Matter
What is the smallest unit of an element that maintains the properties of that element?
An Atom
What type of property can only be observed by attempting to change a substance?
A chemical property
What type of change does not create a new substance?
A physical change
What type of mixture does a snow globe contain?
A suspension
What is the name of the change of state from liquid to solid?
Freezing
What is the formula for the volume of a rectangular object?
V=lwh
What is the formula for density?
D=m/V
What is an example of a chemical change?
Some answers include: iron rusting, baking a cake, pennies oxidizing and turning green, photosynthesis, etc.
What is a mixture that does not have a uniform composition. (Hint: colloids and suspensions are both this type of mixture)
A heterogeneous mixture
Which state of matter has particles that vibrate in place, but don't move freely?
A solid
You have a graduated cylinder that has 103 mL of water. You drop a chess piece in it, and afterwards the water line goes to 117 mL. What is the approximate volume of the chess piece (in cm3)?
14 cm3
What type of property is density?
A physical property
What is a common indicator that a chemical change has happened?
Answers include: production of an odor, production of a gas, formation of a precipitate, change in color, and change in energy.
What type of substance is made up of more than one type of particle that are NOT chemically combined?
A mixture
When you freeze water, what happens to the average speed of the molecules?
It lowers (the particles slow down).
What is the measure of the amount of matter in an object?
Mass
What type of property is a substance's boiling point?
A physical property
What is the law that states "Mass is neither created nor destroyed in ordinary chemical or physical changes?"
The Law of Conservation of Mass
What is the name for a substance that is made up of different kinds of atoms chemically combined?
A compound
What state of matter has a definite volume, but not a definite shape?
A liquid
What device is mass often measured with?
A balance.
You have an unknown metal with a volume of 4cm3 and a mass of 22g. What is the density of that metal?
5.5g/cm3
Look at the following formula:
2Na(s) + 2H20(l) -> 2NaOH(aq) + H2(g)
Is this a chemical change or a physical change?
A chemical change
An unknown mixture has a pH of 10.1. What type of mixture is it?
A base
What happens to the temperature of a substance while it is undergoing a change of state?
The temperature stays the same