Space

Question 1

Definition of a satellite

Answer 1

A moon, planet or machine that orbits a planet or star

Question 2

Difficulties travelling through space? X3

Answer 2

• Travelling large distances
• Manoeuvering In zero friction
• maintaining sufficient energy to operate life support systems

Question 3

Solutions for travelling large distances in space?

Answer 3

Attaining a high velocity by using an ion drive (producing a small unbalanced force over a extended period of time) or using a ‘catapult’ from a fast moving asteroid, moon or planet

Question 4

Solutions for maintaining sufficient energy to operate life support systems?

Answer 4

Use solar cells with area that varies with distance from the sun.

Question 5

Where does a geostationary satellite need to be placed?

Answer 5

With a period of 24hrs and an altitude of 36,000km

Question 6

The period of a a satellite in a high altitude orbit is ________ than the period of a satellite in a lower altitude orbit.

Answer 6

Greater

Question 7

Risks of space travel 5x

Answer 7

• fuel load on take off
• potential exposure to radiation
• pressure differential
• re-entry through an atmosphere
• extreme temperatures

Question 8

Approximately how old is the universe?

Answer 8

13.7 billion years old

Question 9

The Big Bang theory

Answer 9

Approximately 13.7 billion years ago the universe came into existence as a singularity and rapidly expanded from an extremely hot dense state and is still expanding today.

Question 10

Which type of electromagnetic wave does an optical telescope use?

Answer 10

Visible light, can only be used on a clear night

Question 11

Which type of electromagnetic wave does radio telescopes use?

Answer 11

Radio waves, which can be used in bad weather and in day and night.

Question 12

Why do infrared, x-rays and gamma ray detecting telescopes need to be placed in orbit around the earth?

Answer 12

Infrared, X-rays and gamma rays are blocked by the earth’s atmosphere