Heat And Temp. Topic 7-8 Flashcards

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1
Q

Chemical energy

A

Essentially stored thermal energy
When burned can produce large amounts of thermal energy
Example wood and coal

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2
Q

Electric energy

A

Can we produce many different ways
Hydroelectric dams are use the energy of falling water to produce electrical energy
has a negative impact on wildlife and their habitats
Also affects livelihood of people who work or live in the area
Example hydroelectric dams, generating stations

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3
Q

Mechanical energy

A
Forced that push or pull objects often release thermal energy FRICTION 
example 
car brakes 
tires 
bike pump 
skidding tires 
rug burn
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4
Q

Geothermal energy

A
Natural source of energy from the earth 
can be harnessed to produce electrical energy 
example 
volcanos 
hot springs 
and geysers
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5
Q

Solar energy

A

Energy from the sun is a clean source and will never run out these are times when it is not available night two forms active and passive
Active: use solar collects along with fan to distribute stored thermal energy usually in a liquid throughout a home or building
example solar panels
Passive: uses materials in a structure to absorb store and release
example wall of windows in a house or greenhouse

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6
Q

Wind

A

The energy of moving air
It results from convection currents through solar energy (heating and cooling air)
Example using wind turbines to produce electricity

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7
Q

Nuclear

A

Energy required to split up Adams
massive amounts of energy released
when there is a malfunction disaster can strike
Example Chernobyl

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8
Q

What are the problems with fossil fuels

A

1 they are nonrenewable resource( takes millions of years to form)
2 when burned it produces carbon dioxide which overloads our CO2 recycling systems

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9
Q

What is global warming

A

Greenhouse gases and carbon dioxide trap thermal energy above the earth causing an increase in overall temperature can change climate zones and their plant growing dry up rivers and lakes even could melt the polar ice cap

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10
Q

What is cogeneration

A

The process of using thermal pollution waste heat that accidentally warms the environment to generate electricity or heat buildings example waste heat from a factory that can be transferred to other buildings to heat and power that this requires the use of heat to heat exchanger similar to a car radiator

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11
Q

Why does Alberta continue to use fossil feels

A

There is an abundance of fossil feels in Alberta and this helps with our economy. It produces 80% of our electrical energy.

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12
Q

List three ways we can save money and energy at home

A

Turn the lights off in a room when you’re not present
LED lightbulbs versus hologan lightbulbs
Be aware of how long we are showering or using resources

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13
Q

What are refrigerants

A

Liquids that evaporate easily at low temperatures to remove thermal energy from food

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14
Q

What are some dangers associated with thermal energy

A

Fire burning ourselves
Forest fires harmful

chemicals and pollution

Drought floods etc.

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15
Q

What are 3 by-products of thermal energy

A

Sulfur dioxyde (H2S)- irritating to the eyes nose and throat especially to people with asthma

Carbon monoxide (CO2) colourless 
Oderless and ethal 

Carbon dioxide(C02) greenhouse gas

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