An astronomer measures the light coming from two stars, star a and star

b. they appear to be equally bright. from other measurements, she knows that star b is actually twice as far away as star

a. what can she conclude?

Which of the following are qualities necessary for a historian? patient happy corrupt versatile didactic tenacious imaginative stubborn good judgment honest unprejudiced accurate pugnacious moral

What is the body of water that is part of the atlantic ocean

Venus is almost Earth's "twin" with a similar size and gravity. However, the atmosphere of Venus lacks water. What is the fundamental difference between Earth and Venus that is responsible for Earth having water and Venus lacking water.

Warm-up routines increase body temperature. What other effect do they have on the body?

You see the moon in the sky right before the sunrise. You immediately recognize that it may be either in the first quarter or in the third quarter, but you are still not sure which is the correct phase.

Your friend tells you that our orbit is so special that it is at just the right distance from the sun for us to be at the right temperature for life to flourish. He says that if we were even ten miles closer to the sun, we would burn up.

The suns energy is classified by what

Earth is a closed system. that means the amount of rocks, metals, carbon, nitrogen, oxygen, and water on earth ___. so it is essential that bio geochemical cycles __ these materials as they move through earths subsystems A: remains constant.

What are the percentages of the large near Earth asteroids that we have found so far?

Name the lines of latitude that are labeled north of the equator what would be the next label after 75 degrees north