Properties of Matter
What property measures how tightly packed the particles of a substance are?
Density
Is saltwater a mixture or a compound?
Mixture
What is the name of the process when a gas turns into a liquid?
Condensation
When you boil water to cook pasta, is this a physical or chemical change?
Physical change
A state of matter with a definite volume but no definite shape
Liquid
What kind of property is "ability to dissolve in water?
Physical property
Which type of mixture has particles so small they cannot be seen under a microscope?
Solution
What happens to the speed of particles as a solid heats up and begins to melt?
They move faster
Rust forming on a metal fence is an example of what type of change?
Chemical change
A homogeneous mixture composed of two or more substances
Solution
What term describes the ability of a substance to ignite and burn?
Flammability
What is a pure substance that cannot be broken down into simpler substances?
Element
During which process does liquid water become water vapor?
Evaporation
Which property helps explain why ice floats in water?
Density
A change in which no new substances are formed
Physical change
Name 3 physical properties you can observe without changing the material itself.
Color, texture, hardness
What do we call a mixture where different parts are easily distinguishable?
Heterogeneous mixture
What is it called when a liquid changes into a solid?
Freezing
Why is water considered a compound and not a mixture?
Because its elements are chemically bonded
A substance formed from two or more elements chemically united in fixed proportions.
Compound
What type of property allows iron to combine with oxygen to form rust?
Chemical property
Which is a compound: oxygen gas, carbon dioxide, or copper?
Carbon dioxide
What happens to the spacing of particles as a gas is compressed?
They get closer together
What type of mixture is muddy water if it separates into layers over time?
Suspension
The basic unit of a chemical element.
Atom