Module 2 Test Flashcards
What type of change occurs when water changes from a solid to a liquid
a phase change and a physical change
Sugar is a substance made of three elements joined in a fixed proportion. Sugar is an example of a(n)
compound
A substance that has little tendency to change into other substances is said to have low
reactivity
Ninety-nine percent of all matter than can be observed in the universe is
plasma
A substance that is made up of only one kind of atom is a(n)
element
If an unknown substance CANNOT be broken down into simpler substances, it is ___.
an element made up of one kind of atom.
Matter that has a definitive volume, but no definitive shape
liquids
Which of the following have the highest viscosity: corn syrup, water, vegetable oil, or alcohol?
corn syrup
When a physical change in a sample occurs, what changes does that affect?
shape, size, and volume
Forces of attraction limit the motion of particles most in
solids
A substance that has high reactivity ___.
easily combines chemically with other substances
Which of the following are pure substances: solutions, compounds, homogeneous mixtures, or heterogeneous mixtures
compounds
A material that is both malleable and conducts electricity easily is most likely ___.
a metal
What are some clues that a chemical change has occured
change in color, production of a gas, formation of a precipitate
The phase change in which a solid changes directly into a gas without first becoming a liquid is called
sublimination
