The time an object takes to make one rotation
day length (24 hours)
What force pulled the solar system together in the Big Bang?
Gravitational force
When and what is the summer solstice?
June 21st - longest day of the year
The measure of matter in an object
Mass
How did the solar system form?
Big Bang- an explosion created matter, particles collided and formed larger clumps of matter that became galaxies, stars and planets
What is it called when the day and night are equal (12 hours each)
Equinox- happens on March 21st and September 21st
Why don['t we see a new moon?
The lit side is in the direction of the Sun, so can't be seen from Earth
Why do we see phases of the moon?
We only see the part of the moon that is reflecting the sun’s rays visible to us from our location.
When and what is the winter solstice?
Dec 21st - shortest day of the year
The earth moving around the sun
Revolution
what is a spring tide and when does it occur?
when the moon is lined up with the Earth (full and new moon positions)
Why do we measure distance in light years in space?
Distances in space are too large for our regular measurements
What type of eclipse is shown?
Lunar eclipse
A pull force based on mass and distance
Gravity
The time and object takes to make one revolution around it's orbit
year length (365 days)
What is the length of a year on the moon?
27 days
The measure of the pull of gravity on the mass of an object
weight
What is a neap tide?
when the moon is 90 degrees offset to the Sun (first and third quarter moons)
The earth spinning on it's axis
Rotation
What type of eclipse is shown?
Solar