YR4 has a 2% chance of hitting Earth in 2032. Astronomers are tracking it to refine estimates of its size and orbit to see how much of a risk the space rock poses.

Santa Maria Airport reported 3.86 inches of rain (41% of average), and Santa Barbara Municipal Airport measured 4.43 inches, ...

This answer key will help students compare their answers and estimate their potential marks. Once the answer key is released, ...