Questão 1
Questão
Another name for a chemical change is a _____________.
Responda
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physical change
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chemical reaction
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chemistry
Questão 2
Questão
Mixing ingredients such as flour, water, sugar, and eggs is an example of a _______________ change.
Responda
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physical
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chemical
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compound
Questão 3
Questão
An [blank_start]alloy[blank_end] formed from a mixture of at least one metal and another substance (Ex. iron and copper).
Questão 4
Questão
Burning a piece of wood is an example of a chemical change.
Questão 5
Questão
Knitting yarn into socks is an example of a chemical change.
Questão 6
Questão
The three states of matter are:
Questão 7
Questão
The more energy (heat) the [blank_start]faster[blank_end] the particles move.
Questão 8
Questão
What are two processes that can change a liquid into a gas?
Questão 9
Questão
What are two processes that are used to separate a salt water solution?
Questão 10
Questão
_______ is the separation of a liquid from solid by changing the liquid into a gas and then condensing back into a liquid.
Responda
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Distillation
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Evaporation
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Condensation
Questão 11
Questão
What is formed when a chemical reaction happens between iron and oxygen, forming a new substance?
Questão 12
Questão
Cutting, folding or cutting are all examples of physical changes.
Questão 13
Questão
Adding heat (energy) to a substance will case the particles to move slower.
Questão 14
Questão
A physical combination of two or more kinds of matter is a _________.
Responda
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physical change
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mixture
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change of state
Questão 15
Questão
All chemical reactions either give off [blank_start]energy[blank_end] or use [blank_start]energy[blank_end].
Responda
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energy
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evaporation
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mixtures
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energy
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mixtures
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particles
Questão 16
Questão
A change of state does not affect an object's ______ because the particles are moving closer together or farther apart.
Responda
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mixture
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identity
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temperature
Questão 17
Questão
When liquids are cooled (except water), its particles become farther apart.
Questão 18
Questão
Settling, filtration and magnets are all ways of separating a _________.
Responda
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physical change
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solution
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mixture
Questão 19
Questão
A change in temperature can cause water to change from one state to another.
Questão 20
Questão
During the _______ process, a liquid becomes a gas and is not changed back into a liquid.
Responda
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evaporation
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distillation
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boiling
Questão 21
Questão
[blank_start]Mixtures[blank_end] is a physical combination of two or more kinds of matter.
Responda
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Filtration
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Mixtures
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Physical change
Questão 22
Questão
A [blank_start]solution[blank_end] is a mixture in which two or more substances are blended completely.
Responda
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solution
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chemical change
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filtration
Questão 23
Questão
[blank_start]Chemical properties[blank_end] only change during chemical reactions.
Responda
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Change of state
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Mixtures
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Chemical properties
Questão 24
Questão
An [blank_start]alloy[blank_end] is a solution in which at least one of the substances is a metal.
Questão 25
Questão
When differences in densities cause the parts of a mixture to separate.
Responda
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evaporation
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settling
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chemical change
Questão 26
Questão
Separates things by size
Responda
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Filter
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solution
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distillation
Questão 27
Questão
Separates a solid from a liquid
Responda
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Evaporation
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Settling
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Filtration
Questão 28
Questão
A solution heated until the liquid becomes a gas and the solid is left behind.
Responda
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chemical change
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distillation
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filtration
Questão 29
Questão
[blank_start]Tarnish[blank_end] forms when silver reacts with sulfur in the air.
Questão 30
Questão
A [blank_start]Chemical Change[blank_end] begins with one kind of matter and ends with another.
Responda
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Chemical Change
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Physical Change
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Change of State
Questão 31
Questão
[blank_start]Rust[blank_end] is a solid, brown material that forms when iron gets wet and reacts with oxygen.
Questão 32
Questão
The change of a liquid to a gas without boiling is called _________.
Responda
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melting
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evaporation
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settling
Questão 33
Questão
Rapid change of state from a liquid to a gas is called [blank_start]boiling[blank_end].
Responda
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boiling
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evaporation
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change of state
Questão 34
Questão
A change of state from a solid to a liquid is called [blank_start]melting[blank_end].
Questão 35
Questão
[blank_start]Change of State[blank_end] is a physical change in which one state of matter turns into another.
Responda
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Change of State
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Chemical Change
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Physical Properties
Questão 36
Questão
[blank_start]Steam[blank_end] is water in the form of a gas.
Responda
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Steam
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Boiling
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Evaporation
Questão 37
Questão
___________ begins and ends with the same type of matter.
Responda
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Change of State
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Physical Change
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Chemical Change