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Old science to be edited > Energy > Flashcards

Energy Flashcards

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Biology 101 flashcards
1
Q

How much energy does an Apple have?

A

150 KJ ***??

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2
Q

How much energy in 10 potato crisps?

A

2225 KJ

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3
Q

What are Macronutrients?

A

nutrients required in large amounts

  • carbohydrates
  • fats
  • proteins
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4
Q

What are Micronutrients?

A

nutrients only required in small amounts

  • minerals
  • vitamins
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5
Q

What does fibre do?

A

Cleans intestines

**check

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6
Q

What does water do?

A

Keeps the body hydrated

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7
Q

What do carbohydrates do?

A

provide an energy source that is quickly converted

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8
Q

What are fats?

A

a concentrated energy source stored by the body for long term energy supplies and warmth

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9
Q

What do proteins do?

A

builds, repairs and renews body tissues

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10
Q

What do minerals do?

A

provide essential simple chemicals

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11
Q

What do vitamins do?

A

carry out specific bodily processes

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12
Q

What happens when the energy in (consumed) is less than the energy out (used)?

A
  • tiredness
  • stunted growth
  • weight loss
  • bone fragility
  • susceptible to illness
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13
Q

What happens when the energy in (consumed) is equal to the energy out (used)?

A
  • balanced diet
  • sensible exercise
  • healthy!
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14
Q

What happens when the energy in (consumed) is greater than the energy out (used)?

A
  • tiredness (extra weight)
  • heart problems
  • obesity
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15
Q

Why do we need food?

A

We use the energy obtained from food to fuel our bodies for growth, repair and movement. How much energy we need is determined by our gender, age and activity level.

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16
Q

Define conduction

A

Conduction occurs when particles collide with each other and transfer heat energy.

17
Q

Define convection

A

Convection is the movement of particles from an area of higher temperature to an area of lower temperature. As particles gain energy, they become less dense and rise.

18
Q

Define radiation

A

Transfer by radiation involves energy travelling as waves from one place to another without using matter

19
Q

Insulator

A

a substance that prevents or slows the transfer of heat energy

20
Q

Active energy

A

Energy in motion

21
Q

Potential energy

A

stored energy that is not in motion

22
Q

What is a fossil fuel

A

a source of energy where there is a finite supply, e.g coal.

23
Q

What is a renewable energy source

A

an energy source that replaces itself faster than it gets used up

Old science to be edited (4 decks)

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