When balls of different masses are dropped from the same height at the same time, which ball will reach the ground first?

They will reach the ground at the same time.

The heavier ball will land first

The lighter ball will land first.

If a feather and a ball are dropped at the same time from the same height on Earth, why would the ball land first?

Because the feather was affected by air resistance.

Because the feather was lighter

Because gravity acts equally on all objects regardless of their mass

Because the ball could increase in speed as it fell.

List three examples of gravity acting in your everyday life.

Objects falling, staying grounded, and orbiting the Earth

Charging a phone, turning on a light, and using a remote control

Swimming, flying a kite, and playing a video game

Eating, sleeping, and reading a book

A force that acts between objects and depends on their masses

A force that pushes objects away from each other

A type of energy that objects emit

A measure of how fast an object is moving

Why do you think the pink and blue alien is finally able to move to the other planet?

Because the other planet has no gravity.

A rock dropped from a height of 100 m on Earth would take 4.51 seconds to reach the surface. It would take the same rock 17.53 seconds to land if it was dropped from the same height on the planet Pluto. Why does it fall so much faster on Earth?

The mass of the rock is different on different planets.

Earth has less mass than Pluto.

Earth has a magnetic field that acts on the rock.

Write a rule that compares the mass of the body and gravitational pull.

Greater mass means greater gravitational pull

Greater mass means less gravitational pull

Mass of the body does not affect gravitational pull

Gravitational pull is the same for all masses

What would happen if the mass of the Sun increased?

Earth would be pulled closer to the sun.

Earth would be ejected from its orbit.

Earth's orbit would remain unchanged.

Earth's orbit would become more stable and circular.

What would happen if the mass of the Sun decreased?

Earth's orbit would become larger and less stable.

Earth's orbit would become more stable.

Earth would move closer to the Sun.

The length of a year on Earth would decrease.

What would happen to the Moon if the Earth’s mass decreased?

The Moon would drift away from Earth.

The Moon would move closer to Earth.

The Moon would move in a straight line.

The Moon's orbit would become more elliptical.

What would happen to the Moon if the Earth’s mass increased?

The Moon would move closer to Earth.

The Moon would drift away from Earth.

The Moon would move in a straight line.

The Moon's orbit would not be affected.

How would you describe gravity in your own words?

The force that pulls objects towards the center of the Earth

The process by which plants produce food

The cycle of water from the Earth's surface to the atmosphere and back

The change of states between solid, liquid, and gas

How does the mass of an object affect its gravitational force?

Greater mass increases the gravitational force

Greater mass decreases the gravitational force

Mass does not affect gravitational force

Only the mass of the Earth affects gravitational force

The original EVA (extravehicular activity) suit weighed about 180 pounds on Earth. The clothing used by astronauts to train for moon exploration on Earth was similar to the actual EVA suit but lighter materials were used. Why was it OK to use lighter materials for training purposes?

The lower gravity on the moon would make the EVA suits less heavy when used in space.

If they didn't use lighter materials the astronauts would get too tired while training.

The heavier suits were needed only in space because it is so cold in space.

The heavier suits would be too hot to practice in.

What question were we trying to solve in this unit?

What are the effects of an asteroid collision and how can we prevent a future one?

How can we calculate the trajectory of asteroids?

What are the gravitational interactions between Earth and asteroids?

How do asteroids form in the solar system?

If you were asked to explain gravity to a younger student, what two factors would you need to include in your explanation?

The masses of different objects and the distance between the objects.

The thickness of the atmosphere on different planets and the gasses in the atmosphere.

The distance of any object from the sun.

The density of an object compared to its size.

If you examine two different craters and one crater is much deeper than another, what can you infer about the meteorite that made the deeper crater?

The meteorite that made the deeper crater was the meteorite that had greater mass.

The meteorite that made the deeper crater was not round.

The meteorite that made the deeper crater had less mass tha the meteorite that made the smaller crater.

You cannot infer anything about the original meteorite from the size of the crater.

An asteroid has been discovered that is on a direct path toward Earth. It is about 115 million miles away from Earth and is expected to strike the planet in about 220 days. After looking at all the available models for preventing the asteroid from striking Earth, which would be the model most likely to succeed?

Deflect its path by crashing into it with a small space probe moving at a very high speed.

Hit it with a bunch of nuclear weapons.

Trap it inside a giant net equipped with rockets to overcome the inertia of the asteroid.

Develop a new technology to vaporize the meteorite while it is still deep in space.

During an experiment in which the force exerted by balls of different masses was tested the balls were rolled down ramps of identical heights. Why did the ramps need to be the same height?

Changing the height of the ramp would affect the force exerted by the different balls.

If the ramps were too steep the balls would bounce when they hit the bottom.

If the ramps were too low the balls would not roll.

All of the lab kits came with ramps of the same height.

PS2-4 Gravity Quiz

Authored by Lee Hawkins

Science

7th Grade

NGSS covered

Used 4+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the effects of an asteroid collision?

Changes in climate

Formation of new stars

Increase in biodiversity

Development of new technologies

Tags

NGSS.MS-ESS3-2

NGSS.MS-ESS2-2

NGSS.MS-LS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can we prevent a future asteroid collision?

By building stronger buildings

By reducing pollution

By monitoring asteroids and implementing deflection strategies

By increasing space exploration

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Gravitational interactions depend on what factors?

The distance between objects and the presence of magnetic fields

The color and temperature of the objects

The masses of the interacting objects and the distance between them

The chemical composition of the objects and their surface area

Tags

NGSS.MS-PS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following descriptions defines gravity?

A) A repulsive force that only acts on certain objects

B) An attractive force that acts between objects in the universe

C) A force that only acts on objects with large mass

D) A force that is strongest at the edge of the universe

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Do gravitational interactions depend on the mass of the interacting objects?

A) Yes, they depend on the mass of the objects

B) No, they do not depend on the mass of the objects

C) Yes, but only for objects with small mass

D) No, they only depend on the distance between objects

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During a class demonstration a teacher dropped two balls of different masses at the same time. Which way did they fall?

Upwards

Downwards

Sideways

They did not fall

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What force is affecting a pair of falling balls?

Magnetic force

Friction

Gravity

Electric force

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-2

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