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Energy :zap:, Food chewed into smaller pieces digested slightly by …
Energy :zap:
Uses and forms of energy
Needed by living things to live,grow and reproduce
Required to make things work or move
Forms of energy
Light
Properties
(Extra box)
Can partially pass through some materials
Cannot pass through some materials
Can pass through some materials
Can form shadows when it is partially or completely blocked by an object
Can be reflected
Travels in a straight line
Enables us to see objects
When the object is a source of light
When the object reflects light
Heat
Properties
Flows from hot to cold objects
until....
Both reach the same......
Causes things to contract when heat is lost
Makes things hot
Degree of hotness is called......
Temperature
Temperature is measured in.....
Degrees celcius
1 more item...
Rises when heat is gained
Drops when heat is lost
Can cause things to change in state
Example
Solid ice cube changing into liquid water
When a material gains heat it expands
Passes through some materials easily
These materials are called....
Good conductors of heat
For example
Metals
Does not pass through some materials easily
These materials are called.....
Lousy conductors of heat
Examples of such
Air
Plastics
Wood
Keeps us warm
Is needed in the growing of agriculture
Electricity
What is a basic electric circuit made up of
Wires
Function?
To act as a pathway for :zap: to flow through.
Made of ?
Insides
Usually copper
Why copper ?
1 more item...
Outsides
Usually rubber
Why rubber?
1 more item...
:bulb:
Function?
Light things up.
Anatomy?
:battery:
Function
The chemicals inside of it make :zap:
How?
When the :battery: are connected in a closed circuit,the chemicals react to produce :zap:.
Switch
Function?
To activate or de-activate an :zap: circuit.
Series and parallel circuits
Parallel
Advantages
You can control each bulb individually
When one bulb fuses,the other bulbs remain lit
Disadvantages
It uses more wire than series circuit
It uses more electricity than a series circuit
Anatomy of a parallel circuit
Where can parallel circuits be found in everyday life
2.Car headlights
3.Domestic lights
1.Street lights
Series
Advantages
1.They use less wires as compared to a parallel circuit
2.They use less electricity as compared to a parallel circuit
Anatomy of a series circuit
Disadvantages
2.If one bulb fuses,all the other bulbs also fuse
1.You cannot control them individually
Where can series circuits be found in everyday life?
3.Christmas lights
1.Lawnmower
2.Flashlight
Sources of light and heat
Sun :sunny:
Lighted lamp :bulb:
Fire :fire:
In :meat_on_bone:
Different types of energy
Carbohydrates
Vitamins
Proteins
:meat_on_bone::arrow_forward::zap:
Digested food in the bloodstream goes to all cells in the body
The cells in the body break down the food into basic components and convert it into energy.
ENERGY IS NOT MATTER
Food chewed into smaller pieces digested slightly by saliva
Stomach
Food is further broken down by digestive juices
Small intestine
Food is completely digested to become glucose(a type of sugar(which is another name for plant food AKA :zap:))
Cells
Travels in bloodstream
Glucose+Oxygen :arrow_right:Respiration:arrow_right: :zap:+Carbon Dioxide+ :potable_water:
