Page 127 - DK Children's Encyclopedia
P. 127
Gravity SEE ALSO
▸ ▸ Forces p.108
▸ ▸ Gases p.117
Gravity is an invisible force that pulls us back down ▸ ▸ Measuring p.159
toward Earth when we jump in the air. If we throw a ▸ ▸ Moon p.171
ball up it comes down because of gravity. Without it, ▸ ▸ Solar system
we would float off into space. p.233
▸ ▸ Sun p.247
Falling to Earth
Earth’s gravity pulls things
toward it. When a skydiver jumps
out of a plane, gravity starts to
pull him down. Eventually he will
use a parachute to slow his fall.
Air pushes up on the
skydiver as he falls. Gravity pulls the
skydiver down
toward Earth.
Earth
The moon moves
around the Earth.
Moon
Newton came up
with the theory of
Isaac Newton gravity after Earth and moon
Scientist Isaac Newton watching apples The strong pull of Earth’s gravity keeps
fall from a tree.
realized there was a pattern the moon moving around it. Without
behind objects falling gravity, the moon would disappear
toward Earth. into space.
125
US_125_Gravity.indd 125 16/05/2017 10:52
