Topic 2- Energy

Which example demonstrates the use of chemical energy?

• a ball landing

• a burning fire

• a magnet holding a picture on the refrigerator

• a marble sitting still at the bottom of a ramp

The Juno spacecraft is powered by electricity it gets by using its solar panels to convert energy from the Sun.

What forms of energy does the Sun provide for the Juno spacecraft?

• sound and light

• light and thermal

• chemical and thermal

• chemical and magnetic

When an object vibrates, causing air particles to move and vibrate, sound is produced. If the vibrations are fast, what feature of sound is heard?

• low pitch

• high pitch

• loud sound

• soft sound

The picture shows Nell's 3-minute sand timer.

Which description is best at showing that energy is at work within the timer?

• Some of the sand is in the top part of the timer

• Most of the sand is in the bottom part of the timer.

• There are a large number of grains of sand in the timer.

• Grains of sand are moving though the narrow part of the timer.

Tags

NGSS.MS-PS3-5

During math class, students were using a geoboard and a number of identical rubber bands to create geometric shapes. The rubber bands were stretched to different lengths. The students noticed that when plucked, the bands produced different sounds. Which statement explains this difference in sounds?

• The bands stretched tighter, vibrated faster, and created a higher pitch.

• The bands stretched tighter, vibrated slower, and created a higher pitch.

• The harder someone plucks a rubber band, the vibrations are slower, and the pitch is higher.

• The harder someone plucks a rubber band, the vibrations are very fast, and no sound is made.

Tags

NGSS.MS-PS4-1

LaQuisha is learning in science class about hydroelectric dams. She learns that they convert mechanical energy into electrical energy. Which of the following is the most likely source of energy for a hydroelectric dam?

• water heated by electricity

• water cooled by low temperatures

• water falling from a height

• water evaporating into the air

Johnny and his dad are traveling in a sailboat along the St. Johns River. Johnny notices that the sailboat has no engine, and wonders what is causing the boat to move.

Which of the following ideas Johnny has come up with is correct?

• Air pushes the water, and the resulting river current causes the boat to move.

• The weight of the boat's sail tilts the boat forward, causing the boat to move.

• Earth's magnetic field interacts with the metallic lining of the boat's sail, and the resulting forces causes the boat to move.

• Air moving in the atmosphere transfers its energy to the boat's sail, causing the boat to move.

Tags

NGSS.MS-PS3-5

One day, Sara bought a pinwheel at the fair. She blew into the pinwheel, and the blade rotated in a circle. What source of energy turned the pinwheel?

• heat energy

• light energy

• water energy

• wind energy

The light bulb in Connor's room has just burned out. His father come in to change the light bulb and notices that the bulb is still hot when he touches it.

What types of energy are released by the light bulb?

• light and sound energy

• heat and light energy

• mechanical and electrical energy

• heat energy and mechanical energy

A toaster uses brightly glowing coils to toast bread. The coils give off energy in the form of orange light.

What other form of energy does a toaster give off?

• magnetic energy

• heat energy

• nuclear energy

• solar energy

Tags

NGSS.MS-PS3-3