Solar System
List the planets in order from the sun to the edge of the solar system
mercury, venus, earth, mars, jupiter, saturn, uranus, neptune
Describe the core of the sun.
small and dense, like a rubber ball.
The universe contains billions of ________ that contain billions of _______
galaxies, stars
Explain why NASA has not sent astronauts to Jupiter
it is too far to get there and back safely
When distance between objects increases, gravity _________.
decreases.
This planet experiences the greatest gravitational pull from the sun
mercury, cuz its closest
list the star colors from coolest to hottest
red, orange, yellow, white, blue
The milky way is of many ______ in the ______
galaxies, universe
Explain how the planets formed
The sun's gravity pulled rock and other debris together to form the planets
What happens to hot gases after they rise and cool
they sink back down
Venus has a period of rotation of 225 days and a period of revolution of 243 days. How long is a day on venus?
243 earth days.
which characteristics are used to classify stars
color, temp., brightness, size
How would we measure the distance between rigel and betelgeuse?
in light years
Explain why the gas giants have more moons than the terrestrial planets.
they have a stronger gravitational pull.
Explain why there are only a few impact craters on Earth.
Earth's atmosphere is dense and burns up most objects that enter it
Jupiter's gravity is 2x that of Earths
describe the sun's differential rotation
the equator spins faster because it is not a solid
What is Earth's cosmic address
earth, solar system, milky way
Describe the motion of the sun and planets according to the geocentric model of the universe.
The sun revolves around the earth
Which planet has the highest surface temperature
venus, because of the greenhouse effect
Compare the atmospheres of terrestrial and gas giant planets
Terrestrial planets have thinner atmospheres.
What two measurements do astronomers need to calculate absolute magnitude
apparent magnitude & distance from earth
the 4000km star, because its closer
How many light years across is the milky way galaxy?
150,000 light years
Compare the motion of the sun and planets in the geocentric model as opposed to the heliocentric model
geo- sun around earth
helio- earth and planets around the sun