Name _______________________________________ Due Date ____________
CBA 2 Review 2013-2014
Topics to Review:
 Unit 12: Ecosystems
 Unit 2: Physical Properties of Matter
 Unit 3: Elements and Compounds
Where to find answers: Science Journal, Notes, and Labs from entire 9 weeks, Test Reviews, Textbook
Ecosystems
Define the following terms
1. Organism2. Species3. Niche4. Habitat5. Community6. Population7. EcosystemAnswer the Questions
8. What is the difference between a niche and a habitat?
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9. List 3 Biotic Parts of an Ecosystem
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10. List 3 Abiotic parts of an Ecosystem
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11. How do biotic and abiotic parts of a system interact? Name an example.
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12. List 2 Biotic and 2 Abiotic factors in a desert environment.
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13. Put the following terms in order from most specific to most broad
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Community, Population, Organism, Ecosystem
Physical Properties
14. What is the difference between a physical change and a chemical change? give an example of each
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15. List some physical properties used to describe metals, nonmetals, metalloids. (from Metals lab sheet or Notes)
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16. List some physical properties used to describe Minerals (from Mineral lab sheet or Notes)
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17. A property is likely a metal if it is ________________________________ , _____________________________,
____________________________________________ , ______________________________________, and
____________________________________________. (list properties specific to that type of matter only)
18. A property is likely a nonmetal if it is ______________________________ , _____________________________,
____________________________________________ , ______________________________________, and
____________________________________________. (list properties specific to that type of matter only)
19. If a substance has some qualities of metals and some qualities of nonmetals it is likely a ___________________.
20. Jenson needs a low density material that does not conduct electricity and is not malleable, should she use a
metal, nonmetal, or metalloid? _____________________________________________________________
21. When matter changes states, such as a liquid changing to gas, is it a physical change or a chemical change?
Explain why or why not and give an example.
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22. What is the formula for density and how do you enter a density problem into the calculator correctly?
23. Nicholas wants to know what his favorite hammer is made from, so
he decides to test its density. Use the tools provided to help him
identify the metal. The mass he measured was 750 grams. The
volume he measured was 94.93 milliliters.
What 2 tools did he use to find the density in this example?
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Density of Common Metals
Type of Metal Density (g/cm3)
Brass 8.40
Copper 8.90
Gold 19.30
Iron 7.80
Lead 11.30
Nickel 8.80
Steel 7.90
Solve and show your work below (always write the formula first!)
What metal is his hammer made of? ______________________________________
Why can density be used to identify the metal? _____________________________________________________
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24. Bethany has a regular solid cube that is 5cm on one side. The cube weighs 300 grams. What is the density of the
cube? Show your work (always write the formula first!)
25. What is water displacement? How do you find it? What tool does it involve? When do you use it?
26. The 3 blocks are made of different substances. They have the same length, width, and height.
Circle the correct choice for each statement.
-
The blocks would have [same]
[different]
mass.
-
The blocks would have [same]
[different]
volume.
-
The blocks would have [same]
[different]
density.
Lead
Sodium
Gold
27. The 3 different size blocks each have the same mass- 100 grams.
Circle the correct choice for each statement.
-
The blocks would have [same]
[different]
mass.
-
The blocks would have [same]
[different]
volume.
-
The blocks would have [same]
[different]
density.
100g
100g
100g
28. In question 27 above, which block would have the least density? Explain how you know. Use the room to work.
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29. In questions 27, are the blocks made from the same or different substances? Explain your reasoning
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30. Vanessa has a bottle of oil and water salad dressing. After she shakes it up to use it, she notices that 5 minutes
later, the oil and water have separated again into two layers, the oil on top and the water on bottom. What
physical property causes this to happen? __________________________________________________________
Can the same thing happen with solids, such as rocks or metals? ______________________________________
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31. Write an appropriate answer in the missing places (?) on the data table below.
Group 1
Group 2
?
Hydrogen
Water
Peas and Carrots
Carbon
Exhaled breath
Fruit Salad
?
Sugar
Pico de Gallo (salsa)
32. On the periodic table, label the 3 sections
- Metals
- Nonmetals
- Metalloids
Hint: Use page 605 in book
Elements and Compounds
33. What is the difference between Nitrogen and Air?
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34. What’s the difference between a compound and a molecule?
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35. In the formula H11N6S3 what do H, N, and S stand for?
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36. In the formula H11N6S3 what do the little numbers represent and what are they called?
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37. Identify the following symbols as elements, compounds, or mixtures.
Ca
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CaCl
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CO
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C and O
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38. Write the Symbol for the following 11 elements- memorize for test
Hydrogen
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Silicon
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Helium
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Phosphorus
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Oxygen
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Sulfur
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Nitrogen
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Carbon
________
Calcium
________
Chlorine
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Sodium
________
39. Circle the correct choice
Each individual element is made up of
[identical]
or
[different]
types of Atoms.
40. Circle the correct choice
Different elements are made up of
[identical]
or
[different]
types of Atoms.
41. Is it possible to change one element into another through physical or chemical changes? Why _________________________
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42. How many elements are in the chemical formula Li3He2CBK? ________________________________________________
43. What is the ratio (relationship) of Carbon atoms to Oxygen atom in CO2? _________________________________________
44. What are the 5 evidences of chemical change? (Mnemonic: City Girls Love Their Phone)
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