acceleration: a change in the
When the cyclists
acceleration: a change in the
When the cyclists
asteroid: a small object made of rock or
The asteroids present in the solar system revolve around the Sun between the orbits of
atmosphere: the
The earth's atmosphere has five layers. These layers include (in order from highest to lowest altitude): the
comet: a body of
Comets are bodies of frozen gases that have
crater: a large, circular
Scientists believe the Meteor Crater in
force: a
The
gravity: a force that exists between any two objects that have
The gravity on the Earth is much
kinetic energy: the energy an object has due to its
The kinetic energy of the
The child on the swing has kinetic energy when in motion. As in a
mass: the amount of
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meteor: a streak of light in the sky that forms when a piece of
A meteor that fell on the surface of Earth some
planet: a large circular mass that revolves around a
Jupiter is the largest planet in the solar system and is composed mainly of liquid
After scientists demoted Pluto to dwarf planet, Neptune ranks as the
velocity: the
