Unit 4- Changes in Matter 8th Grade Review-2024

Front

What is a pure substance?

Back

A pure substance is made up of one type of particle, such as an element or compound.

Front

Which item is an example of a pure substance?

Back

Water is an example of a pure substance.

Front

What is the main difference between mixtures and pure substances?

Back

Mixtures can be physically separated, while pure substances cannot be physically separated.

Front

What does the Law of Conservation of Mass state during a chemical change?

Back

Matter is transformed during a chemical change.

Tags

NGSS.MS-PS1-5

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Front

What happens to matter in a physical change?

Back

In a physical change, matter changes its form but not its chemical composition.

Front

What is a mixture?

Back

A mixture is made up of two or more substances that are physically combined.

Front

How can you identify a single element in a mixture?

Back

A single element can be identified if it is represented by a unique symbol on the periodic table.

Front

What is the significance of conducting controlled experiments?

Back

Controlled experiments help to isolate variables and determine cause-and-effect relationships.

Tags

NGSS.MS-PS2-2

Front

What should be done before concluding a hypothesis is supported?

Back

Several controlled experiments should be conducted to obtain consistent results that support the hypothesis.

Tags

NGSS.MS-PS2-2