1. June 5, 2017
Objective: I can describe how the actions of humans impact the environment.
Launch:
Homework:
Cumulative Castle Learning assignment DUE TODAY JUNE 5.
Read chapter 24 pages Answer questions 1-27 on p DUE WED.

2. Launch

3. Launch

4. Human Impact on the Environment

5. Natural Resources
Nonrenewable (finite supply) – A resource that can not be replaced as quickly as it is used because it takes billions of years to reform.
Example: fossil fuels such as oil, natural gas, coal & minerals

6. Natural Resources
Renewable – A resource that can be replaced as quickly as it is used.
Example: Food, solar energy, wind, hydroelectric.

7. Habitat Destruction What is it?
Humans take over land to build roads, homes and factories. Can use the land to grow food.
Causes
Human population growth

8. Negative Impact on Environment
Loss of biodiversity
Unbalanced ecosystems
Future inability to find new medicines
Solutions to problem
Passing laws to limit the destruction of forests

9. Deforestation What is it?
Destruction of forests resulting from human activity (burning or cutting down).
Causes
Human population growth
More land needed to build on

10. Negative Impact on Environment
Loss of biodiversity
Solutions to problem
Reforestation: planting more trees to replace the ones cut down

11. Loss of Biodiversity What is it?
A reduction in the number of different species in an ecosystem
Causes
Over-hunting or over-fishing in one area
Habitat destruction or deforestation

12. Negative Impact on Environment
Unbalanced ecosystems
Reduces ability to discover and producing new medicines.
Solutions to problem
Enforce conservation laws that limit hunting and fishing
Protect endangered animals by placing them in sanctuaries.

13. June 6, 2017
Objective: I can describe how the actions of humans impact the environment.
Launch:
Review book Exam 1
p. 15 q
Homework:
Read chapter 24 pages Answer questions 1-27 on p DUE WED.

14. Launch Review Book exam 1 p. 15 q 61-65

15. Launch Review Book exam 1 p. 15 q 61-65

16. Launch Review Book exam 1 p. 15 q 61-65

17. Launch Review Book exam 1 p. 15 q 61-65

18. Launch Review Book exam 1 p. 15 q 61-65

19. Invasive or Imported Species
What is it?
Introduction and release of a species from one environment to another that overtakes the area.
Causes
Humans import new species from other ecosystems
May be accidental or intentional

20. Example of imported species…
Japanese beetle (New York) – accidentally released in the U.S. and now are pests in the New York region because there is not a natural enemy to keep the population in check

22. Rabbits (Australia) – released 2 dozen rabbits in Australia in 1859, by 1953 more than a billion rabbits populated Australia and ate massive amounts of vegetation available to native species

23. Negative Impact on Environment
New species have NO natural enemies (predators) and rapidly overproduce and eliminate native species
Solution to Problem
Use chemicals to destroy imported species. This may lead to accidental killing of native species.
Sterilization or introduce natural predators.

24. Biological controls of insects
Introduction of natural enemies
(ex. praying mantis)
Use artificial sex hormones to lure insects to their death (pheromones)
(ex. gyplure -- male gypsy moths)
Sterilization and release of male insects
(ex. irradiation of screwworm fly w/cobalt-60)
Note: The screwworm fly only gets to mate once, so she is out of luck if she mates with a sterile male!!

25. Methods to controlling harmful insects
Chemical controls (insecticides)
The pesticide DDT:
Was thought safe in the 1950s
Is known to be toxic today
But is used widely in Africa to combat malaria

26. The Use of Pesticides
Agriculture and the environment
Why are pesticides and antibiotics dangerous to ecosystems? To humans?

27. Thermal Pollution
What is it?
Water temperatures in lakes and rivers rise above normal temperatures
Causes
Power plants and industries release warmed water into rivers, lakes and oceans.

28. Negative Impact on Environment
Warm water holds less dissolved oxygen and some species can suffocate.
Solution to Problem
Find other ways to deal with warmed waste water.
Conserve energy by using less power

29. Global Warming (The Greenhouse Effect) Climate Change
What is it?
Gases, such as CO2, traps radiation and heat resulting in the Earth’s average temperature rising
Causes
The release of carbon dioxide when fossil fuels are burned for transportation and industry
Increased levels of methane gases in atmosphere

30. Negative Impact on Environment
Climate changes
Melting of polar ice caps and increased sea level, flooding coastlines
Solution to Problem
Reduce carbon dioxide levels by finding alternative energy sources
Drive hybrid cars, solar panels, carpool
Turn off lights when not being used

32. Ozone Depletion What is it?
The destruction of the ozone shield (a layer of gas that protects the Earth from sun’s radiation)
Causes
The release of gases called CFC’s (chlorofluorocarbons) used in aerosol cans and air conditioners.

34. Negative Impact on Environment
May destroy producers in the ocean
Abnormal radiation levels may lead to increased cases of skin cancer
Solution to Problem
Reduce the amount of CFC’s
Use energy efficient air conditioners

35. Acid Rain What is it? Rain water that has a low pH level Causes
The burning of fossil fuels release sulfur and nitrogen into the air & mixes with precipitation.

36. Negative Impact on Environment
Damages plants
Makes lakes acidic which kills algae and animal life
Solution to Problem
Reduce the use of fossil fuels
Use filters on
smoke stacks to
trap sulfur

37. Page 137 19. Hint Maintain quality 1 20. Hint greenhouse gases
21. Hint human activity most 3
25. Hint increased industrialization
26. Hint preserve biosphere 4
27. Hint alters equilibrium
28. Hint increased ecological interrelationship

38. Page 137 19. Hint Maintain quality 1 20. Hint greenhouse gases
21. Hint human activity most 3
25. Hint increased industrialization
26. Hint preserve biosphere 4
27. Hint alters equilibrium
28. Hint increased ecological interrelationship

39. Homework Page 130 17. Hint long-term solution 1
18. Hint methods of pest control 3

40. Homework Page 130 13. Hint positive effect
It controls insect populations without the use of toxic chemicals.
14. Hint increase rabbit population 4
15. Hint negative changes
16. Hint prevent extinct 3

41. Homework Page 130 9. Hint Laws are conservation 2
10. Hint reduction in habitat
With less room to find food and live, many would die.
11. Hint primarily
12. Hint least ecologically 4

42. Homework Page 126 & 130 5. Hint carrying capacity
Country B, because the population is leveling off and staying about equal with food production/acre.
6. Hint ladybugs predators aphids 4
7. Hint positive effect 3
8. Hint reducing flood damage

43. Homework Page 126 1. Hint renewable 1 2. Hint aluminum future 3
3. Hint limiting factors
4. Hint human activities

44. P. 137 #22
Burning fossil fuels affects the precipitation part of the water cycle. As rain falls through gases produced by burning coal, oil, and other fuels, the gases dissolve in it and form acid rain, which causes damage to organisms in many ways.

45. Launch Aug’14
81. 3
82. 1

46. HW Aug’
76. 2

47. Launch/HW Aug’

48. Launch/HW Aug’

49. P. 120
#41. Decomposers return basic materials such as nitrates and carbon dioxide to the ecosystem for reuse by other organisms. OR Decomposers recycle nutrients.

50. Page 120
#38. It is given off by plants and used by animals (plants and/or decomposers) or Oxygen is given off as a result of photosynthesis and used for respiration.
#39. Fish release carbon dioxide. Or Fish release nitrogenous waste products.
#40. Dead animals or dead plants, or wastes of the organisms.

51. P. 120
#37. Choice A is not a good one, because most of the energy stored in the corn fed to the chickens is lost, and very little would be stored in the chickens.
Choice C is not a good one either, for almost the same reason. The chickens use more energy from the corn than is available to you when you later eat either the chickens or their eggs.

52. Page 120
#37. Choice B is the best choice: the chickens have the most energy right away. Later, they will have used up some of their stored energy in the process of living, and lose a lot to the environment as heat. The longer you wait, the less energy you will get from them. The energy in the corn is being used very slowly if at all, so it can be eaten later.

53. Launch Page 120 #42
42. Different populations of prey in an ecosystem are controlled by different kinds of predators. OR More biodiversity in a ecosystem provides more stability.