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- Multiple ChoicePlease save your changes before editing any questions.
This type of nuclear reaction occurs on the sun and in stars.
Fission
Fusion
synthesis
decomposition
- Multiple ChoicePlease save your changes before editing any questions.
An electron that is emitted during radioactive decay is aneutrongamma rayalpha particlebeta particle - Multiple ChoicePlease save your changes before editing any questions.
Positively charged particles emitted during radioactive decay that consist of two protons and two neutrons are called
alpha particles
beta particles
gamma rays
neutron emissions
- Multiple ChoicePlease save your changes before editing any questions.Which of the following best describes the process of nuclear fission?Splitting an atom's nucleus apartSeparating an atom's electrons from its nucleusFusing two atomic nuclei togetherSplitting an atom's electrons in half
- Multiple ChoicePlease save your changes before editing any questions.Which of the following is an example of nuclear fusion?A plutonium atom is used to start a chain reaction that detonates a nuclear weaponA uranium atom is split apart into lighter elementsTwo hydrogen atoms are combined to form a helium atomTwo hydrogen atoms bond with an oxygen atom to form a water molecule
- Multiple ChoicePlease save your changes before editing any questions.The least penetrating type of radiationAlpha particleBeta particlegamma ray
- Multiple ChoicePlease save your changes before editing any questions.This type of reaction occurs on the sun and in stars.FissionFusionsynthesisdecomposition
- Multiple ChoicePlease save your changes before editing any questions.What type of decay does not change the element or the mass?AlphaBetaGamma
- Multiple ChoicePlease save your changes before editing any questions.The type of radioactive particle will penetrate farthest into a material is a(n)__________.alphabetagammaall of the above
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The three types of nuclear radiation in order of decreasing penetrating power are
alpha, beta, gamma
alpha, gamma, beta
beta, alpha, gamma
gamma, alpha, beta
- Multiple ChoicePlease save your changes before editing any questions.Matter is anything that takes up spaceTrueFalse
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Matter has two main properties mass and volume
TrueFalse - Multiple ChoicePlease save your changes before editing any questions.Something that takes up space and has mass.volumemattermassdensity
- Multiple ChoicePlease save your changes before editing any questions.What are the three states of matter?solid, volume, massdensity, volume, masssolid, liquid, gasdensity, gas, volume
- Multiple ChoicePlease save your changes before editing any questions.I am two or more atoms chemically bonded.atomcompoundmoleculemixture
- Multiple ChoicePlease save your changes before editing any questions.What is an example of gas?crayonspapersodaair
- Multiple ChoicePlease save your changes before editing any questions.Solids have a definite _______________.smellshapepicturesound
- Multiple ChoicePlease save your changes before editing any questions.Liquid matter takes the shape of _______.a gaswatera petIts container
- Multiple ChoicePlease save your changes before editing any questions.
Vaporization/ evaporation is the change of physical state from _______ to _______.
gas to liquid
liquid to gas
solid to gas
gas to solid
- Multiple ChoicePlease save your changes before editing any questions.Substance with a DEFINITE shape and DEFINITE volume...solidliquidgas
- Multiple ChoicePlease save your changes before editing any questions.Substance with a DEFINITE volume, but NO definite shape...solidliquidgas
- Multiple ChoicePlease save your changes before editing any questions.Substance that fills its container and can "spill" out into more space...solidliquidgas
- Multiple ChoicePlease save your changes before editing any questions.The particles in a solid are...vibrating and closely packed togethervibrating and loosely packed togethernot moving at all
- Multiple ChoicePlease save your changes before editing any questions.Temperature measures...The amount of matter in an object.how fast or slowly molecules are moving.the amount of space an object takes up.
- Multiple ChoicePlease save your changes before editing any questions.What can causes ice to transform from a solid to a liquid?The air.The cold.ShapeHeat
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Matter is anything ______________ and _________________.
blue and yellow
metal and rock
living and non-living
solid and gaseous
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What state of matter has molecules spaced apart from one another and changes its shape depending on its container?
Solid
Liquid
Gas
Water
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What state of matter has molecules that bounce around at high speeds and are not close together?
Solid
Gas
Smoke
Liquid
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When two or more things are mixed together and you can see the different parts or could easily take it apart, it is called a _______________.
Mixture
Solution
Compound
Molecule
- Multiple ChoicePlease save your changes before editing any questions.
Which picture is a mixture?
- Multiple ChoicePlease save your changes before editing any questions.
What process takes place when a gas becomes a liquid? (Think clouds)
Melting
Freezing
Evaporation
Condensation
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Which of the following is a proton?
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Circling the atom, these parts of an atom hold a negative charge.
Neutron
Electron
Proton
Compound
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Compound or Just a Molecule?
Compound
Molecule
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Which of the following determines an object’s ability to float in water?
volume
mass
weight
density
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Why a wet iron pan often gets rusted if left in that state for some time?
Properties such as shape, size, colour and state of a substance are called its physical properties
A change in which a substance undergoes a change in its physical properties is called a physical change.
A wet iron pan (tawa) often gets rusted if left in that state for some time because iron rust in the presence of oxygen and water.
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What are physical properties?
Properties such as size, colour and state of a substance are called its physical properties.
Properties such as shape, size, colour and state of a substance are called its physical properties.
Properties such as shape, size, colour and state of a matter are called its physical properties.
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What is a physical change?
A change in which a substance undergoes a change in its physical properties is called a physical change.
A change in which a substance undergoes a change in its chemical properties is called a physical change.
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What is called a chemical reaction?
A change in which one or more new substances are formed is called a chemical change. A chemical change is also called a chemical reaction.
A change in which two or more new substances are formed is called a chemical change. A chemical change is also called a chemical reaction.
- Multiple ChoicePlease save your changes before editing any questions.
Why a slice of an apple acquires a brown colour if it is not consumed immediately?
A slice of an apple acquires a brown colour if it is not consumed immediately due to the formation of new substances.
A slice of an apple acquires a brown colour if it is not consumed immediately
- Multiple ChoicePlease save your changes before editing any questions.
Why tearing of paper into pieces is a physical change?
Tearing of a paper is a physical change because when the paper is torn only the shape and size of the paper is changed, no new substance is formed.
Tearing of a paper is a physical change because when the paper is torn only the shape and size of the paper does not change and new substance is formed.
- Multiple ChoicePlease save your changes before editing any questions.
Why is spoiling of food a chemical change?whAT IS THE SECOUND SENTANCE
It is a chemical change as it cannot be brought back to its original form.
Spoiling of food is an unwanted quality change in a foodstuff, such as staling, discoloration, the development of off-flavours and odours.
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Why explosion of fireworks is a chemical change?
Explosion of a firework is a chemical change because explosion produces heat, light, sound and unpleasant gases and once the crackers are burnt, it cannot be brought back to its original form.
For rusting, the presence of both oxygen and water (or water vapour) is essential. Painting of an iron gate prevents it from coming in contact with oxygen, or water, or both and thus prevents it from rusting.
- Multiple ChoicePlease save your changes before editing any questions.
Which type of reaction does the diagram illustrate?
Fission
Fusion
Alpha Decay
Beta Decay
- Multiple ChoicePlease save your changes before editing any questions.
What occurs in both fusion and fission reactions?
Small amounts of energy are converted into large amounts of matter.
Small amounts of matter are converted into large amounts of energy.
Heavy nuclei are split into lighter nuclei.
Light nuclei are combined into heavier nuclei.
- Multiple ChoicePlease save your changes before editing any questions.
What is one benefit associated with a nuclear fission reaction?
The products are not radioactive.
Stable isotopes are used as reactants.
There is no chance of biological exposure.
A large amount of energy is produced.
- Multiple ChoicePlease save your changes before editing any questions.
generates radioactive waste
- many steps require fossil fuels (mining and disposal)
- expensive initial investment
- uncertainty of risk
pros of nuclear power
cons of nuclear power
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less of an immediate environmental impact than fossil fuels
- no air pollution
- less disturbing to land than fossil fuels
- extremely efficient
cons of nuclear power
pros of nuclear power