Space

Question 1

What speed must you be at to escape the earths orbit

Answer 1

11,200 m/s

Question 2

What speed must you be at to orbit the earth

Answer 2

7,600 m/s

Question 3

centripetal force

Answer 3

Force, needed for circular motion, which acts towards the center of a circle.

Question 4

What is the technical term for moons

Answer 4

Natural satlitlites

Question 5

Dwarf planet

Answer 5

An objecting orbiting a star that is massive enough to be rounded by its own gravity but has not cleared the neighbourhood of other objects and is not a satellite.

Question 6

Satellite

Answer 6

A body that orbits a planet. For example, the moon is a natural satellite of the Earth but communication satellites are artificial satellites of the earth.

Question 7

asteroid

Answer 7

A rock in space. Asteroids orbit the Sun but some may cross the Earths orbit, producing a risk of collision.

Question 8

Elliptical

Answer 8

Shaped like an ellipse. Oval or egg-shaped

Question 9

Comets

Answer 9

A ball of icy rock that follows an elliptical orbit around the sun

Question 10

What happens when a comet approaches the sun

Answer 10

It vaporises, meaning it turns into a gas and produces a distinctive tail

Question 11

A stable orbit

Answer 11

Is one which the satellite’s speed is just right - it will not move off into space or spiral into the Earth will travel around a fixed path.

Question 12

polar orbits

Answer 12

Polar orbits take the satellites over the Earth’s poles. The satellites travel very close to the earth as a low as 200k above sea level. They travel at almost 8000m/s

Question 13

Geostationary orbits

Answer 13

Take 24 hours to orbit the earth, so satellite appears to remain in the same part of the sky when viewed from the ground. These orbits are much higher than polar orbits. (Typically 36,000km) So the satellite’s travel more slowly around (3000m/s)