The two correct answers are:
- The percentage of unknown material has grown in scientists' estimates since the 1970s.
- The percentage of dark matter has shrunk in scientists' estimates since the 1980s.
How has scientific understanding about the composition of the universe changed over time? Select the two correct answers. (1 point)
[ The percentage of ordinary matter has grown in scientists' estimates.
[ The percentage of unknown material has grown in scientists' estimates since the 1970s.
• The percentage of dark energy has shrunk in scientists' estimates.
The percentage of dark matter has shrunk in scientists' estimates since the 1980s.
1 answer
5 answers