Homework 6/19

1.A physical property is a property that can be observed and measured without changing the chemical makeup of the substance. 
2.3 physical properties of water: density, freezing point, and boiling point. 
3.The density of solid water is more than the density of a liquid because 1 milliliter of volume is equal to 1 cubic centimeter. 
4.A lake is a setting that contains water as a solid, liquid, and a gas. 
5.A heterogeneous mixture is a mixture that has colloids and is not uniform throughout, but a homogeneous mixture is uniform throughout and has a continuous mixture of water particles.
6.One needs to know the density and mass of each liquid to know that the gasoline will always float on top of the water. 
7.A) Suspension B) Suspension C) Solutions D) Colloid/ Solution E) Suspension F) Colloid 8.It is a colloid. 
9.

10.It is a solution. 
11.A substance is an element or compound that has a definite and uniform composition. Two examples would be a molecule or an atom.
12. A) Element B) Element C) Compound D) Element E) Compound F) Compound G) Compound