Vocabulary
What does rotation mean?
a spinning motion (1 day)
What two factors affect gravity?
Mass and distance
What is at the center of our solar system?
The Sun
Why do we have a season?
Earth is tilted on an axis as it revolves around the Sun
Why do we have moon phases?
The Sun is always lighting up half the Moon; however, we see the different parts lit up due to our perspective.
What is revolution?
The motion of one object around another (365 days)
True or False:
Gravity keeps planets orbiting the Sun
True
How much mass does the Sun have?
99% of the mass of our solar system
What is the Summer Solstice?
-longest day of the year
- most daylight
Northern Hemisphere is tilted the most towards the Sun
What is the phase called where we only see the shadow of the moon?
New Moon
A day when Earth's rotation axis is the most towards or away from the Sun
Solstice
If there is less mass to an object, would there be a stronger or weaker gravitational pull?
Stronger
What are the inner planets in order?
Mercury
Venus
Earth
Mars
What is the Winter Solstice?
Shortest day of the year
Least daylight
Northern Hemisphere is pointed the most away from the Sun
Describe a solar eclipse
Happens during a new moon
The Moon moves between Earth and the Sun
Moon casts a shadow on Earth
A day when Earth's rotation axis is leaning along Earth's orbit
Equinox
if two objects move closer together, what happens to the gravitational force between them?
increases
True or false:
Earth is the only planet with a moon.
False
Why is it warmer near the equator?
There is more direct sunlight hitting the Earth
What are the three main types of galaxies?
spiral
elliptical
irregular
Force pulling objects together
True or false:
A star forms when the dust and gas of a nebula is pulled in by gravity until it becomes hot enough for nuclei to fuse.
True
Fill in the blank:
The planets in our solar system have ____ orbits around _____.
elliptical
The Sun
When do the equinoxes occur? What does this mean for Earth?
They occur in March and September. There are about 12 hours of daytime and nighttime everywhere on Earth
What phase is it in if the Western half of the moon is lit up? (Remember where your perspective should be!)
First Quarter