Question 1 (1 point)

Question

What causes the creation of a nebula?

a
Gravity pulls together the dust and gases in space into the large clouds that make up nebulae
b
Solar winds blow the dust and gases toward each other, causing it to clump together into the clouds that make up nebulae
c
Gases accumulate together by pressure forces of the vacuum to make clouds that make up nebulae
d
Gas planets explode and spread their gases into narrow areas where they clump together to make the clouds that make up nebulae
Question 2 (1 point)
Which of the following are the largest?

a
Solar System
b
Planet
c
Galaxy
d
Cluster
Question 3 (1 point)
Galaxies are classified by:

a
Energy, Size, and Age
b
Age, Size, and Motion
c
Age, Size and Composition
d
Size, Energy and Composition
Question 4 (1 point)
What type of galaxy is this classified as?

a
Elliptical
b
Spiral
c
Spherical
d
Flat
Information for your notes

The birthplace of stars is called a nebula

A nebula is a large cloud of dust and gas that has accumulated by being drawn together by gravity.



Stars typically form the center of solar systems.

Many thousands of solar systems orbiting a large massive core is a structure called a Galaxy

Multiple galaxies join together to make Clusters



Galaxies are classified by their shape, size, and age of the stars.

Spiral Galaxies

Elliptical Galaxies

Irregular Galaxies

Question 5 (1 point)
The death of a star occurs when

a
It starts to run out of hydrogen fuel
b
It starts to run out of gravitational force
c
It starts to run out of plasma
d
It starts to gain too much mass
Question 6 (1 point)
A black hole is a point in space that has collasped in on itself. Which of the following is the most likely reason as to why this happens?

a
The supernova explosion collects a massive amount of matter around the exploding star, thus dramatically increasing the mass and thus increasing the gravity to cause it to collapse
b
The star's gravity starts to increase over time because gravity constantly increases for the same object over a cosmic lifespan. Eventually, it becomes so large that it pulls the star inward
c
The core of the star puts out so much energy that at a certain point that is tears a hole in space which causes the star to collapse into that hole
d
Gravity attempts to pull the star inward, the fusion process pushes it outward. So when the fuel runs out, there is no fusion process to push it out, so the gravity pulls it in to collapse
Question 7 (1 point)
Since black holes have such high gravity, they do not allow light to escape. How is it that scientists can identify a black hole?

a
They detect the radio waves coming from the black hole
b
They detect odd behaviors of the object near them
c
They detect the sound that black holes emit
d
They detect the immense mass of the black hole as it moves
Information for your notes

The end of a star's lifecycle is when it runs out of hydrogen fuel. The gravity of a star is so strong that is constantly attempts to pull the star into itself into collapse. It is the fusion process that produces the energy that pushes the star back out, thus resisting this pull of gravity

When the star runs out of hydrogen fuel, it no longer produces the energy to resist gravity. This is when the star begins to die. The gravity pulls the star in on itself, causing two things to occur

1) All the remaining matter in the star is crunched together during this gravitational surge, causing every single element to undergo fusion all at once. The immense amount of energy released causes the star to explode, in an event called a 'nova' or 'supernova' depending on the size of the explosion. This spreads the matter of the star across the universe

2) The gravity remains and collapses the remaining star into itself, causing it to collapse the area of space it is in. This area of collapsed space is called a 'black hole'. They gravity of a black hole is so strong that light cannot escape it and they serve as the center of galaxies.

Question 8 (1 point)
The reason why dark matter cannot be seen is because:

a
It matches the color of the background radiation
b
No detection device exists that can record their frequency
c
It cannot reflect or absorb light
d
It moves too quickly to detect
Question 9 (1 point)
The overwhelming majority of elements that make up the universe is hydrogen. Where do all the heavier elements in the universe come from?

a
New matter is constantly being injected into the solar system
b
Gas giants create the gas in the atmosphere which contain trace amounts of the heavier elements
c
Over time, the hydrogen atoms eventually accumulate the particles of other matter, becoming heavier in turn
d
The fusion process of stars combines hydrogen into larger elements and then combines those elements into larger ones over time
Information for your notes:

The most abundant form of matter in the Universe is the element Hydrogen, which is the simpliest element in existence.

All stars are made of over 90% hydrogen plasma.

The fusion process that powers a star also takes the hydrogen and fuses it with other hydrogen atoms, thus making the heavier elements that fill out the rest of the universe.



Strangely enough, all calculations state that the universe should have far more matter in it than any of observations have confirmed. The only explanation for this is that a large amount of matter in the universe must be invisible to us. This is called Dark Matter. Dark Matter does not reflect or emit any form of light or electromagnetic radiation, therefore we are unable to detect it in any wat at this current time in our history.

Question 10 (1 point)
What is the name of the Galaxy that the Solar System is a part of?

a
Andromeda
b
Sombrero
c
The Black Eye
d
Milky Way
Question 11 (1 point)
If galaxies are moving on average about 500,00 miles per hour across the Universe, why don't they collide more often?

a
The size of the universe is so large that there is a huge amount of space in between them
b
The forces produced by the galaxies push them apart
c
Their high velocities keep them moving to fast to interact with one another
d
The galaxies are pulled apart by the gravity of the black holes in their centers
Question 12 (1 point)
Which of the following is the most likely to occur when two or more galaxies collide?

a
The gravitational forces of the stars in the galaxies throw matter around before the galaxies eventually combine into one
b
The immense kinetic energy of the galaxies causes the stars of the galaxy to break apart, reducing the number of stars in both galaxies
c
The multiple galaxies squeeze together, pressing into a larger galaxy that flattens out over time
d
When the galaxies collide, the black holes at their centers rupture, causing both galaxies to explode, spreading their material all across the universe
Question 13 (1 point)
Why did galaxies form?

a
Stars are naturally drawn to each other in order to produce the most possible light
b
The gravity of black holes is so strong that is pulls the stars together and pulls them into the galaxies
c
After the big bang, the matter of the universe was not equally distributed and instead was clumped into localized areas
d
Energy tends to accumulate into localized areas, so stars are naturally drawn into specific, high energy locations, which form the galaxies
Question 14 (1 point)
What force is the basis of the formation of all galaxies and solar systems?

a
Momentum
b
Gravity
c
Friction
d
Normal Force

Answer 1

Here are the answers to your questions:

Question 1:
a - Gravity pulls together the dust and gases in space into the large clouds that make up nebulae

Question 2:
c - Galaxy

Question 3:
d - Size, Energy and Composition

Question 4:
Based on the classification of galaxies provided, since there is no image to identify the galaxy type, I cannot provide an answer. Please select an option from the choices based on the visual representation.

Question 5:
a - It starts to run out of hydrogen fuel

Question 6:
d - Gravity attempts to pull the star inward, the fusion process pushes it outward. So when the fuel runs out, there is no fusion process to push it out, so the gravity pulls it in to collapse

Question 7:
b - They detect odd behaviors of the object near them

Question 8:
c - It cannot reflect or absorb light

Question 9:
d - The fusion process of stars combines hydrogen into larger elements and then combines those elements into larger ones over time

Question 10:
d - Milky Way

Question 11:
a - The size of the universe is so large that there is a huge amount of space in between them

Question 12:
a - The gravitational forces of the stars in the galaxies throw matter around before the galaxies eventually combine into one

Question 13:
c - After the big bang, the matter of the universe was not equally distributed and instead was clumped into localized areas

Question 14:
b - Gravity

Feel free to ask if you have any further questions!