Types of Energy

Which scenario is an example of chemical energy in action?

• a car rolling down a hill

• a candle burning

• a paperclip attached to a magnet

• a book resting on a table

What types of energy does the Sun provide to power the Juno spacecraft's solar panels?

• light and sound

• heat and light

• magnetic and chemical

• heat and chemical

Which of the following scenarios best illustrates the concept of mechanical energy?

• observing a windmill turning as the wind blows

• seeing a light bulb glow when switched on

• hearing the sound of thunder after a lightning strike

• feeling the warmth of the sun on your skin

When a person looks into a mirror, what happens to the light rays that enable the person to see their reflection?

• The light rays are refracted by the mirror.

• The light rays are blocked by the mirror.

• The light rays are reflected by the mirror.

• The light rays are absorbed by the mirror.

During a science experiment, students used a set of identical strings to create musical notes. The strings were stretched to various tensions. The students observed that when plucked, the strings emitted different pitches. Which statement best explains this variation in pitch?

• The strings stretched tighter, vibrated faster, and produced a higher pitch.

• The strings stretched tighter, vibrated slower, and produced a higher pitch.

• The more forcefully a string is plucked, the slower it vibrates, resulting in a higher pitch.

• The more forcefully a string is plucked, the faster it vibrates, resulting in no sound.

Jayden uses friction to start a fire by rubbing two sticks together. What is the main reason this method works?

• The friction causes the sticks to vibrate intensely, igniting the fire.

• The friction generates enough heat energy to ignite the fire.

• The friction releases electrical energy, which starts the fire.

• The friction produces light energy, which ignites the fire.

When does light stop traveling in a straight line?

• when it becomes brighter

• when it strikes an object

• when it moves through air

• when it passes through space

Faith notices that when she wears a black hat on a sunny day, her head feels warm. She switches to a white hat and her head feels cooler. What is the reason for this difference?

• The black hat reflects more sunlight.

• The black hat refracts more sunlight.

• The black hat absorbs more sunlight.

• The black hat produces more sunlight.

9. Light can be refracted. Which of the following scenarios demonstrates the refraction of light?

• A pencil appearing bent when placed in a glass of water.

• Seeing your reflection in a pond.

• Hearing thunder after a lightning strike.

• Feeling the heat from a campfire.

When Jett uses his phone throughout the day, what type of energy is stored in the battery to keep it running? SC.4.P.10.3

• electrical and light

• electrical and chemical

• chemical and sound

• light and sound