Physical Science Check-in review

A ball is rolled at a constant speed away from its original position. Which best represents the motion of the ball?

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Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

Ann goes down the slide at the playground. At the bottom, she slides off and stops. Which most likely explains why she stops moving?

• The force of her hitting the ground causes the stop.

• Without the slide under her, the ability to move disappears.

• The energy needed for movement is used up on the slide.

• The force pulling her forward is only the slide, not the ground.

When a ____ is formed, two substances are combined and can be separated again. 

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Jim wakes up early in the morning and walks from his carpeted bedroom to the tiled kitchen. Which best describes why, despite being the same temperature, the tile floor feels cooler to his feet than the carpet?

• Title is a poor conductor of heat and transfers heat to his skin.

• Carpet is a bad conductor of heat and transfers heat to his skin.

• Title is a better conductor of heat and transfers heat away from his skin.

Which is the best example of a pushing force that reduces the speed of an object?

• a bat hitting a baseball

• a brake rubbing against a wheel

• a pedal turning the wheeels of a bicycle

• a skateboard wheel rolling against pavement

Tags

NGSS.MS-PS2-2

Why are pots and pans used for cooking usually made of metal?

• They are made of metal which conducts heat and will evenly cook the food

• They are made of metal which will slow down the cooking process

• They cost less

• They look better than wood or glass

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

The boulder and the soccer goal in the pictures have the same mass. The soccer frame has a mass of 145 kilograms (kg) and the net has a mass of 10 kilograms (kg). What is the mass of the boulder?

• 135 kilograms

• 145 kilograms

• 155 kilograms

• 165 kilograms

Peter helped his family move last week. He noticed when he tried to slide a heavy box across the floor, it was difficult. Which factor best illustrates what cuases this to happen?

• mass

• friction

• gravity

• magnetism

Which best describes a chemical change in paper?

• filing a paper

• mailing paper

• burning paper

• cutting paper in half

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When is friction needed during the course of motion?

• to speed up motion

• to slow down motion

• to keep motion at the same speed

• to keep motion in the same direction