Star 1 is 18 light years from Star 2 and 34 light years from Earth. If Star 2 explodes as a supernova, in how many years would the explosion be seen from Earth?

18

34

52

70

The two types of plains are coastal plains and lowland plains. a. True b. False

Primary or secondary source? George Washington hat

What three regions have the most industrial development?

40) Which one of the following statements is believed to be true of comets? A) They have highly elliptical orbits around the Sun. B) They are composed mostly of dense rock particles. C) They may gain slightly in mass with each orbit around the Sun.

Which of the following is a way in which surface mines impact an environment ecologically? a. soil erosion b. introducing new species of flora and fauna c. creation of groundwater systems d. all of the above

How does earths orbit affect our climate

Describe some of the challenges facing farms and cities in China as a result of urbanization

Maps are a more accurate depiction of geographic information of places on earth then globes

In what landform is the world's largest rainforest located?

The length of time that a volcanic eruption impacts the climate is largely determined by