The Solar System
The sun and the objects traveling around it are...
The solar system.
What shape is earth's orbit?
Oval
The moon has no...
air
water
hydrosphere
All planets spin or....
rotate
Earth's orbit is a slightly stretched circle or..
oval.
The objects around the sun include nine...
Planets
Earth rotates on a _____ axis.
tilted
The force of attraction between the sun and earth is...
gravity.
The length of a day on earth is....
24 hours
The path of a planet is....
its orbit.
The hard outer layer of earth is the ...
lithosphere.
Gravity depends on two measures:
mass and distance.
Earth is the ____ planet from the sun.
third
Cold winters and warmer summers are caused by earth's...
tilt.
Earth is the ____ planet from the sun.
Third
The rocky surface that makes up the top of the lithosphere is the ...
crust.
How much light and warmth a planet receives depends on...
how far it is from the sun.
The hydrosphere acts like a big...
heat absorber
Any material that helps support life on earth is...
a resource.
A complete trip around the sun takes...
one year
Earth's lakes, rivers, streams, underground water, and ice is apart of the ...
hydrosphere.
What two things keep planets in their orbits?
inertia and gravity
The tendency of a moving object to keep moving in a straight line is called...
inertia
Colder winters and warmer summers are caused by...