Chemical Vs. Physical changes
Pure Substances/Mixtures
Phase Changes
Unit conversions/sig figs
potpourri
100
Identify the following as an intensive or extensive physical property: The density of copper is 43.4 g/mL
What is intensive physical property
100
Classify the following as homogeneous or heterogeneous mixtures: 1. a salad 2. Powder drink mix dissolved in water 3. brass (zinc+copper)
What is 1. heterogeneous 2. homogeneous 3. homogeneous
100
Draw the plot diagrams for a solid, liquid, gas
What is SEE BOARD
100
How many significant figures do the following numbers have? 1. 0.09 2. 0449 3. 0.39009
What is 1. 2 2. 3 3. 5
100
Is electricity an example of matter?
What is No. Electricity does not have mass or take up space.
200
Identify the following as a chemical or physical change: burning wood
What is chemical change
200
describe how a homogeneous mixture differs from a heterogeneous mixture
a homogeneous mixture is uniform throughout (same ratios of different compounds). a heterogeneous mixture is NOT uniform throughout. Does not blend smoothly throughout
200
a cup of milk is poured from a cup into a bowl. Describe the changes that occur in the milk's shape and volume
The volume of the milk remains UNCHANGED (definite volume) BUT it's shape fits the new container, meaning that its shape is indefinite.
200
What is the major difference between the metric system and our system of measurement?
What is the metric system is based off of powers of ten, while our system of measurement is based off powers of twelve
200
I have an unknown substance that is at a low temperature but medium pressure. What phase might I be in? explain your answer!
What is Solid OR liquid (accepting both with explanation)
300
Is a change in phase a chemical change or a physical change?
What is a physical change
300
Define an element
Cannot be broken down any further by either physical or chemical methods. Pure substance.
300
An unknown substance is heated to 500 degrees Celsius and the pressure on the system is increased from 1 to 2 atmospheres. What is the likely phase of the unknown substance?
What is a gas
300
Mr. R's dog ran away from home. Luckily, Mr. R found her 7.8 miles away from his house. How many inches away from his house was the dog?
What is 494208 inches
300
I have a liquid in a container. If I increase the pressure, what will happen to the liquid? What will happen to the temperature of the container?
What is liquid will form a solid. The temperature will increase
400
Classify the following as a physical property or a chemical property: 1. aluminium has a silvery color 2. gold has a density of 19 g/cm^3 3. sodium ignites when dropped in water 4. water boils at 100 degrees Celsius 5. Mercury reacts with hydrogen to produce MgH
What is 1. physical 2. physical 3. chemical 4. physical 5. chemical
400
Draw a heterogeneous mixture
What is SEE BOARD
400
True or false: the phase you are in does NOT depend on changes in temperature and pressure
What is FALSE
400
Chris was shooting hoops the other day. He measured that the distance from the three point line to the basket was 17.2 feet. If Chris went to the Euroleague to play basketball, how far away would the rim be in MILLImeters?
What is 524,256 millimeters
400
List at least three indicators that a chemical change has taken place
What is 1. change in color 2. creation of a gas 3. change in temperature (release heat)
500
List three physical properties of tap water
What is 1. color is translucent 2. has a density of 1.0 g/mL 3. Ductility. Can conduct electricity
500
True or false: A mixture is the chemical bonding of two or more substances in any proportion
What is FALSE. mixtures are a blend of physical substances, not a chemical bonding of substances
500
what is the relationship between temperature and energy? In other words, what happens to our energy when we increase the temperature? WHY??
What is the energy will increase because the particles in a solution will be moving around more rapidly, meaning bonds have been broken and have released energy
500
5. The pull of gravity on earth is 9.8 meters per second. What does that equal in miles per hour?
What is 22.05 miles/hr
500
8.Unknown substance A is the same throughout but can be separated without a chemical change. Unknown substance B is the same throughout but cannot be separated AT ALL. What can you conclude about A and B a. A is a compound, B is an element b. A is a mixture, B is a compound c. A is an element, B is a compound d. A is a mixture, B is an element
What is D
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