What is 13×3÷4=
100 ÷14+63 =

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

What organ systems are working to you cool down after a workout?

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis