Which of the following are lipids?
a. waxes
b. carbohydrates
c. amino acid
d. protein

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

Wich is not standing in the way of astronomers getting a good view of different star