Bio Grade 8 Question Preview (ID: 42791)
Bio Grade 8.
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Mercury orbits
a) A 59 days
b) Sun 88 days
c) All
d) -
Venus
a) A 243 days
b) Sun 255 days
c) All
d) None
Mars orbit
a) A 24.5 hours
b) Sun 687 days
c) All
d) -
Jupiter orbits
a) a 9.8 hours
b) Sun 12 years 45 000 km/h
c) All
d) -
Saturn orbit
a) A 15 hours
b) Sun 29.4 years
c) All
d) -
Uranus orbit
a) A 16 hours
b) Sun 84 years
c) All
d) -
Neptune Orbit
a) A 17 hours
b) Sun 165 years
c) All
d) -
What is our milky way galaxy
a) A galaxy of massive collections of stars
b) Gas and dust held together by gravity
c) About 200 billion stars
d) All
How does the earth travel
a) Around the sun
b) The sun and our entire solar system travels around the centre of the milky wag galaxy
c) All
d) -
How long does it take the sun to orbit the galaxy
a) 225 million years
b) 230 million years
c) 100 years
d) -
How many globular clusters does the milky way have
a) estimated 130
b) estimated 160
c) none
d) -
Is the sun our closest star
a) False
b) True
c) No
d) Maybe
What is a group of stars called
a) A collection
b) A group
c) A constellation
d) None
What is famous constellation that is visible
a) The shooting star
b) The Southern cross or Crux
c) The belt
d) None
What are the 2 main stars of the system called
a) Centarui A
b) Alpha Centarui B
c) All
d) None
What is a smaller fainter star called
a) Pluto
b) Proxima Centauri
c) All
d) None
How far is the moon away
a) About 384 500 km
b) About 285 500
c) About 150 000
d) About 384 400 km away
How a far is the sun away
a) About 150 million km away
b) Closet to Pluto
c) All
d) None
What is the formula for travelling
a) Time = distance / speed
b) Speed = Time / Distance
c) Distance = Speed / Time
d) All
For distance in the solar system, what do astronomers use
a) Light hours
b) Light minutes
c) All
d) None
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