Quiz about Gravity & Orbital Motion

Question 1

Two factors effecting the strength of gravity between 2 objects are...

Accepted Answer

mass and distance

Answer

weight and mass

Answer

distance and weight

Answer

mass and matter

Question 2

A(n) _____ is the curved path of an object around a point/object in space.

Accepted Answer

orbit

Answer

rotation

Answer

revolution

Answer

phase

Question 3

What prevents planets from drifting off into space and keeps it in the planets in our Solar System?

Accepted Answer

Gravity

Answer

Weight

Answer

Friction

Answer

Forward Motion

Question 4

What prevents planets from pulled into and crash into the Sun?

Accepted Answer

Inertia (Forward Motion)

Answer

Gravity

Answer

Weight

Answer

Friction

Question 5

Which of the following is required for planets to stay in orbit around the Sun? (choose all that apply)

Accepted Answer

Gravity

Accepted Answer

Inertia (Forward Motion)

Answer

Weight

Answer

Friction

Question 6

__________holds all of the planets in orbit around the sun.

Accepted Answer

Gravity

Answer

Force

Answer

Motion

Answer

Weight

Question 7

What are three things all planets have in common?

Accepted Answer

Orbit the sun, massive enough that their gravity controls all objects in the area and they are spherical

Answer

they are spherical, they have at least one moon and they have gravity

Answer

they have at least one moon, they are spherical and they were made by accretion

Answer

they are spherical, they orbit the sun and they have living organisms

Question 8

A planet with a large orbit has...

Accepted Answer

a long year

Answer

a short day

Answer

a long day

Answer

a short year

Question 9

A planet with a short orbit has...

Accepted Answer

a short year

Answer

a short day

Answer

a long day

Answer

a long year

Question 10

Which planet will take the least amount of time to revolve around the Sun?

Accepted Answer

Mercury

Answer

Venus

Answer

Earth

Answer

Mars

Question 11

Without gravity, the stars, planets and all objects in the universe would _______.

Accepted Answer

move in a straight line

Answer

continue to orbit each other

Answer

move in a random direction

Answer

stop moving

Question 12

What would happen to Earth if its forward motion stopped?

Accepted Answer

Earth would move toward the Sun and eventually crash into it.

Answer

Earth would continue to orbit in our Solar System normally.

Answer

Earth would sit motionless and not moving.

Answer

Earth would drift off in space because nothing would hold it in the Solar System.

Question 13

What would happen to Earth if the Sun's gravity dissappeared?

Accepted Answer

Earth would drift off in space because nothing would hold it in the Solar System.

Answer

Earth would continue to orbit in our Solar System normally.

Answer

Earth would sit motionless and not moving.

Answer

Earth would move toward the Sun and eventually crash into it.

Question 14

Here is a model of the gravitational force of Mars. Objects A and B have the same mass but are different distances from Mars. Which statement explains how the gravitational force affects the two objects?

Accepted Answer

Object B will be more affected by the gravitational force because it is closer to Mars than Object A.

Answer

Object A and B will be affected equally by the gravitational force.

Answer

Object A will be more affected by the gravitational force because it is farther from Mars than Object B.

Question 15

The satellite is orbiting Earth in the direction shown and is pulled toward Earth by gravity. What would happen if Earth's gravity suddenly disappeared?

Accepted Answer

The satellite would move into space in a straight line.

Answer

The satellite would fall to Earth.

Answer

The satellite would stop moving.

Answer

The satellite would continue to orbit Earth.

Question 16

The dotted lines in the picture show orbital paths of objects. Which statement is true about all of the orbits shown?

Accepted Answer

The force of gravity is what holds each object in its orbit.

Answer

All objects move in circular orbits.

Answer

The size of an object determines the size of its orbit.

Answer

The size of both an object and the object it orbits are equal.

Question 17

How does changing the distance of the string in the model represent the orbits of the planets?

Accepted Answer

the longer the string, the longer the orbit time of a planet

Answer

the longer the string means the larger the planet

Answer

the shorter the string, the longer the orbit time of the planet

Answer

the shorter the string, the smaller the planet

Question 18

Do planets affect the sun? Why?

Accepted Answer

Yes. Sun pulls on planets; planets pull on Sun.

Answer

No. The Sun pulls on the planets and keep them in orbit.

Question 19

Which planet would have the longest year?

Accepted Answer

Neptune

Answer

Mercury

Answer

Mars

Answer

Jupiter

Question 20

Which planet would have the greatest velocity?

Accepted Answer

Mercury

Answer

Mars

Answer

Jupiter

Answer

Neptune

Question 21

Which variables affect gravity?

Accepted Answer

mass

Accepted Answer

distance

Answer

speed

Answer

volume

Answer

weight

Question 22

Which of the following is required for planets to stay in orbit around the Sun? (choose all that apply)

Accepted Answer

Gravity

Accepted Answer

Inertia (Forward Motion)

Answer

Weight

Answer

Friction

Question 23

Why do we orbit the Sun and not the other way around?

Accepted Answer

lighter objects tend to orbit heavier ones

Answer

brighter objects tend to orbit duller ones

Answer

duller objects tend to orbit brighter ones

Answer

heavier objects tend to orbit lighter ones

Question 24

The Earth doesn't totally get sucked into the Sun, because ___

Accepted Answer

it's moving fast enough around it

Answer

it's moving too slowly around it

Answer

it's too heavy too pull in

Answer

it's too far away

Question 25

The shape of a planet's orbit around the sun is best described as _________.

Accepted Answer

elliptical

Answer

circular

Answer

spiral

Answer

conical

Question 26

The early solar system was made up of mostly what?

Accepted Answer

hydrogen, helium and dust

Answer

hydrogen, oxygen and dust

Answer

hydrogen, iron and dust

Answer

carbon, hydrogen and dust

Question 27

Gravitational forces are always

Accepted Answer

Attractive

Answer

Pushing

Answer

repulsive

Answer

objects

Question 28

Which of the following best describes the formation of the solar system?

Accepted Answer

A rotating disk of gas and dust was drawn together by the force of gravity.

Answer

The Sun ejected rocky material which formed the planets due to magnetic attraction forces.

Answer

One very large planetary body broke apart into several smaller planets.

Answer

Several stars of different masses cooled and formed the planets and the Sun.

Question 29

Why do some planets have moons in our solar system?

Accepted Answer

They have enough gravity to hold a moon in orbit

Answer

They are close to the sun

Answer

They are special

Answer

All planets have moons

Question 30

What force played a major role in the formation of the solar system?

Accepted Answer

Gravity

Answer

Magnetism

Answer

Push

Answer

Pull

Question 31

Which planet would have the largest gravitational pull?

Accepted Answer

Jupiter

Answer

Venus

Answer

Mars

Answer

Neptune

Question 32

How does changing the distance between objects affect the force of gravity?

Accepted Answer

Decreasing distance increases gravity

Answer

Increasing distance increases gravity

Answer

Mr. Deem knows, but he's not telling

Answer

Distance does not affect gravity

Question 33

Match the term: The tendency of an object to resist a change in its motion

Accepted Answer

inertia

Answer

acceleration

Answer

mass

Answer

frame of reference

Question 34

Suppose that this person left go of the chain. As soon as he releases the chain the balls inertia would....

Accepted Answer

result in the ball flying off in a straight line away from the person.

Answer

make the ball immediately stop and fall straight to the ground.

Answer

keep the ball moving in a circle around him.

Answer

either a, b, or c -- depending on whether the person continues to push it

Question 35

Which 2 factors keep a planet in its orbit around the sun?

Accepted Answer

inertia and gravity

Answer

mass and distance

Answer

eccentricity and velocity

Answer

force and speed

Question 36

Which of the following best describes the formation of the solar system?

Accepted Answer

A rotating disk of gas and dust was drawn together by the force of gravity.

Answer

The sun ejected rocky material which later went on to form the planets.

Answer

One very large planetary body broke apart into several smaller planets.

Answer

Several stars of different masses cooled and formed the planets and the sun.

Question 37

When Sean was riding his bike and braked suddenly, he kept moving forward due to

Accepted Answer

inertia

Answer

gravity

Answer

friction

Answer

weight

Question 38

What is the tendency of an object to resist a change in motion?

Accepted Answer

inertia

Answer

coffee

Answer

motion

Answer

gravity

Question 39

Which explains why the tablecloth trick works?

Accepted Answer

The dishes have inertia, and therefore stay on the table.

Answer

The dishes are stuck in place due to air resistance.

Answer

The tablecloth is an ilusion.

Answer

magic

Question 40

What is the relationship between heavy objects and inertia?

Accepted Answer

Heavy objects have more inertia.

Answer

Only heavy objects have inertia.

Answer

Heavy objects have less inertia.

Answer

Heavy objects have no inertia.

Question 41

Because of inertia, a moving object will keep ________.

Accepted Answer

moving

Answer

at rest

Answer

in one spot

Answer

inertia

Question 42

Because of inertia, a resting object will remain at ________.

Accepted Answer

rest

Answer

a constant speed

Answer

school

Answer

inertia

Question 43

Objects with greater _________ also have greater inertia.

Accepted Answer

mass

Answer

speed

Answer

temperature

Answer

friction

Question 44

The amount of matter in an object is called ______________.

Accepted Answer

mass

Answer

displacement

Answer

friction

Answer

friction

Question 45

What forces cause a planet to orbit?

Accepted Answer

gravity and inertia

Answer

gravity and orbit

Answer

gravity and mass

Answer

gravity and weight

Question 46

What two forces affect gravity?

Accepted Answer

mass and distance

Answer

mass and inertia

Answer

mass and force

Answer

mass and weight

Question 47

As distance between objects increases, the pull of gravity...

Accepted Answer

decreases

Answer

increases

Answer

Stays the same

Question 48

Which of the following never changes no matter where you are in the universe?

Accepted Answer

Mass

Answer

Pounds

Answer

weight

Answer

Force

Question 49

You travel to the Moon. Which of the following is true? (choose ALL that are true)

Accepted Answer

Your mass stays the same

Accepted Answer

Your weight is different

Answer

Your weight stays the same

Answer

Your mass is different

Question 50

Why do all of the planets orbit the sun rather than Earth?

Accepted Answer

the sun has more mass

Answer

the sun is a star

Answer

the Earth is heavier

Answer

the sun is in the middle of the milky way

Question 51

What is weight?

Accepted Answer

how strongly your body is being pulled down by gravity

Answer

how much fat is on your body

Answer

how strong you are

Answer

when you have to stand in line

Question 52

Inertia tells us that we need ____________ to get an object moving or to make it stop.

Accepted Answer

a force

Answer

gravity

Answer

friction

Answer

strength

Question 53

What would happen to Earth if there were no inertia?

Accepted Answer

Earth would crash into the sun

Answer

Earth would fly out to space

Answer

Earth would collapse

Answer

Earth would orbit the moon

Question 54

What can be described as "falling and missing the ground"?

Accepted Answer

orbiting

Answer

accelerating

Answer

free-falling

Answer

attaining escape velocity

Question 55

A rock thrown hard enough sideways will orbit the Earth once every _____

Accepted Answer

90 minutes

Answer

9 minutes

Answer

9 hours

Answer

90 hours

Question 56

The planets of our solar system have orbits that are _____

Accepted Answer

ellipses

Answer

circular

Answer

parabolas

Answer

hyperbolas

Question 57

In order to break free of a planet's gravity, an object must be moving at _____ .

Accepted Answer

escape velocity

Answer

getaway acceleration

Answer

a break-away pace

Answer

a liberation altitude

Question 58

What is the escape velocity of the Earth?

Accepted Answer

about 11 kilometers per second

Answer

about 110 kilometers per second

Answer

about 11 kilometers per hour

Answer

about 110 kilometers per hour

Question 59

At the height of the space station, gravity, compared to that at Earth's surface, is _____

Accepted Answer

about 90% as strong

Answer

about 0.9% as strong

Answer

about 9% as strong

Answer

about 49% as strong

Question 60

What does NASA like to call the free-fall condition while on the space station?

Accepted Answer

microgravity

Answer

microweight

Answer

microdensity

Answer

micromass

Question 61

In space you have the same mass as you do on Earth, but no _____

Accepted Answer

weight

Answer

microgravity

Answer

density

Answer

pressure

Question 62

An object moving along a path controlled by gravity is said to be _____

Accepted Answer

in orbit

Answer

in constant motion

Answer

in uniform motion

Answer

massless

Question 63

Speed is different from velocity because

Accepted Answer

Velocity has a direction

Answer

Speed uses Distance /Time

Answer

Velocity doesn't include time

Answer

Velocity doesn't include distance

Question 64

What is speed?

Accepted Answer

how much distance is covered over a period of time

Answer

how far you go

Answer

how fast you accelerate

Answer

the change in the location of a object

Gravity & Orbital Motion

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