I really want to _____ the USA to visit their national parks.
travel
An _____ is a person whose job it is to travel into outer space.
astronaut
Valentina Tereshkova is the first female ______. She went to space in 1963.
astronaut
The air that surrounds a planet.
atmosphere
_____ is the planet that we live on.
Earth
Scientists are looking for extraterrestrial life - life beyond _____.
Earth
_____ is anything that isn’t a liquid or a solid, including theair all around us.
Gas
Nitrogen ____ makes up 78 % of Earth's atmosphere.
gas
