Our planet is heating up because
A. cutting of forests
B. burning of fossil fuels
C. the sun getting hotter
D. both A and b

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Which is a possible result of higher air temperatures caused by global warming? a. increase in sea level b. freezing of polar ice caps c. rapid evaporation of water in the soil d. flooding of low-lying coastal areas

Combine like terms. do not forget to use the distributive property to simplify the first term. 2(3y + 5k) - 2k