Science 8 | Chemistry | Unit 9. Material changes Physical and chemical changes

Complete the sentence.
In chemical changes, reactants
with each other to form new substances
Đáp án
In chemical changes, reactants
react
with each other to form new substances
Giải thích

The correct answer
react
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Choose the correct answer.
In chemical changes, reactants can react or
to form new substances

evaporate
combine
change state

Giải thích

The correct answer
combine
evaporate
change state
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Complete the sentence.
The break down of proteins into amino acids is a
change
Đáp án
The break down of proteins into amino acids is a
chemical
change
Giải thích

The correct answer
chemical
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Write the correct answer:
New substances are formed in a
change
Đáp án
New substances are formed in a
chemical
change
Giải thích

The correct answer
chemical
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Write the correct answer:
Some reactant can
apart to form new substances in a chemical reaction
Đáp án
Some reactant can
break
apart to form new substances in a chemical reaction
Giải thích

The correct answer
break
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No new
are formed in a physical change

color
smell
substance
shape

Giải thích

The correct answer
substance
color
smell
shape

1/1
Choose the correct answer.
Water in its liquid state can be evaporated to become

colorless
solid
plasma
gas

Giải thích

The correct answer
gas
colorless
solid
plasma

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Choose the correct answer.
Milk is not (a)
.

drink
opaque
liquid
solution

Giải thích

The correct answer
solution
opaque
liquid
drink

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A change in state is a
change

chemical
physical
shape
color

Giải thích

The correct answer
physical
chemical
shape
color

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Choose the correct answer.
Chemical changes can happen in all
organisms

death
living
wild
dangerous

Giải thích

The correct answer
living
dangerous
wild
death

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