Galaxies and the Solar System Stuff
Spiral
Another name for Mercury, Venus, Earth and Mars, which describes their physical characteristics
The distance from the Earth to the Sun
AU/Astronomical Unit
Tides are caused by:
gravity of the moon and sun
The Earth's tilt is what?
23.5 degrees
This type of galaxy contains mostly older stars and has little to no star formation happening.
Elliptical
This is the process that formed the planets in our solar system
Accretion
The motion of a body orbiting another body in space is called _____.
Revolution
The moon's orbital tilt
The equator experiences _____________ which is why the effects of the the seasons are less than in other places
direct sunlight
A streak of light passing through Earth's atmosphere that hits the ground upon descent through the atmosphere
Meteorite
The lunar cycle is approximately how many days?
29
Draw a diagram of what the Earth, Moon and Sun look like during a total lunar eclipse
Moon Earth Sun
How often do spring tides occur and what moon phases are responsible for the increase in tides?
Every 14 days; full and new moons
If it is summer in the northern hemisphere it is ___________ in the southern hemisphere
Winter
Mars and Jupiter
When the amount of the lighted surface of the Moon that is visible from Earth is decreasing, the Moon is:
Waning
How long does it take for the Earth to make one revolution?
365 days/1 year
These lunar phases produce lower high tides and higher low tides, which are also known as what?
1st and 3rd quarter moons; neap tides
March 21st
In order for a star to form, this process must happen
Nuclear Fusion
This is the reason for the different causes of the moon phases
How much of the lit portion we can see from Earth/moons position in the sky relative to Earth
The farther a planet is from the Sun, the _______ the gravitational force between them and the _______ the planet's orbital speed.
weaker; slower
If you are experiencing a total solar eclipse, where must you be standing in regards to the eclipse?
Within the umbra (total shadow)
What are the two things responsible for seasons
Earth's tilt and its position around the sun