WorksheetsQuiz #3
Total questions: 17
Worksheet time: 32mins
As the clump of gas and dust of a protostar (a very young star) gains mass, what else gets stronger?
pressure
gravitational force between the mass and the other molecules in the cloud
the smell
What has to happen in order for nuclear fusion to start in the core of a star?
a small amount of carbon
winds to blow away the disk
high enough pressure and temperature
gravity must decrease
When you have two objects that have mass and they move closer together, what happens to the gravitational force between them?
Force between the objects increases
Force between the objects decreases
There is no change in the force between the objects
If you double the distance between two objects, the force of gravity between them is _______ as strong as before.
1/2
1/3
1/4
1/5
Let's say two objects have the same mass and the force between them is Fg = 1. If you double one of the masses, the force of gravity (Fg) between them is now ___________.
1
2
3
4
What are facts about gravity? (check all that are correct)
It is a push and a pull.
When you throw a baseball on Earth, sometimes the ball goes straight up and doesn't come down.
It is an attractive force between objects that have mass.
It has both strength and direction.
Where does a star's energy come from?
nuclear fusion
nuclear power plants
radio waves
Red Bull
What is NOT a part of the process of nuclear fusion?
Two light elements, like hydrogen and helium, combine to release energy
Extreme heat and pressure
Gravity
Two heavy elements, like gold and mercury, combine to release energy
During the lifecycle of an average size star (like our Sun), what is it most likely to turn into?
black hole
stellar nebula
neutron star
white dwarf
In the talk on Tuesday by Dr. Julio Sepúlveda, he mentioned a "climate archive." Of the list below, what data set is NOT in the climate archives?
cosmic microwaves
sediment cores
ice cores
tree rings
What unique characteristics of a star can be used to classify it?
surface temperature
size
brightness or luminosity
color
All of the above
Of the list below, what is NOT a nebula?
It is an interstellar cloud.
It is made of dust, hydrogen, helium and other ionized gases.
It is made of millions of stars.
It is a stellar nursery.
Ms Stewart thinks that lab partners or study partners are important for many reasons. What is one thing on the list below that is NOT important for success as a study partner?
They will keep you on track in school.
They will tell you jokes and entertain you.
They will help you figure out hard topics in this class.
They will help you complete your labs and other assignments.
Nuclear fusion converts mass into (a) .
Gravity is what keeps planets orbiting around a star.
True
False
The two important variables in gravitational force between two objects are the shape of the objects and their softness.
True
False
Extra Credit: What is the correct name of this nebula? I showed this in class and called it the wrong name. What is the right name?
