P2G GLOSSARY

ALL THE WORDS YOU NEED TO KNOW FOR P2G SINGLE SCIENCE, OCR BOARD - HIGHER TIER, PHYSICS

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P2g
Asteroid ­ lumps of rocks, smaller than a planet, in orbit around
the Sun.
Comet ­ lumps of ice and dust in a highly elliptical orbit around
the Sun.
Crater ­ circular depression left in surface by impact of an
asteroid.
Elliptical ­ shaped like an egg, a squashed circle.
Near-Earth object ­ comet or asteroid whose orbit crosses that
of the Earth.

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