Swisher 8th grade Physical Science Milestones review S8P1

Question 1

The solid, liquid, and gas states of water differ from each other in

Accepted Answer

the average speed of movement of the individual molecules.

Question 2

Which of the following is best classified as a mixture?

Accepted Answer

Soil

Question 3

What state of matter is best described by the following:

Accepted Answer

plasma

Question 4

If 1 kg of the compound toluene melts at –95°C, then 500 g of toluene will

Accepted Answer

melt at –95°C.

Question 5

Moisture that collects on the outside of a cold glass results from the process of

Accepted Answer

condensation.

Question 6

Which of the following expressions represents two compounds?

Accepted Answer

CO2, H2O

Question 7

Which particles combine to form molecules?

Accepted Answer

atoms

Question 8

Which of the following creates a new chemical substance?

Accepted Answer

candle burns.

Question 9

______ is an example of a chemical change.

Accepted Answer

Wood burning

Question 10

Which standard units are used when describing density?

Accepted Answer

grams/centimeter3

Question 11

What is the smallest particle of the element gold (Au) that can still be classified as gold?

Accepted Answer

atom

Question 12

Each element in the periodic table is assigned an atomic number. This number is the same as

Accepted Answer

the number of protons in the atom's nucleus.

Question 13

The photo shows a drill bit used in a power drill. Which metal would make the strongest bit?

Accepted Answer

steel

Question 14

Which of the following is a compound?

Accepted Answer

water

Question 15

The observation that ice cubes float in a glass of water can be explained by the fact that

Accepted Answer

ice is less dense than liquid water.

Question 16

Salt (NaCl) is a common substance. Which of the following best describes salt?

Accepted Answer

compound

Question 17

Mary wants to find the density of a small stone using displacement. Which tools will she need?

Accepted Answer

a balance and a graduated cylinder

Question 18

A hot air balloon rises because

Accepted Answer

molecules move faster and farther apart when heated.

Question 19

_________ is evidence of a chemical change.

Accepted Answer

A rusting car fender

Question 20

Which symbol represents sodium?

Accepted Answer

Na

Questions 20