
Amount of hydrogen sulfide seeping from vents
Carbon dioxide concentration
61. Multiple Choice30 seconds1 ptWhat do both chemosynthesis and photosynthesis produce as fuel?
Proteins
Lipids
Glucose sugar
Nucleic acids
62. Multiple Choice30 seconds1 ptWhat is the primary difference between photosynthesis and chemosynthesis?
Photosynthesis uses light energy, while chemosynthesis involves bacteria oxidizing organic compounds.
Photosynthesis releases oxygen, while chemosynthesis releases glucose sugar.
Photosynthesis involves bacteria, while chemosynthesis uses light energy.
Photosynthesis produces water, while chemosynthesis produces carbon dioxide.
63. Multiple Choice30 seconds1 ptWhich process relies on sunlight for energy?
Photosynthesis
Chemosynthesis
Fermentation
64. Multiple Choice30 seconds1 ptWhere does photosynthesis occur?
In the presence of sunlight
In darkness near hydrothermal vents
In the absence of sunlight
In the deep sea
65. Multiple Choice30 seconds1 ptWhat do photosynthetic organisms release for life on Earth?
Carbon dioxide
Nitrogen
Oxygen
Hydrogen
52. Multiple Choice30 seconds1 ptWhat is involved in chemosynthesis?
Bacteria oxidizing inorganic compounds
Plants converting sunlight into energy
Animals consuming organic matter
Fungi breaking down dead organisms
53. Multiple Choice30 seconds1 ptWhere does chemosynthesis occur?
Near hydrothermal vents
In sunlight
In darkness
In the ocean
54. Multiple Choice30 seconds1 ptWhat does photosynthesis use light energy to convert carbon dioxide and water into?
Oxygen and water
Glucose and oxygen
Carbon dioxide and water
Glucose and carbon dioxide
55. Multiple Choice30 seconds1 ptWhich type of synthesis relies on sunlight?
Photosynthesis
Chemosynthesis
Both
Neither
56. Multiple Choice30 seconds1 ptWhat do photosynthetic organisms release, while chemosynthetic organisms depend on chemosynthesis for survival?
Carbon dioxide
Nitrogen
Oxygen
Hydrogen sulfide
57. Multiple Choice30 seconds1 ptWhat do both processes produce using different energy sources and inorganic substances?
Proteins
Glucose sugar
Lipids
Vitamins
58. Multiple Choice30 seconds1 ptWhere does photosynthesis primarily occur?
Deep in the ocean
Above sea level
Underground
In the desert
66. Multiple Choice30 seconds1 ptWhat are the two distinct mechanisms crucial for sustaining life on Earth?
Fermentation and combustionTranspiration and excretionOxidation and reductionPhotosynthesis and Chemosynthesis
67. Multiple Choice30 seconds1 ptHow do Chemosynthesis and photosynthesis differ?
Chemosynthesis uses light energy, while photosynthesis uses inorganic compounds as an energy source.Chemosynthesis uses inorganic compounds as an energy source, while photosynthesis uses light energy.Chemosynthesis and photosynthesis both use inorganic compounds as their energy source.Chemosynthesis and photosynthesis both use light energy as their energy source.68. Multiple Choice30 seconds1 ptWhere does photosynthesis primarily occur?
a) Deep in the ocean
b) Near hydrothermal vents
c) In the leaves of plants
d) In the roots of plants
69. Multiple Choice30 seconds1 ptWhat is the primary energy source for photosynthesis?
WindCoalSunlightWater70. Multiple Choice30 seconds1 ptWhat is the primary energy source for chemosynthesis?
Organic compoundsSunlightWind energyInorganic compounds71. Multiple Choice30 seconds1 ptWhat is the byproduct of both chemosynthesis and photosynthesis?
carbon dioxideoxygenwaterglucose72. Multiple Choice30 seconds1 ptWhat influences the rate of photosynthesis?
Moon phase, altitude, and cloud coverWind speed, soil pH, and humidityLight intensity, carbon dioxide concentration, temperature, and water availabilityNoise level, air pressure, and precipitation73. Multiple Choice30 seconds1 ptWhere does synthesis primarily occur?
cytoplasmnucleusmitochondriavacuole74. Multiple Choice30 seconds1 ptWhat is one crucial difference between chemosynthesis and photosynthesis?
The crucial difference is the source of energy: chemicals for chemosynthesis and sunlight for photosynthesis.The crucial difference is the speed: chemosynthesis is faster than photosynthesis.The crucial difference is the end product: chemosynthesis produces oxygen and photosynthesis produces carbon dioxide.The crucial difference is the location: chemosynthesis occurs in plants and photosynthesis in animals.75. Multiple Choice30 seconds1 ptWhat is the primary energy source for photosynthesis?
FireWindWaterSunlight76. Multiple Choice30 seconds1 ptWhat do chemosynthetic organisms depend on for survival in the ocean?
Hydrogen sulfide
SoilWindSunlight - Answer choicesTagsAnswer choicesTags