Planets
Haw Many moons Does earth _________.
what is 1?
A push or pull that acts on an object.
what is Force?
The ability to do work or cause change.
what is Energy?
A mass of ice, rock and dust drifting.
what is comets?
A _______ is several food chains put together.
what is food web?
This keeps humans and other objects from flying off the planet.
what is gravity?
A force that requires 2 pieces of matter to touch
what is contact force?
Energy that is not causing any changes now but could cause changes in the future.
what is potential energy?
when a meteoroid enters the Earths atmosphere it becomes a _____.
what is meteor?
An_________is something that does not have a backbone.
what is invertebrate?
This planet's nickname is the red planet.
What is Mars?
The force that results when 2 materials rub against each other or when their contact prevents sliding.
what is Friction?
Energy due to motion.
Kinetic energy?
Name the planets in order _____________________________.
what are Mercury venus earth and Mars Jupiter saturn uranus and Neptune?
Plants produce _______ and provide food.
what is oxygen?
Name the rocky planets.
What are Mercury, Venus, Earth, and Mars?
A force that acts at a distance.
what is non-contact force?
The back -and-forth motion of an object.
what is Vibration?
Earth ________ around the sun in an elliptical orbit.
what is revolve?
There are ___bones in the adult human body
what is 206?
Jupiter does not have a solid surface, it is a
________ ____________.
What is a gas giant?
The force of attraction between any 2 objects.
what is gravity?
describes materials that let nearly all light pass through them.
what is Transparent?
Earth _____ around an imaginary line called an axis.
what is rotates?
The largest savannah is located in ______.
what is Africa?