Definitions
The smallest chemical unit of matter.
What is an atom?
If you wanted to measure an object's mass, what metric unit would you use?
Metric - grams.
Is water an element (made of billions of one type of atoms) or a compound (made of billions of molecules)?
If an object is 500 centimeters long, how many meters is it?
5 meters
Two or more atoms linked together to make a substance with unique properties.
What is a molecule?
If you wanted to measure an object's volume, what metric unit would you use? What English unit woudl you use?
Metric - liters. English - gallons, pints, or quarts.
Have scientists ever seen atoms?
No. Scientists have seen images created by calculations of a computer based on a theory of quantum mechanics, but no one has seen an atom.
If an object has a mass of 60 kg, what is the mass in grams?
60,000 grams
The quantity of a substance within a certain volume
What is concentration?
If you wanted to measure an object's length, what metric unit would you use? What English unit would you use?
Metric - meter. English - feet, yards, inches, or miles.
Why is the Statue of Liberty green?
Over time, from exposure to the weather, the copper has reacted with elements in the environment (hydrogen, oxygen, and carbon atoms) to create the greenish compound called copper hydroxycarbonate.
How many centimeters are in 2.4 meters?
240 centimeters
Define mass.
Mass: how much matter exists in an object. (Mass does not depend on where you are).
Give the numerical meaning for the prefixes "centi," "milli," and "kilo."
centi: 0.01, milli: 0.001, kilo: 1,000
When a water molecule (H2O) is broken down into individual atoms, do the atoms share the same properties as water?
No. Water is a colorless, odorless liquid. When the water molecule is broken down, hydrogen and oxygen are produced, which are both gasses.
7.56 L
Define weight.
Weight: How hard a planet's gravity pulls on an object. (Weight changes based on where you are; I weigh less on the moon than the earth due to less gravity, but my mass stays the same).
What English unit is used to measure mass?
Slugs. (Pounds are used to measure weight, which is not the same as mass).
What is the name for substances that are made out of billions of the same atom?
Elements (aluminum, copper, hydrogen, etc.)
An object is 250 centimeters long. How many inches long is it? (1 in = 2.54 cm) You can round to the nearest hundredth.
98.43 in