Gravity
What is gravity?
The force that makes things fall-force of attraction between two bodies that have mass.
The measure of the force of gravity on an object, usually measure in Newtons...
Weight
The lunar cycle is approximately how many days?
29 days
Who was the first human to step onto the moon?
Neil Armstrong
What does the moon and sun gravity cause?
Tides
As far as we know, this planet is the only planet that can sustain life.
Earth
There are ____ phases of the moon.
8
24
What space agency launched the Hubble Space Telescope in 1990?
NASA
What forces keeps planets in orbit around the sun?
Gravity
What is the Imaginary line that divides Earth into the Northern and Southern Hemispheres?
Equator
Increasing light reflected on the moon is considered ___________.
Waxing
Earth _______ around the sun.
Revolves
Analyze the surface of moons and planets.
What factor does the force of gravity depend on?
Mass or Distance
During which season is the Northern Hemisphere tilted away from the Sun
Winter
Decreasing light reflected on the moon is considered ___________.
Waning.
How long does it take for the Earth to Revolve around the sun?
365 Days
What is the primary source of energy for Earth?
Solar radiation from the sun.
What happens to the force of gravity between two objects if the distance between them increases?
During an equinox, what is the position of Earth's axis in relation to the sun?
Perpendicular to the Sun
A ________ moon is the start of the lunar cycle.
NEW
Tilt and revolution
What does NASA stand for?
National Aeronautics and Space Administration.