MSTEP Science Review #1

Which planet is known as the Red Planet?

• Earth

• Mars

• Jupiter

• Saturn

Which of the following statements explains why a piece of cold butter softens when it comes in contact with warm toast?

• The thermal energy of the toast increases and the thermal energy of the butter decreases.

• The thermal energy of the toast decreases and the thermal energy of the butter increases.

• The thermal energy of the toast and the butter remain the same.

• The thermal energy of the toast and the butter decreases.

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Sound travels fastest through which medium?

• solid

• liquid

• gas

• vacuum

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Four items are placed the same distance from the magnet. Which one of the objects will be the easiest for the magnet to pull?

• a 1 gram piece of paper—not magnetic

• a 2 gram eraser—not magnetic

• a 3 gram steel paper clip—lightest object that is magnetic

• a 4 gram iron nail—magnetic

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Mass is Anything that has weight and shape has mass. Mass is the quality that gives things weight anywhere there's gravity.

• how much space an object takes up

• the amount of matter in an object

• the weight of an object

• the shape of an object

Which of the following represents a chemical reaction? After a chemical change, new substances are formed with new properties.

• sugar dissolving in water

• ice cubes forming in a freezer

• melting ice cream

• frying an egg

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The pitch of sound is controlled by

• The number of the vibrations produced.

• The loudness or softness of the sound.

• The length of time that the sound lasts.

• The direction from which the sound comes.

Which of these examples would best model the behavior of light when light reaches the surface of a mirror? When a light wave strikes a surface, some of the wave will bounce off.

• A soap bubble lands on the surface of a wall and bursts.

• A piece of clay is thrown at a wall and sticks to the surface.

• A moth flies toward a wall and lands on its surface.

• A ball is thrown at a wall and bounces away from the surface.

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In an experiment sand and salt are mixed together. Which of these procedures could be used to easily separate the salt from the sand?

• Put the mixture into a pan, heat the pan for 10 minutes, let the hot mixture cool

• Spread the mixture into a thin layer, look at the mixture through a magnifying glass, separate the crystals with tweezers

• Stir the mixture into a glass of water, pour the mixture through a filter, evaporate the water

• Pour the mixture onto a piece of paper, brush the mixture into a pile, drag a magnet through the pile

A car is stuck in the mud. Three people are pushing the car, but the car is not moving. Why is the car not moving even though a force is being exerted on it?

• Cars are too large to be affected by forces.

• A force in the opposite direction balanced the push.

• The people were not strong enough to exert a force on the car.

• The force of gravity is so strong that the people cannot push hard enough to move the car.

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