What is one reason we cannot determine the exact size of the universe?
Our Expanding Universe | Compilation

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Physics, Science
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11th Grade - University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The universe is too small to measure.
Light from distant objects takes time to reach us.
We have already measured the universe's size.
The universe is not expanding.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the observable universe?
A small part of the universe that is not expanding.
A sphere extending 13.8 billion light years from Earth.
The entire universe, including all galaxies.
Only the Milky Way galaxy.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the expansion of space affect the observable universe?
It has no effect on the observable universe.
It causes the observable universe to appear larger than it is.
It makes the universe smaller.
It stops the universe from expanding.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is dark energy believed to be?
A type of matter that emits light.
A property of empty space that causes expansion.
A force stronger than gravity.
A type of energy that contracts the universe.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why doesn't dark energy affect galaxies like the Milky Way?
Dark energy is too weak to affect galaxies.
Galaxies are immune to any form of energy.
Gravity within galaxies is too strong for dark energy to overcome.
Dark energy only affects planets.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is one method used to measure the universe's expansion rate?
Observing the brightness of Cepheid variables.
Measuring the temperature of planets.
Counting the number of stars in a galaxy.
Calculating the distance to the sun.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the cosmic microwave background?
The light from nearby stars.
A type of dark energy.
The oldest light in the universe.
The light from the sun.
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