Which of the following is not a characteristic that geologists use to identify minerals?
a. streak
b. fracture
c. softness
d. color

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

The energy needs of a human population are not affected by

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.