Big Idea 12 and 13

Which of the following best explains why a person standing on the Moon can jump higher than a person standing on Earth?

• There is no gravity on the Moon

• Everything has less mass on the Moon

• Earth's gravity is very weak on the Moon

• The Moon's gravitational pull is less than Earth's

Magnets have a negative and positive pole. What happens if you try to touch the positive pole of one magnet to the negative pole of another magnet?

• The negative and positive poles will repel each other.

• The negative and positive poles will cancel each other out

• The negative and positive poles will be attracted to each other

• The negative and positive poles will neither attract nor repel each other

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

David and Peter were moving a bookshelf across the carpet in their classroom. Even though they pushed as hard as they could, the bookshelf would only move a few inches at a time.  
Which of the following best explains what happened as they tried to push the bookshelf?

• The force of gravity opposed the motion of the bookshelf

• The force of friction opposed the motion of the bookshelf

• When they tried to push the bookshelf, air resistance acted against them

• When they pushed the bookshelf, the bookshelf pushed back with an equal and opposite force

Maria pushes with equal force on two objects. Object 1 has twice as much mass as Object 2. Which of the following statements is true?

• Both objects will remain still

• Object 1 will accelerate faster than object 2

• Object 2 will accelerate faster than object 1

• Both objects will accelerate at the same rate

Tags

NGSS.MS-PS2-2

Jonathan pushes a box on the floor and is unable to make it move. Which of the following is the best explanation for why the box does not move?

• The box has a very small mass

• Jonathan is pushing in the wrong direction

• The mass of the box requires a greater force to move it

• Friction occurs in the same direction that Jonathan is pushing

Tags

NGSS.MS-PS2-2

If all the forces acting upon an object at rest are balanced, what will the object do?

• The object will stay still

• The object will slow down

• The object will accelerate

• The object will change position

A student uses a toy car and ramp to investigate how surface affects the speed of a rolling object. What should the student intentionally change when doing this experiment?

• The color of the toy car

• The distance the toy car travels

• The material on which the toy car rolls

• The weight of the toy car

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

NGSS.4-PS3-1

Something that makes an object start moving, stop moving, speed up, or slow down is a(n) .

• load

• position

• effort

• force

Tags

NGSS.MS-PS2-2

The tendency of an object to stay in motion or at rest until a force acts upon it is

• inertia

• gravity

• speed

• frame of reference

A child rides a wagon down a hill. Eventually, the wagon comes to a stop. Which is most responsible for causing the wagon to stop?

• gravity acting on the wagon

• the mass of the wagon

• friction acting on the wagon

• the mass of the child

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4