TCBOE Science 8 Post 3

Front

How is energy modeled when a rope is moved up and down between two people?

Back

transferred through a medium.

Front

When the velocity of an ocean wave decreases as it approaches a shore, what happens to the wave?

Back

Its height increases.

Front

A student observes that a ray of light bends where it passes from glass into water. What best explains this phenomenon?

Back

The properties of a wave change as it travels from one medium into another.

Front

The diagram shows a light wave passing through the air toward an opaque piece of glass. Which statement best describes what will happen to the wave as it strikes the glass?

Back

It will reflect at an angle that is equal to the angle of incidence.

Front

Which of these types of electromagnetic radiation has the lowest frequency? Visible Light, Radio Wave, Gamma Ray, X-Ray

Back

Radio Wave

Front

Visible colors listed from shortest to longest wavelength: violet, blue, green, yellow, orange, red. Compare the frequency of these colors.

Back

Blue has a higher frequency than green.

Front

In an electric motor, electrical energy is converted into:

• mechanical energy
• chemical energy
• thermal energy
• light energy

Back

mechanical energy

Front

Which of the following does not affect the strength of an electromagnet?

• number of times the wire is looped around the core
• size of the object being attracted by the core
• type of material in the core
• amount of material in the core

Back

size of the object being attracted by the core

Front

How is energy transferred when an instant cold pack is put on a muscle injury?

Back

By conduction from the muscle to the cold pack

Front

Which of the following will absorb heat energy?

• two sticks being rubbed together
• a piece of wood burning
• steel wool rusting
• ice cubes melting

Back

ice cubes melting