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Science solar system unit test
Terms in this set (19)
A small, rocke object orbiting the sun. Thousands of asteroids exist in an area called the asteroid beld, between Mars and Jupiter.
a person who studies all the things in the universe beyond Earth
A small, icy object that orbits the Sun. The centre, or nucleus, of a comet is a ballof ice and dust. A tail of gas and dust spreads away from the comet when it approaches the Sun, making it visible to the naked eye.
A bowl-shaped hollow on teh surface of a planet, moon or asteroid. Many craters are caused by the impact of a meteorite or an asteroid.
A pulling force that acts between all objects in the universe. The Moon is attracted to the Earth by gravity.
Something that relates to the Moon. For example, lunar rock.
Dust or a small chunk of rock which orbits the Sun. A meteroid that travels through Earth's atmosphere becomes a meteor. A meteor that hits the Earth's surface is called a meteorite.
the ball of rock which orbits the Earth; Earth's only natural satellite.
The path of one object as it revolves around another object.
To move around an object. For example, the Earth revolves in a near circle around the Sun.
To spin around a centre point. For example, the Earth rotates on its axis.
A small object in space that orbits something larger. Human-made satelits are launched into space to study the Earth and other planets.
Something that relates to the Sun. For example, a solar eclipse.
The Sun and all the objects that orbit it.
A large ball of gas that gives off light and heat because of nuclear reations deep inside it.
The only star in the solar system
An instrument that collects light and other forms of energy from distant objects
The work used to describe all of space and everything in it, including the stars, the solar systemn and other galaxies
a cluster of stars, dust and gases held together by gravity
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