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Science 11 > Science 11 > Flashcards

Science 11 Flashcards

1
Q

Which science disciplines contribute to the field of environmental science?

A

Physical, biological an informational sciences

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2
Q

What did Hunter- gatherers do to alter the environment

A

Set fires to the prairies

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3
Q

Which periods in history where the main contributors to the environmental problems?

A

Industrial revolution

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4
Q

What is the definition of environmental science

A

It is the study of relationships of the natural world and the relationships between organisms and their environments

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5
Q

Population growth in the 20th century contributed to which environmental problems?

A

Resource depletion, pollution and habitat destruction

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6
Q

Why is the loss of biodiversity a concern?

A

Declining number and variety of species in an area

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7
Q

What does the law of supply and demand describe?

A

Describes the relationship between an items availability and its value

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8
Q

How do developing countries compare to developed countries?

A

Developed countries have access to food, high levels of education and employment And high average income.

Developing countries do not have access to healthcare and have unsafe food and water sanitation.

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9
Q

What does achieving a sustainable world depend on?

A

Responsible consumption by developed countries and cooperation between government industry and citizens

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10
Q

Solar energy is contained in ___________?

A

Fossil fuels

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11
Q

Which countries consume the most energy per person?

A

United States and Canada

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12
Q

The energy in fossil fuel’s is often converted _________?

A

Electricity

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13
Q

What are the consequences of nuclear energy?

A

Radioactive waste

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14
Q

Where was the most serious nuclear accident in the United States?

A

Three mile Island in Pennsylvania

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15
Q

What is another name for crude oil?

A

Petroleum

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16
Q

Describe the process of nuclear fission.

A

Fission is the process of an atom splitting into two

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17
Q

What are the advantages of nuclear energy?

A

Reduces the amount of energy generated from fossil fuel’s

18
Q

What are the badges of using fossil fuel’s for energy?

A

Large amounts of energy, easy to get, easy to transport.

19
Q

Which states have the most cold deposits?

A

Wyoming, West Virginia, Kentucky, Pennsylvania, Montana

20
Q

What is the disadvantage of internal combustion engines?

A

Pollution, noise, and size

21
Q

How are nuclear fission and nuclear fusion different?

A

Fusion is the process work two or more Atoms glad version is the process of an Atom splitting into two

22
Q

What is the definition of environment?

A

The surrounding or conditions a person plant or animal lives in

23
Q

How many humans are in the world?

A

7 billion

24
Q

What factors contribute to the US high usage of gasoline

A

The great recession, gasoline prices and rising incomes

25
Q

What is the origin of all and natural gas?

A

Sedimentary basins

26
Q

What percentage of the worlds electricity comes from nuclear energy?

A

14%

27
Q

What are solar collectors and are they considered to be passive or active?

A

They capture sunlight and transform radiant energy into heat energy. They are passive.

28
Q

What is the fastest growing source of energy in the world?

A

Wind

29
Q

What is biomass fuel and what is the major source in developing countries?

A

Organic materials produced in a renewable matter

Wood.

30
Q

How does a photovoltaic cell work?

A

When light energy strikes the solar cell, electrons or knocked loose from the Atoms in the semiconductor material. If electrical conductors are attached to the positive and negative sides, forming an electric current, the electrons can be captured in the form of an electric current. That is electricity.

31
Q

How can people conserve energy in there every day lives?

A

It’s a light homes, use less resources. Wash clothes in Cold water

32
Q

What is geothermal energy?

A

Heat energy generated and stored in the earth

33
Q

What is passive energy?

A

Energy that is directly harnessed to achieve a desired goal.

34
Q

Give three examples of biomass fuel

A

Animal waste, human waste, wood

35
Q

Give 4 sources of renewable energy.

A

Solar, wind, Hydro and biomass

36
Q

What does ocean thermal energy conservation used to produce electricity

A

Uses the temperature difference between the cooler deep water in the warmer shallow water to run a heat engine

37
Q

What are the different sources of alternative energy

A

Hydro, Wind, solar, geothermal and bio

38
Q

What are the problems with using hydrogen as a fuel today?

A

Expensive, difficult to store, highly flammable

39
Q

What percent of the energy used in the United States is wasted?

A

84%

40
Q

Are hybrid cars energy efficient? What type of engines to the use?

What type of engines do they use?

A

Yes. Internal combustion engine

41
Q

What are the advantages of using hydrogen as a fuel source?

A

Renewable, clean energy, non toxic and energy efficient

42
Q

What is the definition of energy efficieny

A

Using less energy to provide the same service

Science 11 (1 decks)

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