Ariana uses balloons to investigate static electricity. Which of the following best explains what will happen when she brings two positively charged balloons close to each other?

• the balloons will move apart

• one balloon will lose its charge

• the balloons will come together

• one balloon will gain a negative charge

Tags

NGSS.MS-PS2-3

A radiometer is a device with fins that spin when light energy strikes them. A picture of a radiometer is shown below. As part of an experiment, a light source was placed 50 centimeters (cm) from a radiometer. The light source gave off four different colored lights for 30 seconds each. After each color of light was turned off, the amount of time the fins on the radiometer spun was recorded. The results are shown in the table.

Which color of light was provided the greatest amount of light energy according to the data in the table?

• red

• blue

• green

• white

Jason stretches a rubber band between his fingers, as shown. When he plucks the rubber band, it makes a sound.

Which of the following best explains why the rubber band makes a sound when Jason plucks it?

• it heats the air

• it vibrates the air

• it absorbs energy from the air

• it releases molecules into the air

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Frank uses a bowling ball to demonstrate how energy can cause changes. Which of the following actions would NOT demonstrate a change caused by applying energy to the ball.

• he holds the bowling ball in both hands

• he spins the bowling ball with one hand

• he rolls the bowling ball across the floor

• he lifts the bowling ball to place it on a shelf

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Electric circuits must be properly connected or electricity will not flow. Which of the follow shows a properly connected circuit that would allow electricity to flow and light the bulb?

• Upper left corner

• Upper right corner

• Lower left corner

• Lower right corner

Tags

NGSS.4-PS3-2

Tanisha built the circuit in the picture using a battery, insulated copper wire, and an iron nail. The iron nail has become magnetized by the battery and is attracting a metal paper clip.

Which form of energy caused this nail to become magnetized?

• mechanical

• heat

• light

• electrical

Tags

NGSS.MS-PS2-3

Light waves change speed as they travel from the Sun to Earth's surface. Which of the following causes most of this change in the speed of light waves?

• Earth's shape

• Earth's gravity

• Earth's atmosphere

• Earth's mountains

Tags

NGSS.MS-PS4-2

To make a dull coin shiny, Luca polished the coin by rubbing it with a soft cloth. When he was finished, he noticed the coin felt warmer than before he polished it. Which of the following best explains why the coin felt warmer?

• the sun is only one of the many things to give off light

• heat is produced when one object rubs another

• light is produced when one object rubs another

• some objects store more chemical energy that is given off as heat

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

When Maria plugs in and turns on her new alarm clock, the alarm sounds ringing. Which energy transformation takes place?

• electrical energy changes to solar energy

• chemical energy changes to sound energy

• electrical energy changes to sound energy

• sound energy changes to mechanical energy

How objects appear depends on the different ways in which light acts. The picture shows a straw in a glass of fruit juice.

Which of the following explains why the straw appears the way it down in the picture?

• light bounces back as it strikes a surface

• more light is taken in by dull substances than by shiny ones

• light changes to heat when it is taken in by new substances

• light bends as it passes from one substance to another

Tags

NGSS.MS-PS4-2