Science Pages 9-16 Flashcards
Systems
System
A set of parts that work together, they need energy to work
Potential energy
Stored energy
What is energy measured in?
It is measured in kilojoules… A kilojule = 1000joules
Kinetic energy
The energy in moving things ( moving energy )
Mechanical energy
Non living system with moving parts ( energy can be transferred to different parts of the system )
Exp. of a mechanical energy system
potential energy in leg muscles - kinetic energy in legs - * kinetic energy in pedals* - kinetic energy in wheel s - bicycle moves forward
Thermal system + 2exp
A system that stores and transfers heat etc. Geyser/hot water cylinder
Electrical system + 1exp.
A system that uses electrical energy 2 work etc. Torch
Biological system
(living organism) potential energy that comes from organisms food
Give an exp. Of a biological system
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
Energy transfer in a food chain
Stored energy is transferred from 1 living organism 2 the next
Give an exp. Of an energy transfer in a system
CABBAGE 🥬- snail🐌-GUINEA FOWL🐦-jackal 🦊
