Vocab
To travel in a path around something else
What is revolve?
This is a layer of gases that surrounds a planet (like Earth)
What is an atmosphere?
True or false: The Moon produces its own light
What is FALSE
The Sun is this type of space object.
What is a star?
A natural, rocky or icy object that revolves around a planet
What is a moon?
Earth's surface is mostly ________, with a great variety of landforms.
What is hard and rocky?
What is, by sending spacecrafts to explore it?
The two gases that the Sun is composed mainly of.
What are hydrogen and helium?
To spin
What is rotate?
Earth ______ and ________ around the Sun
What is rotates and revolves?
Between 1969 and 1972, this many astronauts have walked on the moon.
What is 12?
This is why it is unsafe to look directly at the Sun
What is, because it gives off so much energy
An enormous ball of extremely hot, glowing gases
What is a star?
These are the two gases that make up most of Earth's atmosphere
What are nitrogen (78%) and oxygen (21%)?
This is a small chunk of rock or metal from space that strikes the surface of the moon
What is a meteorite?
Compared to other stars, the Sun is of __________ size and __________ brightness
What is medium size and average brightness?
Bowl-shaped landforms
What are craters?
What are the 3 conditions on Earth that support living things?
1. Earth's atmosphere (oxygen)
2. Distance from the sun
3. Liquid water, not just ice
What are the 3 main ways that the Moon is different from the Earth?
1. Moon has no liquid water
2. Moon has almost no atmosphere
3. The Moon's temperatures are much hotter and much colder
The Sun's energy powers these 3 things on Earth (not including maintaining temperature)
1. Earth's winds
2. Ocean currents
3. Water cycle