Earth In Space
Ancient people developed the Year how?
One revelution around the sun is one year- 365 days.
True or False: The Northern and Southern Hemispheres are opposite.
True.
When we experience winter, they have summer.
Force
push or pull of objects
the force of gravity decreases quickly as distance _____
increases
If someone saw a partial solar eclipses they would in the _________
Penumbra - the less dark shadow (part of the sun is still visable.
How did ancient people develop the month.
They saw the moon change phases, one month is one full moon to another, which is 29 days.
Orbit
The Earth's path around the sun
Inertia
an objects tendency to resist change in motion
Is the same side of the moon always facing Earth? Why?
The same side of the moon always faces Earth because it takes the moon 1 day to rotate on it's axis which is the exact same as the Earth.
What happens when the moon is in Earths umbra?
Total Lunar Eclipses
How did ancient people develop the day?
One day 24 hours, one rotation of the earth on its axis.
Axis
Imaginary line that passes through the poles
Newtons first law of motion
an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force.
Explain the near side and far side of the moon.
Near side - side of the moon facing Earth
Far side - side of the moon facing away from Earth
Explain the Moon's phases in order
New moon, waxing cresent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, waning cresent.
Revelution
The movement of one object around another.
Soltace vs. Equinox
Equinox - the noon soon is directly overheard at the equator.
What is Newtons Law of Universal Gravitation?
Newtons Law of Universal Gravitation: every object in the universe attracts every other object
Mass
The amount of matter in an object
A person who sees a total solar eclipse would have to be in the moons ______
Umbra - very darkest part of the moons shadow
Rotation
Spinning of Earth on it's axis.
What causes the Earths seasons, and where on Earth do they have 4 seasons? Why?
The Earth's seasons are caused by Earths tilt (23.5).
The poles are always cold (they get indirect sunlight)
The equator is always warm with direct sunlight.
Areas between poles and equator get 4 seasons.
What is Gravity and what 3 things effect the strength of gravity?
Gravity - attracts all objects towards each other.
Three things that effect gravity are:mass, distance and weight.
What keeps objects in orbit?
Gravity and Inertia
What are the two types of eclipses? Explain them.
Lunar - Earth is between a full moon and the sun