Rotation
What is rotation?
The spinning of Earth on its axis
What is revolution?
Earth going around the Sun; orbit; an object going around another object
What are the 2 reasons for the seasons?
Revolution & Earth's tilt
List all of the planets in order.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
What degree is Earth tilted at?
23.5 degrees
How long does it take Earth to complete 1 rotation?
1 day or 24 hours
How long does it take Earth to complete 1 revolution?
1 year or 365.25 days
If the Northern Hemisphere is tilted toward the Sun, what season is happening?
Summer
What are the inner and outer planets made out of?
Inner=rock
Outer=gas
What keeps everything in orbit in our solar system?
Force of gravity
What does Earth's rotation cause?
Day & Night
What does Earth's revolution cause?
Seasons
Counter-clockwise
What splits the inner and outer planets?
The asteroid belt
What is the shape of Earth's orbit around the Sun?
Ellipse
In what direction does Earth rise and set?
Rises in the East and sets in the West
How does the amount of sunlight change from season to season?
Summer = direct sunlight
Winter = indirect sunlight
What is the "scientific" name of June 21 in the Northern Hemisphere
Summer Solstice
What are 2 things that all planets have in common.
They all rotate, revolve, and have gravity.
The Sun is not the biggest or brightest star in our galaxy. Why does it appear to be the biggest and brightest?
It is the closest star to Earth. The only star in our solar system.
How do the length of shadows change at different times throughout the day?
When the sun is lower in the sky=longer shadow
When the sun is higher in the sky= shorter shadow
All of the planets revolve around the Sun. Why are their revolutions different lengths?
Some planets are closer or farther from the Sun so take a shorter or longer amount of time to revolve.
If Earth's axis were tilted more than 23.5 degrees, what would the seasons look like on Earth?
More extreme seasons. Hotter in summer and colder in the winter.
Explain 3 ways in which the inner and outer planets are different.
Made of (rock or gas)
Moons (few or many)
Revolution (short or long)
Size (small or large)
Rings (none or some)
Location (close or far from sun)
Give 2 reasons as to why life cannot exist on other planets in our solar system.
Too hot, too cold, too much gravity, no atmosphere