Science Folder Review #1

What is the definition of reflection?

• The definition of reflection is the bouncing of light waves of of a surface.

• Reflection is the absorption of light by a surface
• Reflection is the bending of light as it passes through a medium
• Reflection is the refraction of light at an interface between two different media

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Light often reflects off of

• cardboard

• mirrors, and shiny surfaces

• cameras

• eyeglasses

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Which of the following uses mechanical energy?

• A book on a shelf
• A light bulb
• A swinging pendulum
• A stationary rock

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Which of the following produce mechanical energy?

• Computers, smartphones, televisions
• Pulleys, levers, inclined planes
• Engines, turbines, gears
• Batteries, solar panels, windmills

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Which of the following uses light energy?

• Respiration
• solar panels, Photosynthesis

• dams

• engines

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What is friction?

• Friction is the force that attracts two surfaces together.
• Friction is the force that causes objects to move smoothly.
• Friction is the force that increases the speed of objects in motion.
• Friction is the force that works against motion

What is motion?

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What is force?

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Which of the following produces thermal energy?

• Solar panels
• Wind turbines
• Hydroelectric power
• Burning fossil fuels

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What is the source of energy in a circuit?

• Battery
• Solar panel
• Wind turbine
• a switch