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Science
7th
grade
Photosynthesis & Energy Flow through Living Systems
20 questions
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- 1. Multiple Choice
In photosynthesis, plants convert what type of energy into what other type of energy?
A. Light energy into mechanical energy
B. Radiant energy into chemical energy
C. Chemical energy into heat energy
D. Mechanical energy into light energy
- 2. Multiple Choice
The energy plants gain through photosynthesis is stored in–
A. oxygen.
B. nitrogen.
C. carbon dioxide.
D. glucose.
- 3. Multiple Choice
A test tube is filled with water and a green plant called elodea. When the plant is exposed to sunlight, it begins to produce bubbles. Which of the following is the most likely conclusion for the identity of the gas in the bubbles?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen
- 4. Multiple Choice
The diagram provided illustrates the process of photosynthesis, including the substances used by and produced by plants. What is the identity of the chemical represented by the question mark in the diagram?
A. Hydrogen
B. Carbon
C. Glucose
D. Nitrogen
- 5. Multiple Choice
Which of the following provides the energy needed for photosynthesis?
A. Water
B. Sunlight
C. Plants
D. Atoms
- 6. Multiple Choice
The chart lists organisms in 5 different categories living near the Texas Gulf Coast.
(Look at your chart)
Based on the chart which food chain best models a flow of energy in this ecosystem?
A. Sun - Mosquitos - Shrimp - Coyotes
B. Sun - Algae - Shrimp - Red Drum
C. Sun - Pygmy sunfish - Shrimp - Wood ducks
D. Sun - Willow Oaks - Algae - River otters
- 7. Multiple Choice
A partial grassland food web is shown.
(look at your food web)
Which of the following best describes a relationship in this grassland?
A. Badgers are top predators because they eat upland sandpipers and beetles.
B. A producer-consumer relationship exists between lupines and ants.
C. A predator-prey relationship exists between beetles and ground squirrels.
D. Upland sandpipers are primary and secondary consumers because they eat grasses and grasshoppers.
- 8. Multiple Choice
An Energy pyramid is shown.
(look at your energy pyramid picture)
Which sentence best describes how energy flows through this pyramid?
A. Energy is transferred down each level of the energy pyramid.
B. The energy lost at each level is consumed by organisms in the top level.
C. Energy is transferred from organisms in one level to those in the level above.
D. The organisms at the bottom level provide energy directly to organisms in all the other levels.
- 9. Multiple Choice
A partial mountain forest food web is shown in the picture.
(Look at the picture)
Which statement does not describe a relationship shown in the food web?
A. Elk are prey for mountain lions.
B. Mice are herbivores that consume grasses and are preyed on by snakes.
C. Owls prey on rabbits and frogs.
D. Rabbits consumer shrubs and are parasites of grasses.
- 10. Multiple Choice
A partial marine food web is shown.
(Look at your picture)
Which organisms all consume the same producer?
A. Crabs, pilchards, blennies
B. Euphausiids, sweeps, water fleas
C. Tiger sharks, dolphins, octopuses
D. Sea urchins, crabs, octopuses
- 11. Multiple Choice
A partial food web is shown. The number in the boxes represent animals in the food web.
(Look at your picture)
Which organisms have three carnivorous predators and a consumer - producer relationship with at least one organism?
A. The organisms that fit in boxes 2, 3, 7.
B. The organisms that fit in boxes 5 and 7.
C. The organisms that fit in boxes 4 and 6.
D. The organisms that fit in boxes 2 and 7 only.
- 12. Multiple Choice
A student researching a northern forest ecosystem learns the following information about feeding relationships in the ecosystem.
(Look at your picture)
Which food web best represents the flow of energy in these feeding relationships?
- 13. Multiple Choice
Many Texas caves provide a habitat for animals that live in total darkness. The caves are damp and cool, and most of the caves are rich in mineral calcite.
(Look at your picture)
The diagram shows the relationships of some organisms involved in a cave ecosystem.
Based on the diagram, which of the following statements is valid?
A. Owls are predators of bats, and bats are predators of moths.
B. Beetles compete with bats and cave spiders.
C. Snakes prey on bats and owls.
D. None of the above.
- 14. Multiple Choice
The partial food web is showing an aquatic environment. This type of environment has many organisms in the same trophic levels.
(Look at the picture)
Which two types of organisms in this aquatic food web have a producer - consumer relationship?
A. Microscopic algae and white suckers
B. Small invertebrates and amphipods
C. Phytoplankton and mummichogs
D. Amphipods and channel catfish
- 15. Multiple Choice
Some students are studying the relationships between organisms in a food web.
(Look at your picture)
How many predators shown in this food web are omnivores?
A. 1
B. 2
C. 3
D. 4
- 16. Multiple Choice
Which of these correctly describes a relationship between organisms in the soil food web below?
A. Protozoa gets nutrients from small arthropods.
B. Mammals are predators of birds.
C. Nematodes prey on arthropods.
D. Bacteria get nutrients from organic matter.
- 17. Multiple Choice
The flow of energy in some Australian food chains is modeled in the energy pyramid below.
(Look at your picture)
Based on the model, which consumers would receive the greatest amount of energy captured by the producers in their food chains?
A. Wedge-Tailed eagles
B. Chuditch
C. Ring-Tailed opossums
D. Eucalyptus trees
- 18. Multiple Choice
In the aquatic food web shown, which two organisms have a predator-prey relationship?
A. Shad and sturgeons
B. Sturgeons and blue crabs
C. Blue crabs and rangia clams
D. Copepods amphipods
- 19. Multiple Choice
The African Savanna is a grassland scattered with shrubs and small trees. Some of the organisms that live in the savanna are shown in the picture.
(Look at your picture)
Which two types of organisms have a producer-consumer relationship in this African Savanna?
A. Zebras and hyenas
B. Hyenas and cheetahs
C. Trees and elephants
D. Fungi and dung beetles
- 20. Multiple Choice
How many organisms in this food wen eat only producers?
(Look at your picture)
A. 1
B. 2
C. 3
D. 4
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