properties of matter that determine how a substance reacts with other substances
By observing how it reacts with other substances
water
The substances contained in the pH paper react with the substance to be tested; and this is a chemical reaction.
The age of whatever is being tested [dated]
Chemical
Animals die when they are being tested on because they are having foreign substances put into their bodies. Animals that are tested on also have chemicals put into them. An animals body is not made to handle these chemical and foreign substances.
Condition
It is tested to determine if the body is producing antibodies to HIV.
properties of matter that determine how a substance reacts with other substances
You will have to be tested to determine if you are infected with HIV.
It's a secret
It is a glass tube and it is used to contain substances being tested!
Hypotheses
true
their are many kinds of jgrchbfbh
By observing how it reacts with other substances