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Mrs. Smith set up four ramps. The ramps had the heights shown here. Mrs. Smith held up a toy car. She explained that the students were going to determine if ramp height affects how far a car travels in 15 seconds. The students were told not to push the cars down the ramp. What force can the students use to move the cars down the ramp?

• pull

• gravity

• friction

• magnetism

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A team of movers needs to move a heavy sofa. One mover puts slippery pads under each leg of the sofa. This allows the sofa to slide easily across the floor. How does the use of the pads change the forces involved in moving the sofa?

• The friction force on the sofa decreases.

• The magnetic force on the sofa increases.

• The force of gravity on the sofa decreases.

• The pushing force by the movers increases.

Tags

NGSS.MS-PS2-2

A diffraction grating can be used to separate white light. When white light is separated by a diffraction grating, it is separated into __________.

• various colors of the visible spectrum

• violet light

• several different speeds of lights

• red, green, and blue light only

Tags

NGSS.MS-PS4-2

What does a wave carry?

• boats

• matter

• energy

• water

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Why can electromagnetic radiation travel through the vacuum of space?

• They require a medium.

• They do not require a medium.

Which of the following describes an example of a material undergoing a chemical change to become another material with different characteristics?

• Iron turns to rust when it is exposed to oxygen.

• When water boils, it turns into vapor, which is a gas.

• Oxygen can become liquid at a very low temperature.

• Gold can be spread out very thin to cover a large area.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

On a sunny day, Elena is cutting branches from a tree in her yard. At midday, she takes a break, leaving a pile of branches and leaves on the ground. When she returns and gathers the branches, she notices the leaves are wilted and crisp. Which of the following correctly describes what happened to the leaves?

• The trees had not received water for a long time before being cut.

• The warm temperature caused moisture to evaporate from the leaves.

• The nutrients cannot reach the leaves if the tree’s branches are not upright.

• The leaves had been covered in frost the week before, but had not wilted until now.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Imagine that you fill a bucket to the top with water and then place the bucket outside in freezing weather. Which of the following describes what will happen when the water in the bucket freezes?

• The level of the water and the bucket itself will not be changed by becoming frozen.

• The level of the water will be. lower once it is frozen and the molecules are more compact

• The sides of the bucket will be pushed out and the level of the water will be above the rim of the bucket.

• The level of the water will be uneven once it is frozen because some of the water will remain as a liquid in the bucket.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which answer describes a way that a liquid can be turned into a gas?

• Apply enough heat to cause evaporation.

• Apply freezing temperatures to cause condensation.

• Lower the temperature of the container to allow vaporization.

• Maintain a constant temperature over a long enough time to cause freezing.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Nadal is helping prepare a large meal for a family gathering. After cooking for several hours, he notices the windows inside the kitchen are covered in moisture. Which answer best explains how this happened?

• Evaporated moisture is condensing on the windows.

• Heating up the house will make moisture evaporate from the windows.

• It is raining outside and hot and dry inside, so water condenses inside the windows.

• Having many people in a house causes water to form condensation on the windows.

Tags

NGSS.MS-ESS2-5