This is the fastest speed possible, some 300 000 km/s.
What is the speed of light?
100
This causes the seasons.
What is the Earth's tilt?
100
This is the phase of the moon where the moon is the largest in the night's sky.
What is the Full Moon?
100
Only on these two days of the year are day and night the same length, no matter where you are in the world.
What are the Spring and Fall equinox?
100
This is the darkest part of the shadow cast by an object.
What is the umbra?
200
All over the world, people cheer up when they see rainbows.
Rainbows are an example of this property of light.
What is "White light is made up from all different colours".
200
This is the day when the days are longest in the Northern Hemisphere.
What is June 21st or the Summer Solstice?
200
This is the phase of the moon just after the Full Moon, where we see most of the moon with just a sliver of darkness.
What is waning gibbous?
200
23 degrees
What is the angle of the Earth's tilt?
200
This is the order of alignment of the Earth, Sun, and moon during a solar eclipse.
What is Sun - Moon - Earth
300
When the sadistic neighbourhood bully burns ants using a magnifying glass, they are demonstrating this property of light.
What is "Light energy can transform into thermal energy"?
300
This is the longest day of the year in the southern hemisphere.
What is December 21st or the Winter Solstice?
300
This is the phase of the moon just after the new moon, when we see a small crescent of light on the edge of the moon's surface.
What is waxing crescent?
300
When the North Pole is tilted away from the Sun, it is this season in Australia.
What is summer?
300
If a person is standing inside of this, they will see a partial eclipse.
What is the penumbra?
400
Professional photographers will often hold up a large white board beside the person they are photographing in order to get more light shone on their subject.
What is "Light can be reflected or absorbed by any object"?
400
This is the reason why winter is colder than summer.
What is the angle of the sun's rays?
400
This is the phase of the moon that appears in between the waning gibbous and waning crescent moons.
What is the last quarter moon?
400
When the North Pole is tilted towards the Sun, it is this season in Australia.
What is winter?
400
During a solar eclipse the moon is in this phase.
What is the New Moon phase?
500
When you look down on the ground on a sunny day, you see a shadow that is in the same shape as your body.
This is because of this property of light.
What is that light travels in a straight line?
500
This movement of the Earth causes the North pole to be pointed towards the Sun for part of the year and pointed away from the Sun for the other part of the year.
What is the revolution of the Earth?
500
This is the phase of the moon that appears between the waxing crescent and the waxing gibbous moon.
What is the first quarter moon?
500
The Sun appears to travel from East to West in our sky because the earth is rotating in this direction.
What is counterclockwise?
500
This property of the moon's orbit around the Earth results in there not being a lunar eclipse every Full Moon.
What is the fact that the moon's orbit is tilted with respect to the Earth's revolution around the Sun.