Measuring & Liquids
Measuring & Solids
Density
Properties
Classifying Matter
100
What is "matter"?
Anything that has volume and mass.
100
What is the formula for the volume of a regular, solid object?
volume = length x width x height
100
What is "density"?
the amount of matter in a certain volume
100
What's the difference between a physical change and a chemical change?
does it form a new substance or not
100
Explain the difference between molecules of an element and molecules of a compound.
200
What is another word used to refer to matter?
substance
200
How can you measure the volume of irregularly shaped solid objects?
water displacement
200
Why is a box with cotton less dense than a box with rocks?
be careful of how you use weight or mass.
200
Describe condensation.
the temperature at which a gas turns to a liquid
200
What chemical change happens to the particles of a substance in a mixture?
none. mixtures are only physically combined
300
What is the definition of "volume"?
the amount of space that it takes up
300
Define water displacement.
the change in volumes.
300
What is the formula for density?
mass / volume = density
300
Explain the shape and volume properties of solid, liquid, and gas.
solid - definite shape and volume // liquid - no definite shape, definite volume // gas - not definite for both
300
What are 3 ways to separate a mixture?
a few answers, examples: size, color, shape, density
400
What is used to measure the volume of a liquid?
a graduated cylinder
400
What are some common units of mass in Korea?
g, kg
400
How can you use density to separate the liquids in a mixture?
more dense sinks
400
What are two things that determine a substance's state of matter?
motion of particles and strength of attraction
400
Explain diluted and concentrated in terms of solute and solvent.
500
What is the definition of "graduated"?
divided into equally marked parts
500
Explain the difference between mass and weight.
weight has to do with gravity, mass is the amount of matter in something
500
What state of matter is usually the most dense?
solid
500
Describe how ice cream can go through 3 physical changes.
Be creative!
500
Why is it important to be aware of potential chemical changes before attempting to physically combine two substances?
If you're only trying to physically combine something, but it results in a chemical change, it can be really dangerous!