Surface of the Moon

Q.

Sam's father and mother are astronauts. Last month they returned from a tour to the Moon. Sam's father told him that they had air filled helmets and they also had microphones, which they used for talking to each other. Why did they use microphones to talk even after they were close enough to hear the sound of each other?

1. There was too much noise on the moon

2. There is no air on the moon

3. His father's voice was too low because he got choked due to poisonous gases of the moon

4. Both A & C

Q. There is no ___ on the moon.

1. atmosphere
2. gravity
3. sound
4. craters

Q.

Sound wave is a mechanical wave, which means, unlike light, it needs a medium to travel.

1. True

2. False

Q. When Kavita Krishnamurty said that her first recording went without a hitch, she meant that

1. It went off smoothly
2. There were frequent interruptions.
3. There were some retakes
4. It went off as anticipated.

Q.

What are the dark spots on the Sun that appear in 11-year cycles called?

1. Thrusters

2. Sunspots

3. Water Vapor

4. Aerobic

Q.

A meteor starts burning when it enters Earth's atmosphere. Which of the following correctly explains this?

1. Electrostatic force produces heat.

2. Frictional force produces heat.

3. Magnetic force produces heat.

4. Gravitational force produces heat.