8th Grade Science Review

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It consists of a coil of wire, often wrapped around a core material, that becomes magnetized when electricity flows through it.

Front

How can you increase the strength of an electromagnet?

Back

You can increase the strength of an electromagnet by increasing the number of coils of wire, using a stronger battery, or using a ferromagnetic core.

Front

What does Newton's Third Law of Motion state?

Back

Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction.

Tags

NGSS.MS-PS2-1

Front

What is evolution in biological terms?

Back

Evolution is the process through which species change over time through variations and natural selection, leading to the development of new species.

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Front

What is atmospheric oxygen's role in the evolution of life?

Back

Atmospheric oxygen is crucial for the survival of aerobic organisms and played a significant role in the evolution of complex life forms.

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Front

What is a wave in physics?

Back

A wave is a disturbance that transfers energy from one place to another without transferring matter. Waves can be mechanical (requiring a medium) or electromagnetic (traveling through a vacuum).

Tags

NGSS.HS-PS4-1

Front

What is the difference between analog and digital signals?

Back

Analog signals are continuous waves that vary in amplitude or frequency, while digital signals are discrete and represent data in binary form (0s and 1s).

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NGSS.MS-PS4-3

Front

What is wavelength in relation to waves?

Back

Wavelength is the distance between successive crests (or troughs) of a wave. It is inversely related to frequency.

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NGSS.MS-PS4-1

Front

What is frequency in physics?

Back

Frequency is the number of waves that pass a given point in one second, measured in hertz (Hz). Higher frequency means shorter wavelength.

Front

What is a ferromagnetic material?

Back

Ferromagnetic materials are substances that can be magnetized; they have a high magnetic permeability and retain their magnetism after the external magnetic field is removed.

Tags

NGSS.MS-PS2-3