Evidence of Chemical Reactions/density review

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

Which of the following is NOT a chemical change?

Back

Melting ice is a physical change, not a chemical change.

Tags

NGSS.MS-PS1-4

Front

What is evidence of a chemical reaction?

Back

Evidence of a chemical reaction includes signs that a new substance has formed.

Tags

NGSS.MS-PS1-2

Front

What happens to air molecules when they are heated?

Back

When air molecules are heated, they separate and move apart.

Tags

NGSS.MS-PS1-4

Front

What does bubbling and fizzing indicate in a chemical reaction?

Back

Bubbling and fizzing indicate that a gas is forming.

Tags

NGSS.MS-PS1-2

Front

What is density?

Back

Density is the mass of an object divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

Which liquid is the least dense?

Back

Oil is the least dense liquid compared to water, syrup, and a plastic bottle.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Tags

NGSS.MS-PS1-4

Front

What is a new substance?

Back

A new substance is a material that has different properties from the original substances after a chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the role of heat in chemical reactions?

Back

Heat can provide energy that causes molecules to move faster, leading to chemical reactions.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4