Which sentence about galaxies provides evidence of universe expansion that supports the Big Bang Theory?(1 point)
Responses
Galaxies are in constant motion.
Galaxies are in constant motion.
Galaxies are moving away from each other.
Galaxies are moving away from each other.
Galaxies are moving at different speeds and in different directions.
Galaxies are moving at different speeds and in different directions.
Galaxies are moving more slowly than they have in the past.
Galaxies are moving away from each other.
Which provides evidence of universe expansion that supports the Big Bang Theory? Select the three correct answers.(2 points)
Responses
Galaxies are moving away from each other.
Galaxies are moving away from each other.
The universe is undergoing a cycle of contraction and expansion.
The universe is undergoing a cycle of contraction and expansion.
The temperature of the universe is increasing.
The temperature of the universe is increasing.
The temperature of the universe is decreasing.
The temperature of the universe is decreasing.
The temperature of Cosmic Microwave Background radiation varies widely from one part of the universe to another.
The temperature of Cosmic Microwave Background radiation varies widely from one part of the universe to another.
An enormous amount of weak cosmic background radiation has been detected in the universe.
Galaxies are moving away from each other.
The universe is undergoing a cycle of contraction and expansion.
The temperature of the universe is decreasing.
Which is evidence of universe expansion that supports the Big Bang Theory?(1 point)
Responses
The temperature of the universe has cooled and warmed repeatedly over time.
The temperature of the universe has cooled and warmed repeatedly over time.
The temperature of the universe is the same as it was at the time of the Big Bang.
The temperature of the universe is the same as it was at the time of the Big Bang.
The temperature of the universe has cooled over time.
The temperature of the universe has cooled over time.
The temperature of the universe has warmed over time.
The temperature of the universe has cooled over time.
In the Dark Quick Check
1 of 31 of 3 Items
Question
Which are accurate statements about dark matter? Select the two correct answers.(1 point)
Responses
Scientists have hypotheses about dark matter but need more data to test their ideas.
Scientists have hypotheses about dark matter but need more data to test their ideas.
New data could cause scientists to change their hypotheses about dark matter.
New data could cause scientists to change their hypotheses about dark matter.
Scientists are not convinced that dark matter exists.
Scientists are not convinced that dark matter exists.
Scientists thoroughly understand what dark matter is and what it does.
Scientists have hypotheses about dark matter but need more data to test their ideas.
New data could cause scientists to change their hypotheses about dark matter.
Which of the following do scientists think might make up dark matter? Select the three correct answers.(2 points)
Responses
gamma rays
gamma rays
galaxy clusters
galaxy clusters
black holes
black holes
spiral galaxies
spiral galaxies
massive compact halo objects
massive compact halo objects
weakly interacting massive particles
galaxy clusters
black holes
weakly interacting massive particles
Select the correct answer from the list.(2 points)
Dark matter (Does not/does) absorb light, (Does not/does) emit radiation, and (Has/has not) been observed directly.