Q: Answer the question

What is formed when a sodium atom and chlorine atom react chemically?

A: a compound

Q: Answer the question

Which type of rock would most likely contain a fossil?

A: sedimentary rock

Q: Answer the question

A student mixed baking soda with vinegar and observed that the reaction was endothermic. When is a reaction endothermic?

A:
when it requires heat to make it happen