Unit Test — Unit test Answers

Which best explains what happens when an electron moves from an excited state to the ground state?

Daniel observed and compared some stars at night and recorded his observations in a chart.Daniel later discovered that star X is farther away from Earth than the other stars he observed, and star Z is closest to Earth.

The emission spectrum of the element lithium is shown below.What is the best estimate of the color that will be seen when a sample of lithium gas absorbs a lot of energy?

Alyssa is carrying a water balloon while running down a field at a speed of 14 m/s. She tosses the water balloon forward toward a bucket with a speed of 23 m/s. Alyssa’s friend Naya is standing still next to the field.