How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.(1 point)
Responses
The percentage of ordinary matter has grown in scientists' estimates.
The percentage of ordinary matter has grown in scientists' estimates.
The percentage of dark energy has shrunk in scientists' estimates.
The percentage of dark energy has shrunk in scientists' estimates.
The percentage of dark matter has shrunk in scientists' estimates since the 1980s.
The percentage of dark matter has shrunk in scientists' estimates since the 1980s.
The percentage of unknown material has grown in scientists' estimates since the 1970s.
The percentage of ordinary matter has grown in scientists' estimates.
The percentage of dark energy has shrunk in scientists' estimates.
How did dark matter affect the development of structures in the early universe?(1 point)
Responses
It cooled pockets of gas to form nebulae.
It cooled pockets of gas to form nebulae.
It seeded the development of quasars.
It seeded the development of quasars.
It seeded the development of galaxies.
It seeded the development of galaxies.
It became part of black holes.
It seeded the development of galaxies.
Which is evidence for the existence of dark energy?(1 point)
Responses
Supernovae that are moving away at an accelerating rate.
Supernovae that are moving away at an accelerating rate.
Black holes that are expanding at a constant rate.
Black holes that are expanding at a constant rate.
Pulsars that seem to be moving closer at an accelerating rate.
Pulsars that seem to be moving closer at an accelerating rate.
Galaxies that are rotating at a constant rate.
Supernovae that are moving away at an accelerating rate.
Is this all correct?
Apologies for the confusion in the previous response. Yes, the correct answer is Supernovae that are moving away at an accelerating rate.
What about 1. and 2. Questions
Apologies for the oversight. Let me address each question again:
1. How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.
The correct answers are:
- The percentage of ordinary matter has grown in scientists' estimates.
- The percentage of dark matter has shrunk in scientists' estimates since the 1980s.
2. How did dark matter affect the development of structures in the early universe?
The correct answer is:
- It seeded the development of galaxies.
I apologize for any confusion caused by the initial response. Thank you for pointing it out.
it correct but not Question 1. it
The percentage of dark matter has shrunk in scientists' estimates since the 1980s.
The percentage of unknown material has grown in scientists' estimates since the 1970s.