What happens to a sedimentary rock after a glacier or avalanche occurs? what would it turn into?
a) sedimentary rock
b) metamorphic rock
c) igneous rock
d) sediment

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

Approximately what portion of the foods that we eat have been genetically modified in some way? a. fewer than 10% b. about 50% c. nearly 100%

What is responsible for the uneven heating between the poles and the equator on any given day