1. PLE SLO Test Review

2. Technetium Tc 98.907 43 1. Chemical Name ____________
Element Key Review
1. Chemical Name ____________
2. Chemical Symbol _________
3. Atomic Mass___________
4. Atomic Number __________
Technetium Tc
98.907 43

3. Give 3 properties of ACIDS. Give 3 properties of BASES.
5. Taste sour
8. Taste bitter
6. Change blue litmus paper red
9. Change red litmus paper blue
7. React with metals to make hydrogen gas
10. Feel slippery
Could also include that bases dissolve oils and fats, have a pH of more than 7, and they conduct electricity
Could also include that acids have a pH of less than 7 and acidic solutions conduct electricity

4. pH Scale Review

5. Periodic Table Group Review
Letter
Group Number?
Family Name? A
11.
12. B
13.
14. C
15.
16. D
17.
18. B C
Alkali Metals 1
Alkaline Earth Metals 2 17
Halogens 18
Noble Gases

6. The diagram to the right shows how nitrogen constantly moves through the soil, water, and atmosphere. Would you consider this an open or closed system? Explain your answer.
The Nitrogen cycle is an OPEN SYSTEM because the nitrogen atoms are not sealed in or closed off; they are constantly moving from place to place.

7. 21. Which of the following human activities would help support the natural wildlife in our community? Circle all that apply.
Over-fishing a local stream
Planting trees and other green plants
Zoning the land for a small wildlife park
Picking wildflowers on the side of the highway
Picking up trash on the shore line
Making a campfire on the beach

8. Match each picture with the appropriate description of the energy transformation.
(plugged-in) alarm clock
(battery-powered) fan
(natural gas-powered) stove
What is the Item?
Description
22.
changes chemical energy into mechanical and sound energy
23.
changes electrical energy into sound and radiant energy
24.
changes chemical energy into thermal and radiant energy
battery-powered fan
plugged-in alarm clock
natural gas- powered stove

9. What do all types of waves transfer from one location to another. (25
ENERGY

10. A watershed is the area of (26. ) __________ that supplies (27
A watershed is the area of (26.) __________ that supplies (27.) ____________ to a river system.
land
water

11. mesosphere stratosphere troposphere thermosphere
Description
Troposphere, Stratosphere, Mesosphere, or Thermosphere
This layer burns up most meteoroids
28.
This layers contains the ozone layer
29.
This layer is where most of our weather occurs
30.
This layer blends gradually with outer space
31.
mesosphere
stratosphere
troposphere
thermosphere

13. The atmosphere protects us from dangerous UV radiation.
List FOUR reasons why our atmosphere is so important to life on planet Earth.
32.
33.
34.
35.
The atmosphere contains oxygen and other gases that living things need.
The atmosphere traps the sun’s heat making the Earth warm enough for liquid water.
The atmosphere protects us from dangerous UV radiation.
The atmosphere prevents most meteoroids from hitting Earth’s surface.

14. You are sitting on a lawn chair enjoying a nice glass of iced tea
You are sitting on a lawn chair enjoying a nice glass of iced tea. You notice that the ice cubes are disappearing and that tiny water droplets start forming on the outside of your glass.
Water droplets on the outside of your glass represent which change of state?
36. ____________________
Solid ice cubes become liquid water during which change of state?
37. ____________________
condensation
melting

16. Read each description and put an X in the correct column.
Description of Pollution
Point Source
Non-Point-Source
38. This type of pollution comes from a single known location.
39. This type of pollution comes from unknown locations.
40. A semi wrecks and spills chemical waste into a local stream.
41. Pesticides run off corn fields into small creeks and streams. X X X X

18. CONDUCTION, CONVECTION, OR RADIATION?
By which process are the street and grass warmed?
42. _________________
By which process is thermal energy moving through the air (rising hot air and sinking cool air)?
43. ___________________
radiation
convection

20. pioneer mosses lichens
The first species to populate an area that has been totally destroyed is called the 44. ________ species. Generally, the first organisms that begin growing on the rocks are 45. _________ and 46. ________.
pioneer
mosses
lichens

21. the number of succulents the number of lizards
In the desert, insects and kangaroo rats eat succulents (simple plants that can survive the lack of precipitation). Lizards eat insects and desert foxes eat kangaroo rats. Red-tailed hawks use the succulents to build nests for their eggs.
Which factor will limit the number of red-tailed hawks? Circle one.
47.
the number of insects
the number of succulents
the number of lizards

22. 48. Circle the definition that best describes a decomposer.
An organism that takes oxygen and puts it back in the atmosphere. An organism that breaks down substances and returns the minerals to the soil.

23. Organisms that are well-suited for their environment are more likely to survive and pass on those “good traits” to their offspring. What is this process called?   49. _____________________
natural selection

24. 50. Cattle egrets are birds that follow livestock as they move through the fields. As the livestock walk, they kick up insects and the cattle egrets eat them. Which type of relationship is this?   mutualism or commensalism