1. Which physical property is used to classify minerals and gems? 2. What do you get if you combine vinegar with baking soda?

3. What do you get if you combine iron, water, and oxygen?

4. Give an example of a physical change.

5. What is a chemical property of gasoline, paper, and wood?

I think these are the right answers sorry about 5...

1 are determined by the atomic structure and crystal chemistry of the minerals. or hardness

2 acid based reaction

3 rust

4 Examples of physical changes are boiling, melting, freezing, and shredding.

5 I don't know

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying