Conservation of Mass Review

What is a measure of the amount of matter?

• mass

• volume

• weight

• density

Tags

NGSS.MS-PS1-5

Anything that has mass & takes up space

• gravity

• force

• matter

• volume

What is the smallest unit of matter?

• compound

• atom

• molecule

• product

What unit do we use to measure mass?

• grams (g)

• inches (in)

• miles (mi)

• minutes (min)

Tags

NGSS.MS-PS1-5

Substances present at the start of a chemical reaction

• subscripts

• coefficients

• reactants

• products

Tags

NGSS.MS-PS1-2

Substances that form as the result of a chemical reaction

• products

• reactants

• coefficients

• subscripts

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What is the Law of Conservation of Mass?

• Mass is created in a chemical reaction

• Mass is created in a physical change

• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

• Mass is never created or destroyed

Tags

NGSS.MS-PS1-5

A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted?

• 500 grams, because the cheese does not gain or lose mass just because it was melted
• 499 grams, because some of the cheese evaporates as it melts
• 502 grams, because the cheese absorbs heat as it melts

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

NGSS.MS-PS1-4

A 55-gram egg is placed in a pot. After the egg is boiled, which is most likely the mass of the egg?

• 50

• 55

Tags

NGSS.MS-PS1-5

If reaction starts with 20g of reactants it should produce 

• a total of 40g of products
• a total of 10g of products
• a total of 80 g of products
• a total of 20g of products

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2