the most important gas in Earth's atmosphere
the last name of the first man to take a step on the moon
the planet named after the Roman goddess of love and beauty.
Venus has ___ of volcanoes on its surface.
the number of total men (all Americans!) who have walked on the moon
When the sky is dark & we cannot see the moon, we call this a __ moon.
If a person is not on a space craft, it is called an ___.
All planets have __ orbits, NOT round.
The moon does not give off light by itself, but instead reflects the light from the ___.
The ground on Mars is permanently frozen creating ____.
Earth is the ___ distance from the sun so that life can exist.
a big ball of magnetic power around Earth, placed there to protect us from dangerous particles coming from the sun
Venus is hotter than Mercury because of its thick _____.
a word used when talking about the moon
the collision of the sun's solar wind with our atmosphere, producing beautiful colors in the sky
Venus is sometimes the ___ object in the night sky.
the layer of Earth under the crust
The stuff that makes up everything around you
smooth, flat plains on the moon
Mars contains frozen carbon dioxide, creating what we call __ ice.
___ is named after the Roman god of travel.
The smelly chemical that gives Venus its yellow color is called _____.