In the carbon cycle, plants convert carbon dioxide from the air in to a. proteins
b. nitrogen
c. carbohydrates
d. nucleic acids​

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d. a round-trip ride to school and back

Construct at least two possible hypotheses for the student’s experiment.