Physical Science Part 2

A contact force is any force that requires contact to occur.

Which of the following best describes motion caused by a contact force?

• a toy car rolling down a ramp

• a paperclip being pulled up by a magnet

• an apple falling to the ground from a tree

• the wind blowing leaves across the ground

You walk across floor tiles that feel cool to your bare feet. Which of the following best explains the flow of energy in this situation?

• Heat flows from the floor tiles to your feet.

• Heat flows from your feet to the floor tiles.

• Cold flows from the floor tiles to your feet.

• Cold flows from your feet to the floor tiles.

Tags

NGSS.MS-PS3-3

As a student rides his bike, he realizes that his speed increases as he goes downhill and decreases as he goes uphill.

What kind of energy transformation occurs as he rides the bike downhill?

• Kinetic energy is transformed into potential energy.

• Potential energy is transformed into kinetic energy.

• Electrical energy is transformed into kinetic energy.

• Mechanical energy is transformed into potential energy.

Tags

NGSS.MS-PS3-5

A student pushes a toy car and lets it go. The toy car rolls and gradually comes to a stop.

Which of the following best explains why the car stops?

• A force is applied in a direction that is opposite to the pull of gravity.

• A force is applied in the same direction as the force that is pushing the car upward.

• A force is applied in a direction that is opposite to the direction in which the car is moving.

• A force is applied in a direction that is the same as the direction in which the car is moving.

Tags

NGSS.MS-PS2-2

All matter is made of atoms. Which of the following statements best describes the basic structure of an atom?

• Electrons and protons are in motion around a nucleus that contains neutrons.

• Neutrons are in motion around a nucleus that contains protons and electrons.

• Protons are in motion around a nucleus that contains electrons and neutrons.

• Electrons are in motion around a nucleus that contains protons and neutrons.

Below is a diagram of the electromagnetic spectrum.  Use the diagram to answer questions as needed. Ultraviolet light comes from the Sun and can sometimes cause serious health issues such as skin cancer. Why does ultraviolet light have this effect on our bodies, but visible light does not?

• Ultraviolet light is attracted to our skin.

• Ultraviolet light moves faster than visible light.

• Ultraviolet light has less energy than visible light.

• Ultraviolet light has more energy than visible light.

Tags

NGSS.MS-PS4-2

What happens when a rocket takes off and moves away from Earth? Ignore the mass and weight contributed by fuel.

• Its mass decreases and weight increases.

• Its mass increases and weight decreases.

• Its mass remains constant and weight increases.

• Its mass remains constant and weight decreases.

Tags

NGSS.MS-PS2-4

A student is investigating forces in the lab. If the student applies an unbalanced force to an object, what could happen?

• Only the object's speed can change.

• Only the object's direction can change.

• The object's speed, direction, or both can change.

• Neither the object's speed nor direction can change.

Tags

NGSS.MS-PS2-2

Which of the following actions involves an energy transformation of changing light energy into electrical energy?

• using a gasoline-powered car

• using a solar-powered calculator

• using charcoal on an outdoor grill

• using a battery-powered cell phone

The water cycle, weather patterns, and climate are closely linked. What is the energy source for the water cycle?. 

• energy from the Sun

• energy from the wind

• energy from the greenhouse effect

• energy from air and water currents

Tags

NGSS.MS-ESS2-4