energy Flashcards

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1
Q

true/false
humans do not respire

A

false

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2
Q

true/false
plants only photosynthesize

A

false
plants carry out both processes

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3
Q

photosynthesis
CO2 + water –(w/ sunlight)–>____ + O2

A

glucose

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4
Q

respiration
glucose + oxygen —>____ + carbon dioxide +water

A

energy

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5
Q

what is the stored version of sugar

A

starch

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6
Q

true/false
energy is never created or destroyed

A

true
it is always transferred to other forms

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7
Q

list potential energy

A

chemical potential energy, gravitational potential energy, elastic potential energy

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8
Q

list kinetic energy

A

electrical energy, sound energy, light energy, heat energy

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9
Q

what affects the amount of gravitational potential energy

A
  • height from ground
  • its mass
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10
Q

state the energy conversion when a battery is used in a closed circuit with a bulb

A

chemical potential energy–> electrical energy –> light energy + heat energy

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11
Q

state the energy conversion when switching on the television

A

electrical energy –> sound energy + light energy + heat energy

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12
Q

true/false
fossil fuels can be replenished

A

false
fossil fuels are non-renewable, limited natural resources

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13
Q

y r wind turbines, hydroelectric power plants better than fossil fuels

A

they r renewable sources of energy unlike fossil fuels

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14
Q

what causes global warming

A

deforestation and burning of fossil fuels

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15
Q

list all types of energy

A

heat energy, sound energy, gravitational potential energy, kinetic energy, elastic potential energy, chemical potential energy, light energy

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16
Q

what affects GPE

A

height from the floor and mass