Physical Chemical
Density
States
Classify
Wild Card
100
Is melting point a chemical or physical property?
Physical property
100
What is the equation for density?
D = m/v
100
Name the 3 phases of matter.
Solid, liquid and gas
100
What are the two types of pure substances?
Elements and compounds
100
What is the word for the amount of matter in an object?
Mass
200
Is this a chemical or physical change?
Chemical change
200
Fill in the blanks:
Low density objects ________ and high density objects _______.
(Word options: sink, evaporate, dissolve, float)
Low density objects float and high density objects sink.
200
Draw a particle diagram for gas molecules. Be sure to include the correct number of movement/wiggle lines!
200
How should hydrogen gas be classified?
Element
200
What is the word for ability of a substance to reflect light or shininess?
Luster
300
From the list, choose all the physical properties.
Solubility
Oxidation
Combustibility
Magnetism
Boiling Point
Color
Solubility
Magnetism
Boiling Point
Color
(Must have all 4 to count!)
300
What is the least dense liquid in the container?
Ethyl alcohol
300
What phase change is shown here?
Condensation
300
Classify the following:
Hint: it's an alloy.
Homogeneous mixture
300
What do the flat areas of the heating curve represent?
Phase changes (melting/boiling)
400
What are 2 signs a chemical change has happened?
Pick 2:
Color change
Odor change
Formation of gas/bubbles
Temperature change
Formation of a solid
400
If a liquid has a mass of 352 g and a volume of 546 mL, what is the density? (*Remember to include units!)
0.64 g/mL
(Honors chem: 0.645 g/mL)
400
What phase change is shown below? (This is dry ice.)
Sublimation
400
Explain the difference between a homogeneous mixture and a heterogeneous mixture.
A homogeneous mixture is the same composition throughout while a heterogeneous mixture has definite pieces/separates into layers. It is not the same throughout.
400
What is the melting point of iron using the heating curve shown?
1500℃
500
What is a physical change you could perform on water?
Pick something that keeps it H2O:
Changing the phase, etc.
500
You find a shiny gold rock and need to determine if it's real gold. (Lucky you!) The rock is 123 g. You put the rock in a graduated cylinder with 5.00 mL of water. The water level rises to 11.37 mL. If the density of real gold is 19.32 g/mL, is your shiny gold rock the real deal?
*You must prove your answer with a calculation!
Yes!
500
Give an example of deposition
Possible answers:
Frost on the grass/roofs
Snowflakes
500
Classify the following as
(1) element
(2) compound
(3) mixture of elements
(4) mixture of compounds
(5) mixture of elements and compounds
(5) Mixture of elements and compounds
500
Why is the second flat area longer than the first flat area on the heating curve shown?
The second flat area represents vaporization. It takes more energy to break the forces of attraction between molecules to move them into the gas phase. The first flat area is shorter because fewer forces of attraction are being broken to move the substance into the liquid phase.