How many bonds can carbon make with itself
or other elements?
A. 7
B. 8
C. 4
D. 1

In the water cycle , when does water undergo a chemical change

Witch theory suggests all living things are made up of cell or cells

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.