8th Science TN Ready Review

Front

What is a generator?

Back

A device that converts mechanical energy into electrical energy.

Front

What is electromagnetic induction?

Back

The process of generating electric current from a changing magnetic field.

Front

What is the relationship between mass and acceleration when force is constant?

Back

If mass is doubled, acceleration is cut in half.

Front

What does it mean if a star is red shifted?

Back

It indicates that the star is moving away from the observer, causing its light to shift to longer wavelengths.

Front

How can you strengthen an electromagnet?

Back

By adding more coils of wire to the core.

Front

What is the shortest wavelength wave among electromagnetic waves?

Back

Gamma rays have the shortest wavelength.

Front

What is the formula for calculating force?

Back

Force = Mass x Acceleration (F = m*a).

Front

What is the principle of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.

Front

What is the difference between a motor and a generator?

Back

A motor converts electrical energy into mechanical energy, while a generator converts mechanical energy into electrical energy.

Front

What is the speed of light in a vacuum?

Back

Approximately 299,792 kilometers per second (km/s).