The units g/ mL and grams per cubic centimeters (g/cm3) are both used to measure this property of a substance.
What is "density?"
100
This type of property can be observed or measured in a substance without changing its identity.
What is a "physical property?"
100
At this point a liquid changes to solid.
What is the "freezing point?"
100
This physical property describes the ability of a substance to dissolve at a certain temperature.
What is "solubility?"
100
Unlike compounds, elements keep these when they combine to form a mixture.
What are "original properties or identities"
200
Which has more mass? A kilogram of lead or a kilogram of feathers? Which has a greater volume?
What is "neither has more mass, but the feathers require a greater volume to equal the same mass as lead ?"
200
This property describes the amount of matter in a given space.
What is "density or m/v?"
200
Water evaporating from a pond is this type of change
What is a "physical change?"
200
The air that you breathe is composed of 78% nitrogen, 21% oxygen, and 1% trace gases. Which of those substances is the solvent?
What is "nitrogen?" ( The solvent is always in the greater amount!)
200
In this type of mixture, the components are spread evenly throughout and appear to be a single substance.
What is a "homogeneous" mixture or "solution."
300
This will happen to an object placed in water, if the object’s density is less than 1gm/mL.
What is 'the object will float?"
300
This physical property can be used to classify oxygen helium, and hydrogen as being similar.
What is "state" or a "gas?"
300
This factor is absorbed or released during a physical change when matter changes state.
What is "thermal energy" or "change in temperature?"
300
Suggest 3 methods for increasing the rate at which a substance dissolves.
What is (1) heat the solvent
(2) crush the solute
(3) stir the solute in the solvent
300
Which pair of substances are both mixtures?
A) silver ; milk
B) air ; ocean water
C) carbon ; iron
D) water ; coca-cola
What is (B) air and ocean water?
400
A rock is placed in a g- cylinder containing 50 mL of water. The water level rises to 160 mL after the rock is added to the cylinder. What is the volume of the rock?
What is "110 mL?"
400
This physical property can be used to separate iron filings from sand.
What is "magnetism?"
400
This happens to the temperature of a substance during the process of melting.
What is "does not change?"
400
Name two ways that a solution and a suspension differ.
1) ____________________
2) ____________________
What is ...Unlike in a suspension, the particles in a solution
(1) cannot be filtered
(2) cannot block light or
(3) are evenly distributed
400
Picture ______ shows a mixture made of two diffferent elements.
What is "Picture C?"
500
This is the mass of an object that has a density of 5g/cm3 and a volume of 10 cubic centimeters?
What is "50 g?" D = m/v
5g/cm3 = m / 10g
5g/cm3 = 50g/10g
500
List four physical properties of water.
1)_____________________
2)_____________________
3)_______________________
4)______________________
What is "transparent, liquid, density of 1gm/mL, colorless, odorless, nonflammable, ..."
500
This physical change occurs when a vapor changes to a liquid.
What is "condensation?"
500
This method can be used to separate 2 liquids which have different boiling points.
What is "distillation?"
500
Suggest 3 steps in the correct order for removing salt from a mixture of sand and salt.
What is (1) Filter the sand
(2) Dissolve the salt in water
(3) Evaporate the water from the salt