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science > Physical Science > Flashcards

Physical Science Flashcards

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1
Q

What is energy?

A

Energy is the capacity to work

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2
Q

What are the different types of energy?

A 
Kinetic
Light 
Sound 
Heat
Electrical
Chemical
Nuclear
Elastic potential
Gravitational potential
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3
Q

What are the two main groups of energy?

A

Stored and active

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4
Q

Potential energy calculation

A

PE=mgh

Mass, Gravity,Height

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5
Q

Kinetic energy calculation

A

KE=1/2mv squared

Mass,Velocity

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6
Q

What is in the active energy group?

A 
Kinetic 
Light
Sound
Heat
Electrical
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7
Q

What is in the stored energy group?

A

Chemical
Nuclear
Elastic potential
Gravitational potential

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8
Q

What is conduction?

A

Is when heat energy is transferred by particles vibrating faster and bumping into each other

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9
Q

What is convection?

A

Is when heat energy rises because particles vibrate faster making the hot liquid/gas less dense. As it cools, particles slow down and the liquid/gas becomes more dense

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10
Q

What is radiation?

A

Is the transfer of heat energy through wavelengths.

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11
Q

What are the three types of radiation?

A

Transmitted
Absorbed
Reflected

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12
Q

What happens when radiation is transmitted?

A

It goes through the object

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13
Q

What happens when radiation is absorbed?

A

It takes the radiation into the object

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14
Q

What happens when radiation is reflected?

A

It bounces off the object

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15
Q

What is energy transformation?

A

This is when a for of energy changes into another form of energy.
Eg.kinetic-potential,potential-kinetic

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16
Q

What is the” law of conservation of energy state”?

A

It states that no energy Canberra created or destroyed but only transferred from one thing to another

17
Q

What are renewable energy resources?

A

Sources that can be renewed/reused

Eg. Solar, hydro,wind

18
Q

What are non-renewable energy resources?

A

Sources that can not be renewed/reused

Eg. Coal, fossil fuels, nuclear

19
Q

What are some of the main reasons the stove was built

A

Prevent women from getting assaulted
Less work for collecting wood
Better cooking conditions in Ethiopia
Reduces exposure to indoor smoke

20
Q

What are some of the advantages of the stove

A

50% less smoke
Less gas
Produces more heat
Traps particulate and contains it

21
Q

What are some of the disadvantages of the stove

A

Costly
You need to be trained to use it
Harder to use than the three stone fire method
Transporting is hard

22
Q

What are some of the main reasons the stove was built

A

Prevent women from getting assaulted
Less work for collecting wood
Better cooking conditions in Ethiopia
Reduces exposure to indoor smoke

23
Q

What are some of the advantages of the stove

A

50% less smoke
Less gas
Produces more heat
Traps particulate and contains it

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