8th Grade Science Review

Front

What happens during an exothermic reaction?

Back

Heat is released and chemical bonds are formed.

Tags

NGSS.HS-PS1-4

Front

What happens during an endothermic reaction?

Back

Heat is absorbed and chemical bonds are broken.

Tags

NGSS.MS-PS1-4

Front

What is a plate boundary?

Back

The place where two tectonic plates meet; most volcanoes and earthquakes occur here.

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS3-2

Front

What type of plate boundary is a convergent boundary?

Back

A boundary where two plates collide, often forming mountains or causing earthquakes.

Tags

NGSS.MS-ESS2-2

Front

What are synthetic materials?

Back

Materials made by humans through chemically changing natural resources.

Tags

NGSS.MS-PS1-3

Front

What is the difference between renewable and nonrenewable resources?

Back

Renewable resources can be replenished naturally, while nonrenewable resources cannot be replaced once used.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.

Tags

NGSS.MS-PS1-5

Front

What is an example of a physical change?

Back

Melting ice is a physical change because it changes state but not composition.

Tags

NGSS.MS-PS1-4

Front

What is an example of a chemical change?

Back

Burning wood is a chemical change because it transforms the material into new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the role of catalysts in chemical reactions?

Back

Catalysts speed up chemical reactions without being consumed in the process.