Science 7 - Analog Signals, Digital Signals & Static Study Guide

Which of the following is an example of a digital signal?

• A) Human voice in air

• B) Record player

• C) Computers

• D) Cassette tape

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NGSS.MS-PS4-3

Fill in the blank: Digital signals are more reliable to encode and transmit signals than ______ signals.

• Analog

• Electromagnetic

• Light

• Sound

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NGSS.MS-PS4-3

What is the appearance of an analog signal in diagrams?

• Block wave

• Curvy wave

• Straight line

• Zigzag line

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NGSS.MS-PS4-1

Which of the following is NOT an example of an analog signal?

• A) Human voice in air

• B) Record player

• C) Cassette tape

• D) Fiber optic cables.

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NGSS.MS-PS4-3

Fill in the blank: ______ signals use binary code (1s and 0s).

• A) Analog

• B) Digital

• C) Electromagnetic

• D) Sound

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NGSS.MS-PS4-3

What is an example of static electricity?

• Light bulb

• Rubbing a shoe on the carpet

• Fiber optic cable

• Digital photo

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NGSS.MS-PS2-3

Which of the following is a non-contact force?

• Friction

• Gravity

• Static electricity

• Magnetism

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

NGSS.MS-PS2-4

Which particle is positively charged?

• Proton

• Neutron

• Electron

• Photon

Which particle is negatively charged?

• Proton

• Neutron

• Electron

• Photon

Fill in the blank: An electrical insulator is a material that ______ the flow of electricity.

• allows

• resists

• enhances

• conducts