Science Pages 9-16 Flashcards

Systems

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1
Q

System

A

A set of parts that work together, they need energy to work

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2
Q

Potential energy

A

Stored energy

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3
Q

What is energy measured in?

A

It is measured in kilojoules… A kilojule = 1000joules

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4
Q

Kinetic energy

A

The energy in moving things ( moving energy )

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5
Q

Mechanical energy

A

Non living system with moving parts ( energy can be transferred to different parts of the system )

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6
Q

Exp. of a mechanical energy system

A

potential energy in leg muscles - kinetic energy in legs - * kinetic energy in pedals* - kinetic energy in wheel s - bicycle moves forward

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7
Q

Thermal system + 2exp

A

A system that stores and transfers heat etc. Geyser/hot water cylinder

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8
Q

Electrical system + 1exp.

A

A system that uses electrical energy 2 work etc. Torch

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9
Q

Biological system

A

(living organism) potential energy that comes from organisms food

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10
Q

Give an exp. Of a biological system

A

HORSE EATS HAY- stores energy from food in its body-WHEN HORSE MOVES THE POTENTIAL ENERGY CHANGE S TO KINETIC ENERGY- horse uses kinetic energy to pull cart

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11
Q

Energy transfer in a food chain

A

Stored energy is transferred from 1 living organism 2 the next

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12
Q

Give an exp. Of an energy transfer in a system

A

CABBAGE 🥬- snail🐌-GUINEA FOWL🐦-jackal 🦊

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