chem final review

Which step in the scientific method requires you to use your senses to obtain information?

• stating a theory

• designing an experiment

• revising a hypothesis

• making an observation

A golf ball has more mass than a tennis ball because it...

• a. contains different kinds of matter

• b. has a definite composition

• c. contains more matter

• d. takes up more space

when an iron nail is ground into powder, its mass,

• a. decreases

• b. increases

• c. stays the same

• d. cannot be determined

Tags

NGSS.HS-PS1-7

which of the following is a chemical property?

• a. color

• b. hardness

• c. ability to react with oxygen

• d. freezing point

a substance that can be separated into two or more substances only by a chemical change is a(n) ____________.

• a. mixture

• b. element

• c. compound

• d. solution

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When paper turns yellow-brown upon exposure to sunlight, what type of change is likely taking place?

• a. neither a physical or chemical change

• b. a physical change

• c. a chemical change

• d. both physical change and a chemical change

Tags

NGSS.MS-PS1-2

which state of matter expands when heated and is easy to compress?

• gas

• solid

• liquid

• all of the above

Tags

NGSS.HS-PS3-2

what must occur for a change to be a chemical reaction?

• a. there must be a change in chemical properties

• b. the change must involve a change in mass

• c. there must be a change in physical properties

• d. the change must involve a change in volume

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

which state of matter has a definite volume and takes the shape of its container?

• a. solid

• b. liquid

• c. gas

• d. both liquid and gas

Tags

NGSS.MS-PS1-4

the chemical formula of a compound does NOT indicate the ____________.

• a. relative properties of the elements in the compound

• b. identity of the elements in the compound

• c. the composition of the compound

• d. how elements are joined in the compound