Discover_Space

2. An Lunar Eclipse occurs when:
a) the Moon passes behind the Sun.
b) the Moon passes behind the Earth.
c) the Moon passes infront of the Earth.
d) it is a full moon.

3. A Solar Eclipse occurs when:
a) the sun passes between the Earth and the Moon.
b) it is a new moon.
c) the Moon passes through the Earth's shadow.
d) the Earth passes through the Moon's shadow.

4. To find the focal length of a lens you:
a) unfocus the image of a distant object on a wall and measure the distance from the lens to the wall.
b) focus the image of a distant object on a wall and measure the distance from the image to the wall.
c) focus the image of a distant object on a wall and measure the distance from the image to the lens.
d) focus the image of a distant object on a wall and measure the distance from the lens to the wall.

5. The details needed when observing are:
a) Location, date, time, weather and the seeing condition.
b) Location, date, time, weather and your eye site condition.
c) Location, telescope make, Time, Weather and the seeing condition.
d) Feelings, date, time, weather and the seeing condition.

6. What is the diameter of the Earth?
a) 1200km
b) 12800km
c) 12500km
d) 2800km

7. How long does it take for the Earth to orbit the Sun?
a) 325 days
b) 325.25 days
c) 325.50 days
d) 325.75 days

8. What is the Earth's path around the Sun called?
a) Circle
b) Spherical
c) Elliptical
d) Round

9. How fast do radio waves travel?
a) Speed of light
b) 30000000 m/s
c) Speed of sound
d) 30000000000 m/s

10. What is the shape of a raidio telescope?
a) Transbolic
b) Circular
c) Spherical
d) Parabolic

11. How many lenses are refracting telescopes made with?
a) 1
b) 2
c) 3
d) 4

12. How do you work out the total length of a refracting telescope?
a) You add the width of the objective lens to the width of the eye piece lens.
b) You take away the focal length of the objective lens from the focal length of the eye piece lens.
c) You add the focal length of the objective lens to the focal length of the eye piece lens.
d) You take away the width of the objective lens from the width of the eye piece lens.

13. What is an Astronomical Unit?
a) The average distance between the center of the Sun and the center of the Earth.
b) The pricise distance between the center of the Sun and the center of the Earth.
c) The average distance between the center of the Moon and the center of the Earth.
d) The average distance between the center of the closest galaxy to us and the center of our galaxy.