Physical Properties
A rock has a mass of 50 grams. What physical property is being described?
Mass
Which state of matter has a fixed shape?
Solid
What is a mixture?
Two or more substances combined that keep their identities.
What unit would you most likely use to measure the mass of a small object?
A. Grams
B. Degrees Celsius
C. Liters
D. Meters
A — Grams
When two substances are mixed, does their matter disappear?
No
A paper clip moves toward a magnet. What physical property is being described?
Magnetism
Which state of matter can flow and takes the shape of its container?
Liquid
Which is a solution?
A. Rocks + sand
B. Pepper + water
C. Salt + water
D. Trail mix
C- Salt + Water
A mixture contains 20 g of sand and 15 g of water. What is the total mass?
35g
Complete the sentence:
Matter is not created or __________.
Destroyed
A thermometer reads 24°C. What physical property is being described?
Temperature
Which state of matter expands to fill its container?
Gas
What makes a solution different from other mixtures?
The substances are evenly mixed, and one substance dissolves in another.
A mixture contains 24 g of one substance and 18 g of another. What is the total mass?
42g
A student mixes 30 g of sand with 20 g of salt.
What should the total mass of the mixture be?
50g
A marble sinks in water. What physical property does this observation help describe?
Density
A substance has a fixed shape and a fixed volume. What state is it?
Solid
True or False:
All solutions are mixtures, but not all mixtures are solutions.
True
A mixture has a total mass of 65 g. One substance has a mass of 24 g and another has a mass of 18 g. What is the mass of the third substance?
23g
A student says:
“When I mixed the salt and water, the salt disappeared, so some of the matter was lost.”
Is the student correct? Explain.
No. The salt dissolved, but the matter is still there. The matter was not destroyed.
Water flows freely and takes the shape of its container. What physical property is being described?
Physical State - Liquid
A substance has a fixed volume but can flow. What state is it?
Liquid
A student mixes sand and water. The sand can still be seen at the bottom of the container. Is this a mixture or a solution? Explain.
Mixture — the substances are not evenly mixed and the sand does not dissolve.
A mixture contains 12 g, 18 g, and 25 g of three substances.
What is the total mass?
55g
A mixture contains 35 g of substance A and 25 g of substance B. After they are mixed, what should the total mass be?
Then explain why.
60 g because matter is conserved and the total mass is the sum of the masses of the parts.