Answer:
I needed to use good precision in my measurement for my chemistry lab
Explanation:
it will expand as water moves into it.

Blank # 1 - keep safe distance from the burner
Blank # 2 - Place the equipments on the right place after use
Blank # 3 - perform experiments with proper lab equipment and safety tools
Blank # 4 - Don't break any test tube or lab equipment
(maybe it can be hazardous)
Varuable, In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation :)
True because they are organically made without any things that include chemicals