Physical Science

Front

What is the product of the reaction 2H₂ + O₂?

Back

2H₂O

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

According to which law of energy, energy can't be created or destroyed?

Back

Law of conservation of energy

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Front

What are fizzing, foaming, and burning examples of?

Back

Chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas

Tags

NGSS.MS-PS1-2

Front

In a chemical reaction, if you begin with 23 atoms, how many atoms will remain after the reaction?

Back

23

Tags

NGSS.MS-PS1-5

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

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.

Tags

NGSS.MS-PS1-4

Front

What is an example of a chemical reaction?

Back

Rusting of iron.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5