have a negative charge and are located on the outside of the nucleus.

a. protons
b. neutrons
c. electrons
d. nucleus

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

In science and physics what is the standard unit of measure for speed?