1. While playing hockey in gym class, Timmy is trying to send a plastic puck across the floor and into the goal. Which of the following best describes the forces acting on the plastic puck as it travels across the floor and into to the goal? (6.P.13.1)

• electromagnetic and gravity

• gravity and friction

• mechanical force and friction

• magnetism and friction

Tags

NGSS.MS-PS2-2

A television satellite is orbiting at a constant distance around Earth. Which of the following statements best describes the impact of gravity on the Earth and the satellite? (6.P.13.2)

• The Earth and the satellite do not have any gravitational pull because no objects in space have gravity.

• The gravitational pull of Earth and the satellite are the same because all objects in space have the same gravity.

• The gravitational pull of Earth is stronger than the gravitational pull of the satellite because larger objects in space have greater gravity

• The gravitational pull of the satellite is stronger than the gravitational pull of the Earth because smaller objects in space have greater gravity

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

On Earth, a brick has a mass of 10 kg and a weight of 5 lbs. What predictions could we make about the mass and weight of the brick on the Moon, where there is less gravity?

• The mass of the brick would be less than 10 kg on the Moon

• The weight of the brick could be less than 5lbs on the Moon

• The mass of the brick would be greater than 10 kg on the Moon

• The weight of the brick could be greater than 5lbs on the Moon

Tags

NGSS.MS-PS2-4

A teacher pushes a 50 g car and a 100 g car across a flat surface, both with the same amount of force. She asks her students to describe the forces shown by the demonstration. The following are their responses. (6.P.13.3)

Ashley: Since both cars have the same force pushing on them, they will both push back with the same amount of force.

Brian: Both cars have the same amount of force pushing on them, but the 50 g car pushes back with less force because it has less mass.

Carlos: Both cars have the same amount of force pushing on them, but the 100 g car pushes back with less force because it has more mass.

Diane: Since both cars have the same amount of force pushing on them, they will both have a backward force but the force will vary.

• A. Ashley

• A. Brian

• A. Carlos

• A. Diane

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Sunscreen bottles often include the phrase: “Protects against UVA and UVB waves.” This refers to ultraviolet radiation coming from the sun. Which of the following is true of ultraviolet radiation?

• Ultraviolet radiation has shorter wavelengths than x-rays, therefore it is more dangerous than x-rays

• Ultraviolet radiation has shorter wavelengths than visible light, therefore it is more dangerous than visible light

• Ultraviolet radiation has longer wavelengths than infrared light, therefore it is more dangerous than infrared light

• Ultraviolet radiation has longer wavelengths than gamma radiation, therefore it is more dangerous than gamma radiation

Tags

NGSS.HS-PS4-4

What is the initial source of all of the wavelengths of the electromagnetic spectrum?

• A. electromagnetic energy coming from the sun

• A. electromagnetic energy coming from electricity

• A. electromagnetic energy coming from visible light

• A. electromagnetic energy coming from the atmosphere

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which medium does sound travel fastest in?

• gas

• liquid

• solid

• space

Tags

NGSS.MS-PS4-2

Based on the Law of Conservation of Energy, which of the following is the most likely source of the “missing” energy on any experiment?

• A. gravitational energy

• A. mechanical energy

• A. thermal energy

• A. wind energy

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

On a cold, winter morning, Karla uses a chemical hand warmer to warm his hands. Which of the following describes the heat flow that took place between the hand warmer and his hands?

• A. from air to the hand warmer

• A. from the air to Julio’s hand

• A. from Julio’s hand to the warmer

• A. from the warmer to Julio’s hand

Tags

NGSS.MS-PS3-3

Sonia has three different sized blocks of copper. She made observations and measurements of each block. Which of her measurements would be different?

• A. the density of each block

• A. the electrical conductivity of each block

• A. the melting point of each block

• A. the volume of each block