Help this is a test!! 50 points and brainliest. 2. Which is NOT used for person to person communication?
A. microwaves
B. Ultraviolet rays
C. Radio waves

3. A single beam of light is shone into a glass containing water. Which statement BEST describes why the beam of light bends downward?
A. The water blocks the passage of light through the glass.
B. The light is moving from air into another medium.
C. The force of gravity affects light more when it is in a liquid.
D. The farther light is from its source, the slower it moves.

4. What happens to a ray of white light when it passes through a prism?
A. The ray of light is combined into a single color.
B. The ray of light is completely absorbed by the prism.
C. The ray of light is bent backward toward the source of light.
D. The ray of light is bent in several pathways showing a rainbow.

5. Which of the following gives the best explanation of why we can’t hear sound in space.
A. The particles in space are too far apart to bounce off one another, so no sound waves can form.
B. The particles in space are too close together to bounce off one another, so no sound waves can form.
C. There are no particles in space, meaning there is no medium for sound to travel through.
D. There are too many particles in space, meaning there are too many mediums for a single sound wave to travel through.

8. Which of the following best explains why sound is able to be carried from one room to another in your home?
A. As the sound waves pass through a doorway, they are diffracted around the barrier and spread back out into the next room.
B. As the sound waves pass through a doorway, they are reflected off the sides of the doorway and bounce into the next room.
C. As the sound waves pass through a doorway, they are absorbed by the barrier and re-distributed into the next room.
D. As the sound waves pass through a doorway, they are refracted through the doorway and spread back out into the next room.

9. Which of the following types of waves have the greatest amount of energy?
A. radio waves
B. visible light
C. gamma rays
D. x-rays

10. Which of the following would correctly describe what tires on a vehicle do concerning light waves?
A. Tires reflect light waves because they are black and black is a reflection of all the colors of the visible light spectrum.
B. Tires absorb light waves because they are black and black absorbs all the colors of the visible light spectrum.
C. Tires transmit light waves because they are not a source of light, so they have to transmit the light from the light source that hits them.
D. Tires refract light waves because they are a solid, and when the light waves go from solid to air they refract and bend.

11. pitch sounds carry farther than pitch sounds.
A. high; low
B. low; high

12. is made up of all the wavelengths of visible light.
A. Black
B. White
C. Red
D. Violet

13. Which of the following explains why you are unable to see trees and other objects outside your house at night when there is no light?
A. The trees and other objects are not a source of light, so they are unable to be seen at all.
B. The trees and other objects are not a source of light, so they are unable to be seen unless light waves from another light source reflect off them and into our eyes.
C. The trees and other objects are a poor source of light, so they are unable to be seen without another light source reflecting off their light and into our eyes.
D. The trees and other objects are a poor source of light, so they are unable to be seen without another light source refracting through a prism and separating their colors.

14. Which is an example of an electromagnetic wave?
A. a flag waving in the wind
B. a vibrating guitar string
C. the changes in the air that result from blowing a horn
D. the waves that heat a cup of water in a microwave oven

15. Which of the following best explains why a pencil looks bent when placed in a glass of water?
A. Diffraction causes the light waves to move as they pass from one medium to another.
B. Reflection causes the light waves to bounce off the glass and look bent.
C. Refraction causes the light waves to change speed and direction as they pass from one medium to another.
D. Absorption causes the light waves to be absorbed by the water and appear bent.