Astronomy

Question 1

Order of planets

Answer 1

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

Question 2

Moons

Answer 2

Natural satellites that orbit a planet

Question 3

Dwarf planets

Answer 3

Planet with a low field of gravity - small.

Question 4

Asteroids and comets

Answer 4

Asteroids - Flying balls of metals and rock

Comets - Flying balls of ice, dust and rocks

Question 5

Weight equation

Answer 5

Weight (N) = Mass (KG) x Gravity (N/KG)

Question 6

Gravity on earth

Answer 6

9.8N/KG

Question 7

Sun centric model of the universe

Answer 7

Copernicus (1473 - 1543) thought the sun was at the centre of the solar system.

Question 8

Earth Centric Model

Answer 8

Ptolemy thought the earth was at the centre of the universe, descriptions had to get very complex to keep the earth at the centre.

Question 9

Orbit speeds

Answer 9

At speeds of 7600m/s objects go into orbit

At speeds of 11,200m/s objects leave the earths orbit

At speeds slower than 7600m/s objects fall back to earth.

Question 10

Types of artificial orbit

Answer 10

Polar orbits - Polar orbits go over the earths poles so they must travel at very high speeds. They take 24h to orbit the earth so it appears to remain in the same part of the sky when observed from the ground

Geostationary orbits - Orbiting at the same rate as the planet. Has a period of 24hrs