Marlee and her family were spending time at the beach. Marlee and her brother made this tower with rocks they found on the beach. "Great tower!" said their mom. "The rocks are so smooth! How did that happen?" What did Marlee tell her mother?

Identify the missing parts of the carbon cycle

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. label the following topographic map. click on a label below the map to select it, and then click on the appropriate box on the map to place the label. (increments for contour lines is 50 ft).

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi