Earth
This causes the Earth's seasons.
What is the tilt of the Earth and/or the revolution of the Earth around the Sun?
The sun is a big fiery ball of gas called this.
What is a "star"?
It takes this long for the moon to revolve completely around the Earth.
What is one month?
Diurnal animals use mostly this one of the five senses.
What is sight?
This causes day and night.
What is the rotation of the Earth on its axis?
The Sun is this many times farther away from the Earth than the Moon.
What is "400"?
During this phase of the moon, it appears like a sliver or toenail.
What is a "crescent moon"?
Many nocturnal animals do not see these.
What are "colours"?
This day of the year has the shortest number of daylight hours (the shortest day of the year).
What is the "winter solstice" on Dec 21st?
During this phase of the moon, we can see no sunlight reflecting off the face of the moon.
What is a "new moon"?
As we see less and less of the lit part of the moon, we say that it is doing this.
What is "waning"?
When an animal creates its own light to help it see and scare away predators.
What is "bioluminescence"?
When it is winter in the Northern hemisphere, it is this season in the Southern hemisphere.
What is "summer"?
The sun appears higher in the sky during this season because of the tilt of the earth.
What is "summer"?
This is when an animal makes a high pitched sound that bounces back to help it "see" in the dark.
What is "echolocation"?
A solar eclipse is darkest if you are standing in this part of the Moon's shadow.
What is the "umbra"?
The moon's gravity affects this part of the Earth, changing it daily on our beaches.
What are "ocean tides"?
This term describes when one of an animal's ears is lower than the other.
What is "asymmetrical hearing"?