Which of the following is considered an alternative energy resource?
a. coal
b. biomass
c. petroleum
d. natural gas

once again, not smart enough to figure this out. (xd)

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

1. list three scientific reasons cockroaches may fly.

How many neutrons does an element have if its atomic number is 50 and its mass number is 166