What is a chemical change?

When two or more substances combine to make a new chemical substance

When two or more substances combine to make a greater one

When coffee is poured into a cup of ice, the ice begins to melt and mix with the coffee. Which statement best describes this change?

The ice melting is a physical change because the water may be frozen again.

The ice melting is a chemical change because the water changes form.

The water and coffee mixing is a chemical change because the liquids change color.

The water and coffee mixing is a physical change because the mixture forms bubbles.

Cutting a tree limb into logs is (a)____________ and burning them in the fireplace is (b)____________.

(a) A Physical Change (b) A Chemical Change

(a) A Physical Change (b) Also a Physical Change

(a) A Chemical Change (b) Also a Chemical Change

(a) A Chemical Change (b) A Physical Change

When lithium metal is dropped into a container of water, the lithium sparks and fizzes and the water begins to bubble violently. The conclusion that can be drawn from that is:

A new substance is created because this is a chemical change.

No new substances are created because there is a chemical change.

No new substances are created because this is a physical change.

A new substance is created because this is a physical change.

Which of the following is a chemical change?

Mixing two clear liquids and forming a blue liquid

Mixing a clear liquid and white solid and getting a clear liquid

Mixing a clear liquid and a dark purple solid and getting a light purple liquid

Mixing a clear liquid with a white solid and getting a cloudy white liquid

Which process is a sign of a chemical change?

A rotting potato gives off a bad smell

A melting block of ice leaves a large puddle

A cloud quickly changes shape when blown by wind

A plaster statue breaks when it falls onto the floor

The substance that is dissolved into the solution.

The substance that does the dissolving in a solution.

The mixing of different substances.

The process in which neutral molecules lose or gain electrons

Y8 Chemistry chemical and physical changes

Authored by Rachael Flutter

Chemistry, Science

8th Grade

NGSS covered

Used 69+ times

Y8 Chemistry chemical and physical changes

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MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Contains components that are not chemically combined

Element

Compound

Mixture

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Cannot be broken down

Element

Compound

Mixture

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Two or more elements chemically combined

Element

Compound

Mixture

Can be separated easily

Element

Compound

Mixture

MULTIPLE CHOICE QUESTION

30 sec • 10 pts

Has a formula

Element

Compound

Mixture

Has a symbol

Element

Compound

Mixture

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

What does this picture represent?

Element

Compound

Mixture

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