Gravity
What affects how strongly the Sun pulls on an object in space?
The mass of the object/the mass of the Sun/how far the object is away from the Sun
Two of the inner planets are?
Mercury/Venus/Earth/Mars
What characteristic classifies an object as a moon instead of a planet?
A moon orbits a planet; a planet orbits the Sun.
A galaxy that has a shape similar to a football is a(n) _________________ galaxy.
elliptical
The H-R Diagram graphs a star's _______________ and ___________________.
brightness (luminosity)/temperature
As the solar system cooled and developed, larger bodies were pushed away from its center by gravity. True or False?
False
What is the order of the inner planets outward from the Sun?
Mercury, Venus, Earth, Mars
Distance from the Sun does not affect the number of moons a planet has. True or False?
False
The Sun is part of this galaxy.
Milky Way
The Sun is what color of a star?
Yellow
Why do planets and other space objects revolve around the Sun rather than travel in a straight line?
the gravitational pull of the Sun
Name two of the outer planets.
Jupiter/Saturn/Uranus/Neptune
Why do we see light from the moon?
It reflects the Sun's light (sunlight bouncing off of its surface).
What is a huge collection of gas, dust and stars held together by gravity?
A galaxy
A star's color is determined by its __________.
temperature
What data about a planet can help someone infer the size of the planet?
how many moons it can capture due to its pull of gravity
Which planet comes after Saturn going outward from the Sun?
Uranus
What do some scientists think that moons of outer planets once were (because of their size, irregular shape and orbit)?
captured asteroids
Mars' atmosphere contains 90% of what gas?
Carbon dioxide
Red stars are __________(hotter/cooler) stars and live a __________(longer/shorter) lifespan than blue stars.
cooler/longer
Using a foam ball, long strips of ribbon and some pushpins to make a model of a comet and then attaching a long string to the ball of the model and swinging the comet above in a circular motion, what does the string represent?
gravitational force of the Sun
Planets are formed from gravity causing this to clump together.
gases
The largest moon in the solar system belongs to which planet?
Jupiter (Ganymede)
Which planet has the longest revolution?
Mars
Stars that fit in the general trend on the graph are in the _____________________.
main sequence