MSTEP Review

Chris left a glass of water on a windowsill. When he looked at the glass a few days later, some of the water had evaporated.  Which of the following best describes what happened to the particles of water that evaporated?

• They became larger in size.

• They spread out into the air.

• They were absorbed by the glass.

• They passed through the glass into the air.

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Jose has two bar magnets. He pushes the ends of the two magnets together and then he lets go. The magnets move quickly apart. Which of the following statements best explains why this happens?

•   The north poles of the two magnets are facing each other.

•   One magnet is a north pole and one magnet is a south pole.

•   The ends of magnets repel each other but the centers attract.

•   One magnet is storing energy and one magnet is releasing energy.

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Francis plugged a toaster into an electric outlet. He put a piece of bread in the toaster and turned the toaster on. While the toaster was on, it changed the electrical energy from the outlet into other forms of energy.  Which form of energy toasted the bread?

• Chemical

• Heat

• Magnetic

• Sound

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Which of the following metals will be attracted to a magnet?

• Copper

• Gold

• Iron

• Silver

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A student hears the sound of a bell. Which of the following carries the sound of the bell to the student?

• Electrical currents

• Magnetic signals

• Radio waves

• Vibrating air

Which of the following statements best describes a complex machine?

• It is designed to move with a motor.

• It is constructed from machine-made parts.

•   It is made of more than one simple machine.

• It is built from more than one type of material.

Andrea has a wooden board that is 3 m long, as shown below. Which of the following pairs of tools would be best for Andrea to use to cut the board into three pieces of equal length?

• A saw and an ax

• An ax and a hammer

• A tape measure and a saw

• A hammer and a tape measure

The tongs work as which of the following simple machines?

• Inclined plane

• Lever

• Pulley

• Wedge

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Rachel purchased a kit for making a skateboard ramp. Which of the following is most important to have for putting the ramp together?

•   A picture showing the colors of different ramp parts

•   A diagram showing some ways to use the ramp

•   A list of prices for other available kits

•   A set of instructions for the kit materials

Lyle is planning to buy a microwave oven. He will put it in his kitchen in the space labeled in the diagram below. In order to be sure he can put the microwave oven in the space in the kitchen, which of the following questions should Lyle ask before buying the microwave oven?

• Is the microwave oven powered by electricity?

•   Does the microwave oven have an automatic timer?

•   What are the measurements of the microwave oven?

•   How many power levels does the microwave oven have?