Question

How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.(1 point) Responses The percentage of dark energy has shrunk in scientists' estimates. The percentage of dark energy has shrunk in scientists' estimates. The percentage of ordinary matter has grown in scientists' estimates. The percentage of ordinary matter has grown 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

Answer 1

The two correct answers regarding how scientific understanding about the composition of the universe has changed over time are:

1. The percentage of dark energy has shrunk in scientists' estimates.
2. The percentage of dark matter has shrunk in scientists' estimates since the 1980s.

These changes reflect the evolving understanding of the universe's composition, including the roles of dark energy, dark matter, and ordinary matter.

Answer 2

You have now learned the importance and benefits of weight training and cardiovascular activity. Decide which athlete might use the least amount of weight training in his/her preparation. (1 point) Responses Football player Football player Wrestler Wrestler Baseball player Baseball player Cross-country runner

Answer 3

The athlete who might use the least amount of weight training in his/her preparation is the cross-country runner. Cross-country runners typically focus more on endurance training and cardiovascular activity rather than heavy weight training, which is more commonly prioritized by athletes in sports like football, wrestling, and baseball.