PSCI Exam 1

Question 1

To hit a golf ball farther, you should “follow through the swing”’ because

Answer 1

Of the relationship Δp = Ft

Question 2

An experimental situation used as the basis of comparison is the

Answer 2

Control group

Question 3

A block of iron is transported to the Moon. Which of the following is true

Answer 3

Its mass remains the same, but its weight decreases

Question 4

Which of the following is NOT a SI unit of the property it measures?

Answer 4

volume-liter

Question 5

Use the graph below to determine what is the speed of the car in section a

Answer 5

Easy graph

Question 6

Weight is best described as

Answer 6

The downward force exerted on objects due to gravity

Question 7

The most recently developed scientific theory is

Answer 7

Plate tectonic theory

Question 8

The English unit of volume closest in size to a liter is

Answer 8

Quart

Question 9

A statement describing a relationship that is observed in nature to occur consistently time after time is a (an)

Answer 9

Scientific law

Question 10

Whenever an object is standing still, the value(s) that is/are always zero is/are

Answer 10

All of the above (speed, momentum, velocity)

Question 11

Gravity is an attractive force between

Answer 11

All objects everywhere

Question 12

The newton is a unit of

Answer 12

Force

Question 13

The weight of a 50 kg box is closest to

Answer 13

500 N

Question 14

Imagine a 10 g chunk of aluminum (r = 2.7 g/cm3) and a 10 g chunk of iron (r = 7.9 g/cm3). Which of the following is true?

Answer 14

The chunk of iron is smaller than the chunk of aluminum

Question 15

One of the basic differences between science and a pseudoscience is the lack of

Answer 15

Valid and reliable experimental studies

Question 16

A tentative thought or experiment derived explanation is known as a(an)

Answer 16

Hypothesis

Question 17

If you consider the total distance and total time for a trip, you are calculating a(an)

Answer 17

Average speed

Question 18

Everything that happens in the universe can be traced to interactions of

Answer 18

Four fundamental forces

Question 19

The recreation of an event by comparing two situations in which all the factors are identical except one is called a

Answer 19

Controlled experiment

Question 20

The property of volume is a measure of

Answer 20

How much space the object occupies

Question 21

Equations are used to

Answer 21

All of the answers are correct (describe how quantities change together, define a concept, describe a property)

Question 22

Convert 1,270 millimeters into centimeters

Answer 22

127 cm

Question 23

In the equation A = πr2, π (pi) is a

Answer 23

Numerical constant

Question 24

Claims that appear to be pseudoscience should be

Answer 24

Tested experimentally.

Question 25

Which of the following represents a concept of density?

Answer 25

Compactness

Question 26

A statement describing a relationship that is observed in nature to occur consistently time after time is a

Answer 26

scientific law.

Question 27

If a cube of Jell-o is cut into two pieces, what total property of the new pieces change?

Answer 27

surface area

Question 28

Which of the following is not a SI unit of the property it measures?

Answer 28

volume - liter

Question 29

When something cannot be directly observed, it can be represented by a

Answer 29

Model

Question 30

In the text, the equation V = tk is used to describe the relationship between the volume of a gas tank and the time required to fill it. The symbol “k”

Answer 30

is the proportionality constant.

Question 31

What is the mass in kilograms of gasoline (density = 0.680 g/cm3) in a full 92.1 L gas tank? Be sure your units cancel out.

Answer 31

62.6 ; mass=p (density)*vol

Question 32

Ignoring air resistance, the velocity of a falling object

Answer 32

is constantly increasing.

Question 33

The tendency of a moving object to remain in unchanging motion in the absence of an unbalanced force is called

Answer 33

Inertia

Question 34

The newton is a unit of

Answer 34

Force

Question 35

If an unbalanced force applied to an object doubles, then

Answer 35

its acceleration doubles.

Question 36

What force is needed to give a 2,386 kg truck an acceleration of 2.7 m/s 2 over a lever road. Units should be in Newtons.

Answer 36

6,442 ; Force=mass*acceleration (units are in Newtons)

Question 37

What variable determine your weight?

Answer 37

mass and gravity

Question 38

Which location would require the greatest mass if the weight of an object is the same in each place?

Answer 38

Earth’s moon