Changes in Matter

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances with different properties.

Tags

NGSS.MS-PS1-4

Front

What is a subscript in a chemical formula?

Back

A subscript is a small number written below and to the right of an element symbol in a chemical formula that indicates the number of atoms of that element in a molecule.

Front

Give an example of a physical change.

Back

Chopping food is an example of a physical change.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Tags

NGSS.MS-PS1-2

Front

How many atoms of hydrogen (H) are in the molecule C6H12O6?

Back

12

Tags

NGSS.MS-PS1-1

Front

What is the chemical formula for table salt?

Back

NaCl.

Tags

NGSS.MS-PS1-1

Front

Is NaCl a compound or an element?

Back

NaCl is a compound.

Tags

NGSS.MS-PS1-1

Front

What does the chemical formula C6H12O6 represent?

Back

C6H12O6 represents glucose, a simple sugar.

Tags

NGSS.MS-LS1-7

Front

What is the significance of the coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a chemical reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

Tags

NGSS.MS-PS1-5