About Earth
Gravity
water
dry places
thunder and lightning
wind
earthquakes and volcanoes
gravity is the force that pulls us to the ground
gravity was discovered by sir Isaac newton when he was siting under a apple tree
without gravity on earth we would float away
earth's moon also has gravity but not as much as earth that's why astronauts on the moon walked with big floaty steps
there is a huge amount of water on earth
over 70% percent of earth is covered with water
why is the sea salty
lots of salt from the sea used to come from rocks on land
the water runs over the rocks & takes the salt into the water making the sea more salty
the dead sea is so salty that you can float without even trying
most of earth's water has salt in it
Antarctica is the driest place on earth
Antarctica's dry valleys are so cold that nothing can survive there
the Sahara and the Atacama desert are very hot
even though the Atacama desert is hot animals still live there
sand
water can slowly break down rock over time
dunes
sand grains are hard cause they used to be rock
low hills of sand are called dunes
wind can move sand dunes
sky
why is the sky blue
at evening the sunset looks like pink, red, and orange
the color of the sky is all the colors of the rainbow and just sheds the blue color
when it rains the sun's light shines through the raindrops
at sunset, the sun only shows the hot colors
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thunderstorms happen a lot in summer and spring
lightning doesn't often hit the ground
lightning usually hits trees and buildings
thunder is a sound that rumbles a lot
warm air goes up
cold air goes down
lots of earths winds come in from the sea
the fire in hot air balloons is hot which makes it go up
lava is what they call magma above ground
lava is very hot
the Cypress freeway got destroyed when earthquake 1918 Loma prieta
lava underneath earth is called magma