8. a) List the planets in our solar system, in order starting from the sun:
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
b) The two planets in our solar system with no moons are Mercury and Venus
9. a) A(n) Meteor is also known as a shooting star. If it does not completely
vapourize in the atmosphere and hits the Earth it is called a(n) Meteorite.
b) A(n) Comet is also known as a dirty snowball composed of frozen gas,
ice, rocks and dust.
10. The process that produces energy in the sun is called Nuclear Fusion.
This process occurs in the core of the sun. Describe this process in a sentence
below. Two hydrogen atoms fuse to form a helium atom.
11.Complete the table below:
Star Colour
A
B
C
White
Yellow
Blue
Surface
Mass
Temperature (Compared
to our sun
(C)
which = 1)
10 000
10
5800
1.2
40 000
35
Luminosity Approximate
(Compared Age (Years)
to our sun
which =1)
80
40 million
1.1
7 billion
200 000
1 million
(a) The star most like our sun is B.
(b) The star most likely to form a black hole is C.
(c) The star most likely to form a neutron star when it dies is A.
12. Convert the following into scientific notation:
(a) 380 000 000 000 m = 3.8 X 1011m
(b) 0.000 000 451 s = 4.51 X 10-7 s
13. Convert the following into standard form:
(a) 3.00 x 108 m/s = 3 00 000 000 m/s
(b) 6.5 x 10-8 kg = 0.000000065 kg
14. Convert the following distances:
(d) 2.67 light years = 3.00 x 105 km/s x (2.67 x 365 x 24 x 60 x 60)s =?
(e) 3.6 light years = 3.00 x 105 km/s x (3.6 x 365 x 24 x 60 x 60) s =?
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