1. Chemical / Physical Properties Chemical / Physical Changes
This is Jeopardy!!!
Chemical / Physical Properties
Chemical / Physical Changes
Molecular Energy
Chemical Reactions
Misc. 10 20 30 40 50

2. Which of the following is true of chemical properties?
a) They describe the phase the substance.
b) They describe characteristics of a substance such as size, color, and shape.
c) They explain how the substance reacts with other substances.
d) They describe what chemical changes substance is currently going through.
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3. a) The new substance forms into thin flat sheets.
Which of their statements would be an inference about a chemical property?
a) The new substance forms into thin flat sheets.
b) The new substance is smooth.
c) The new substance will tear easily.
d) The new substance looks like it will dissolve in acid easily.
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4. What is one way that a plastic soda bottle is better than a glass one?
a.     It is transparent
b.     It doesn’t flavor the drink
c.     It is recyclable
d.     It doesn’t shatter

5. Both hydrogen and oxygen are flammable
Both hydrogen and oxygen are flammable. Water is made up of 2 parts Hydrogen and 1 part Oxygen, why doesn’t water burn?
a.     Water will burn if you get it hot enough.
b.     Because water is a liquid and hydrogen and
oxygen are gases.
c.     When elements combine physically they form new
substances with different properties.
d.     When elements combine chemically they form new substances with different properties.

6. A cube of sugar has the following properties.
1. Mass = 2 grams
2. Density = 8 g/cm3
3. Burns when heated
4. Composed of small, white crystals
5. Bubbles and fizzes when heated
Mark each of the following above as a physical property (P) or a chemical property (C).

7. As Terry and Jean poured melted chocolate over their ice cream, they noticed that it became hard. They could assume that:
a.     The chocolate had changed phases, which is a physical change.
b.     The chocolate had changed phases, which is a chemical change.
c.     The chocolate had changed into a new substance, which is a physical change.
d.     The chocolate had changed into a new substance, which is a chemical change.

8. Which of the following is an example of a physical change?
a. evaporation in a swamp cooler
b. electricity produced by a dry cell
c digestion of a hamburger
d. rusting of a car body

9. a. one or more chemical changes had taken place.
During an experiment Joe mixed two chemicals together. The chemicals smoked and a very strange odor came from them. This indicated that:
a. one or more chemical changes had taken place.
b. one or more physical changes had taken place.
c a color change was going to happen next.
d. the molecules had diffused throughout the mixture.

10. Which of the following is an example of a chemical change?
a. Baking soda in vinegar
b. Freezing water
c. Bending steel
d. Sawing a board

11. When you turn up the thermostat on your furnace several things happen
When you turn up the thermostat on your furnace several things happen. Which of these would be considered a chemical change?
a.     Air circulates throughout the room.
b.     Fuel in the furnace burns.
c.     The temperature in the room increases.
d.     Heat in the room rises.

12. Which physical change does a swamp cooler use to cool the air?
a. Gas to liquid
b. Liquid to gas
c. Liquid to solid
d. Solid to liquid

13. Toniqua and Juan decide to do an experiment
Toniqua and Juan decide to do an experiment. One of them will put a drop of food coloring in hot water; the other will put a drop of food coloring in cold water. Based on your knowledge of energy and the motion of particles in a substance, predict the results of their experiment.
a) The coloring will move through both containers of water at the same speed because water always has the same energy.
b) The coloring will move through the cold water faster because cold water has more energy.
c) The coloring will move through the hot water faster because hot water has more energy.
d) The coloring will float on top of the water until your put energy into it by stirring it.

14. As warm air rises, it cools, condenses and freezes in the upper atmosphere. What happens as it falls back to Earth?
a. It undergoes a chemical change from solid to gas
b. It undergoes a physical change from solid to gas
c. It undergoes a chemical change from a solid to liquid
d. It undergoes a physical change from solid to liquid
e. It undergoes no chemical or physical change

15. At which point do molecules have the most energy?
When it is a solid
When it is a liquid
When it is a gas
When it undergoes sublimation

16. Describe the difference between chemical energy and heat energy

17. One hot August afternoon you spill your ice water on the sOne hot August afternoon you spill your ice water on the sidewalk, and you watch the ice quickly start to melt. Sometime later, you walk by again but there is no sign of your spill. Which drawing below best shows what happened to the ice? a. b. c. d.

18. Acid rain is found in parts of the country where there are many cars and power plants. Water in the form of rain is chemically combined with sulfur dioxide and oxygen to create sulfuric acid, which becomes acid rain.
In the reaction above, which substances are considered the reactants?
a.     sulfur dioxide, oxygen, and water
b.     oxygen, water, and sulfuric acid
c.     water, sulfuric acid and sulfur dioxide
d.     sulfuric acid, sulfur dioxide, and oxygen

19. Briefly describe the photosynthetic chemical reaction and clearly explain about the reactants and the products.

20. For a chemical reaction to occur, molecules must come in contact with each other. Describe the chemical reaction of respiration in detail.

21. Acid rain is found in parts of the country where there are many cars and power plants. Water in the form of rain is chemically combined with sulfur dioxide and oxygen to create sulfuric acid, which becomes acid rain.
In the reaction above, which substance is considered the product of the reaction?
a.     sulfur dioxide
b.     water
c.     oxygen
d.     sulfuric acid

22. As Terry mixed some kool-aid for her little brother, she noticed that as the powder mixed into the water that the water changed to the same color as the powder. She could assume that:
a.     the flavoring dissolved into the water, which is a physical change.
b.     the flavoring dissolved into the water, which is a chemical change.
c.     the flavoring created a new substance, which is a chemical change.
d.     the flavoring created a new substance, which is a physical change.

23. While investigating the chemical and physical properties of a new substance created in class, Sally and Tyler record the following observations:
a) The new substance is solid.
b) The new substance is smooth.
c) The new substance will burn.
d) The new substance looks like it will tear easily.
e) The new substance looks like it will dissolve in acid easily.
Which are examples of physical properties? Which are chemical?

24. Give 3 examples of a chemical change

25. Give 3 examples of a physical change

26. What is one way the development of synthetic fibers has affected the clothing we wear?
a. synthetics are waterproof
b. synthetics have more stretch
c. natural fibers wear longer
d. synthetics don’t burn