Which of the following is/are a nonrenewable source of energy that can be used to produce electrical energy?
a.
solar energy
b.
wind
c.
nuclear reactions
d.
all of these

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

Aphysical reaction is a process in which one or more reactants change into one or more products with different properties. select the best answer from the choices provided t f