Physical Science Midterm

1.

1 point

Which of the following is a compound?

oxygen

carbon dioxide

nitrogen

2.

1 point

Why does mixing increase the speed at which a solid dissolves?

Mixing causes the solute particles to separate from one another and spread out more quickly among the solvent particles.

Mixing increases the amount of contact between the solute and the solvent.

Mixing causes particles to move more quickly, causing them to spread out more evenly.

3.

1 point

The International System of Units...

is based on stanardized body measurements.

contains units that are based on the number 10.

is also known as the English system.

4.

1 point

Boyle's law states that for a fixed amount of gas at a constant...

temperature, the volume decreases as the pressure increases

pressure, the volume increases as the temperature decreases

temperature, the volume increases as the pressure increases

5.

1 point

Which of the following is not an example of Newton's third law of motion?

neither of these

hitting a baseball with a bat

an apple falling from a tree

6.

1 point

Sitting in a chair is an example of Newton's...

first and third laws

second law

second and third laws

7.

1 point

Medicines that instruct you to shake the bottle well before use are most likely...

suspensions

alloys

solutions

8.

1 point

Which of the following best describes chicken noodle soup?

compound

element

mixture

9.

1 point

According to Newton's first law of motion, a moving object that is not acted upon by an unbalanced force will...

remain in motion.

transfer its energy to another object.

eventually come to stop.

10.

1 point

The atoms and molecules in matter...

both are constantly moving and move faster at higher temperatures

move faster at higher temperatures

are constantly moving

11.

1 point

Boiling is __________ that occurs throughout a liquid.

vaporization

condensation

melting

12.

1 point

You are on a bus traveling 15 m/s east and you decide to move from the front of the bus to the back walking at a rate of 1 m/s. Your resultant velocity is...

1 m/s west

14 m/s east

15 m/s east

13.

1 point

Tom's 7-year-old brother is more difficult to pick up than his 2-year-old sister because...

his sister has more inertia

boys are always heavier than girls

his brother has more inertia

14.

1 point

A helium-filled balloon will float in air because...

there is more air than helium.

helium is less dense than air.

helium is as dense as air.

15.

1 point

When you add a rock to 70 mL of water in a graduated cylinder, the water rises to 80 mL. The mass of the rock is 20 g. What is the rock's density?
HINT: Density = mass / volume

2 g/cm3

0.5 g/cm3

0.25 g/cm3

16.

1 point

Which of the following has the MOST gravitational pull on it?

a golf ball

an elephant

a bowling ball

17.

1 point

Which of the following games uses conservation of momentum?

bowling

both billiards and bowling

billiards

18.

1 point

A graduated cylinder contains 250 mL of water. After adding a nugget of gold to the water, the glass holds 265 mL of liquid. What is the volume of the gold nugget?

265 cm3

15 cm3

15 mL

19.

1 point

In the Olympic sport of discus throwing, a discus thrower will spin around in a circle with the discus and suddenly stop spinning and let go of the discus. Instead of stopping with the thrower, the discus flies off into the air because of its...

mass

inertia

gravitational force

20.

1 point

How would you measure the volume of a screw?

by multiplying its length by its width by its height

by placing it in a graduated cylinder of water and seeing how much liquid it displaces

by placing it on a balance

21.

1 point

Freezing and __________ occur at the same temperature.

condensation

vaporization

melting

22.

1 point

An unknown sample scatters light and passes through a filter without leaving a residue. The sample is most likely a...

solution

colloid

compound

23.

1 point

Pressure depends on...

the depth of the fluid.

the total amount of fluid present.

the temperature of the fluid.

24.

1 point

Which of the following describes a mixture?

formed from two or more substances chemically combined

made up of two or more substances that keep their identities

made up of two or more substances joined in a specific ratio

25.

1 point

Water is about 1,000 times more __________ than air and, therefore, exerts greater pressure than air.

dense

fluid

buoyant

26.

1 point

The meniscus of a liquid in a graduated cylinder is caused by...

surface tension

viscosity

pressure

27.

1 point

The particles of water that evaporate from an open container have __________ than the particles that remain.

more speed

more speed and higher energy

higher energy

28.

1 point

Which of the following has the LEAST matter?

a table tennis ball

a bowling ball

an elephant

29.

1 point

A __________ object has more inertia than a 20 kg object.

5 kg

2 mg

30,000 g

30.

1 point

The SI unit for expressing the amount of matter in an object is the...

kilogram (kg).

kelvin (K).

newton (N).

31.

1 point

A solution that contains a large amount of solute is best described as...

dilute

unsaturated

concentrated

32.

1 point

Air does NOT have...

length

volume

mass

33.

1 point

Is it just as hard to catch a thrown bowling ball as it is to throw it?

The bowling ball has less inertia while in motion, so it's easier to catch than it is to throw.

The bowling ball has the same inertia whether it's standing still or moving, so throwing it and catching it are both equally difficult.

The bowling ball has more inertia while in motion so it's harder to catch it.

34.

1 point

A 546 g fish displaces 420 cm3 of water. What is the density of the fish?
HINT: Density = mass / volume

1.3 g/cm3

126 g/cm3

0.77 g/cm3

35.

1 point

In a gaseous state, particles...

have both empty space between them and move independently of one another

move independently of one another

have empty space between them

36.

1 point

An objects velocity remains constant when its __________ do not change.

speed and direction

speed and time in motion

time in motion and direction

37.

1 point

Which of the following does NOT describe elements?

They can be broken down into simpler substances.

They can join together to form compounds.

They have unique sets of properties.

38.

1 point

Which of the following contains plasma?

a fire

steam

dry ice

39.

1 point

Rolling friction...

is usually less than sliding friction.

is usually greater than sliding friction

makes it difficult to move objects on wheels.

40.

1 point

A large quartz crystal is added to a graduated cylinder containing 80 mL of water, raising the level to 90 mL of water. What is the volume of the quartz?

10 cm3

80 cm 3

90 mL