Topic 6 Science Test 8th Grade

What elements are stars made of?

• h202

• gas

• hydrogen and helium

• water and gas

How often does halleys comet pass earth?

• Every 88 years

• Every 75 years

• Every 21 years

• Every 1500 years

How many constellations are there?

• 88

• 85

• 84

• 72

Stars appear to move from____ to ____

• east to south

• South to north

• East to West

• Northeast to southwest

When was the last appearance of Halley's Comet?

• 1818

• 1891

• 1986

• 1976

When will Halley's comet appear next?

• 2023

• 2061

• 2079

• 2034

What is earths only natural satellite?

• The Moon

• The stars

• Mars

• Jupiter

What is the imaginary line that passes from the N pole through the Earths center to the S pole?

• Equator

• Axis

• Gravity

• Saturn

What is the length of Earths rotation?

• 24 hours

• 365 days

What is the length of earth's revolution?

• 24 hours

• 365 days