How would you perform a streak test on a mineral that it's hardness is 8 1/2?

you would test it on something harder (i think)

Explanation:

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

the correct answer is 2 and 4