Matching 1
The specific temperature that a substance melts at
Melting point
One turn around an axis
Rotation
Scientists think there was once liquid water on Mars. What is the evidence that supports this?
Mars has channels that may have been created by running water.
These 2 planets have the most similar diameter.
Inner planets are rocky and not gaseous because of this.
Planets are made from metal and rock.
The pressure exerted by the weight of the atmosphere
Atmospheric pressure
One trip around another body
Revolution
The frost line is the place where ____. It is located ____.
temperatures cool down enough for gas to freeze
in the asteroid belt
This planet is the hottest.
Venus
The common factors between the inner planets are
smallest planets
dense rocky solid surfaces
inside the frost line
have atmospheres made of heavy gases
moons are rare
The trapping of heat by gases in the atmosphere
Greenhouse effect
A measure of the amount of particles in an amount of space
Density
What makes Venus the hottest planet in the solar system?
A thick layer of carbon dioxide in its atmosphere.
This is the distance from Mars to the sun.
1.524 AU
The rocket was at rest before each launch. What force acted upon it to make it fly?
My muscles pulling on the rubber band.
A small, rocky body in space
Astroid
A wobble in a planet's rotation
Axial precession
This causes Earth's axial precession.
All of the above
This is the densest planet.
Earth
What force caused the rocket to slow down and fall back to the ground?
gravity
The process leading to the formation of planets where small grains of dust and gas collide and stick together
Accretion
A rocket has more mass but goes an equal distance due to this amount of force.
More force.
Venus has a ____ rotation, probably caused by ____.
retrograde
a pair of collisions
This is the smallest planet.
Mercury
If you launch 2 rockets of different masses using the same force, how would acceleration vary?
Less mass (lighter rocket) accelerates more