Science Flashcards
What is energy?
Energy is things that allow us to move around.
What do we need energy for?
We need it to move and to get electriity.
Where does energy come from?
The sun
What is a fossil fuel?
A fossil fuel is a fuel found deep underground- mined to get.
How is it formed?
(Fossil fuels)
Fossil fuels are formed when the remains of organisms were buried deep in the Earth for millions of years ago, over a long time heat and pressure converted the remains of the organisms into fossil fuels.
What is input energy?
The energy we need to put in to start a fuel burning.
What is output energy?
The energy that is produced when a fuel burns.
What are examples of fossil fuels?
Fossil fuels include:
petroleum (oil) ; coal ; natural gases.
How is coal formed?
( ____ + _____ = coal )
Animal material + presure / heat = coal.
How is Oil formed?
( ____ + _____ = oil )
Plant material+Pressure / heat = oil
How is natural gas formed?
( ____ + _____ = natural gas)
Animal Material + more pressure/heat = natural gas
What does light energy do help us with/do and what is an example of it?
Makes things visible, a torch.
What does kinetic energy help with/do and what is an example of it?
Makes things move, running
What does thermal energy help with/do and what is an example?
Comes from heat, boiling the kettle
What does sound energy help with/do and what is an example?
Formed by vibrating sound waves, music
What does nuclear energy help with/do and what is an example?
Energy released during a nuclear reaction when an atom is split / fused, the sun.
What does chemical energy help with/do and what is an example?
Stored energy that is released during a chemical reation, batteries.
What does electrical energy help with/do and what is an example?
Energy consumed in the form of eletricity-comes from electrons, electricity.
What does potential energy help with/do and what is an example?
Energy stored in an object, pogo stick.
What are the 3 things on a fire triangle and where are they placed?
Fuel-bottom; oxygen-left; heat-right.
A flame will only burn if it has 3 things, what are those things and why is it needed?
- Fuel-something to burn
- oxygen-found in the air
- Imput energy-something to start the burning.
What are the actions to take during a fire, name three?
( you may name all six if wanted )
- Stay calm
- stay low to avoid smake
- go to nearest exit
- crawl if neccessary
- call 10111
- check if door is hot before opening it
Cells and Batteries:
Where can energy also be stored in and what does that make things do?
Cells and batteries makes things operate
Cells and Batteries:
Batteries come in many different ___ and ___.
Shapes ; Sizes
Cells and Batteries:
Battery used for portable electrical devices
Dry cells
Cells and Batteries:
For a cell to work what is converted, where and into what?
Chemicals inside a cell are converted into electrical energy / eletricity
Cells and Batteries:
A battery is usually a collection of what connected where to where?
Collection of cells connect end to end
Cells and Batteries:
Or a battery could just be …
other than a collection of cells
Just one cell
Cells and Batteries:
What does a battery consist of?
An outer case and a carbon rod in the centre of cell
Cells and Batteries:
Give a conductors of electricity?
(inside a cell)
Carbon rod
Cells and Batteries:
How many cells does a car have?
6 large cells
Cells and Batteries:
What are the names of both ends of cells/batteries?
Positive and negative
Cells and Batteries:
What are conductors of electricity?
A material that allows electrical curents to pass through them easily.
Cells and Batteries:
What do conductors of electricity link and to create what?
Used to link the positive and negative ends creating a circuit
Cells and Batteries:
What is a circuit?
A complete path around which electricity can flow
Cells and Batteries:
Do switches work when they are open or closed?
Closed
Cells and Batteries:
How do switches work when closed?
Electricity can flow around the circuit and it lights up the light bulb
LIght bulb / any source being powered by this electricity
Cells and Batteries:
How do switches work when open?
There is a break in the circuit and the light bulb won’t glow
Light bulb / source trying to be powered by the electricity
Cells and Batteries:
Flowing energy
What is it measured in
amperes (amps.)
Cells and Batteries:
Electrical energy stored in battery
(potential energy) Measured in what?
Volts (v.)
Mains electricity:
Where does the electricity for our homes/buildings come from?
Huge power stations
Mains electricity:
From there where is it transferred in and then back where?
From there = Power station
Transferred in circuit to homes then back to station
Mains electricity:
From power station what happens
(step 1) (how electricity gets to us)
Large amount of electricity travel to substations through transmission lines held by pylons
Mains electricity:
From substation what happens
(step 2) (how electricity gets to us)
Smaller amount of electricity are transferred through distribution lines to electricity boxes
Mains electricity:
What is the last step
(step 3) (How electricity gets to us)
Wires connected from the electrical box connect to lights/plug points
Mains electricity:
Where do stations mostly get energy from
Burning coal (fossil fuel)
Mains electricity:
4 other types:
(Where stations get energy from)
- Water - hydro-electric power
- nuclear energy /power
- geo-thermal - steam power
- wind - wind turbines
How electricity gets to us:
coal fired power
What is it? -step one
Place where electricity is generated
How electricity gets to us:
Step up transformer
What is it? - step two
Increases power to send electrical current over a long distance to homes
How electricity gets to us:
Cables
What is it?
Thick wires that take electricity over long distances
How electricity gets to us:
Pylons
What is it?
Tall metal structures to support cables
How electricity gets to us:
Step down transformer
What is it? -step three
Decreases power to use in homes
How electricity gets to us:
Wooden poles
What is it?
Structures holding wires that carry electricity to homes
Safety with electricity:
Do not use/touch broken plugs/damaged cords
Why not?
Plugs could spark and cause fire, you could get electricuted
What is an insulator
A substance or device which does not conduct electricity
Insulator-example
Give an example
Rubber shoes
The Earth:
Scientists who study space
Are called …
Astronomers
The Earth:
Where do they work
( the astronomers )
Special buildings - Observateries
The Earth:
What happens inside
(inside the observateries)
Workers observe the sky to find out more about the solar system
Workers/astronomers
The Earth:
What watches the sky from observateries
Other than the astronomers
Telescopes
The Earth:
What are telescopes
Powerful machines that make small objects look bigger
The Earth:
Where is the best place to study
( study the solor system )
Sutherlands
The Earth:
Why?
Why is it the best place to study the solar system?
No one lives there, very little rainfall and is the darkest place on Earth
The Earth:
Which galaxy is Earth in
The milky way
The Earth:
The Milky Way
What is it
A galaxy which is home to our solar system and at least 20 billion stars
The Earth:
Solar system
Is what ?
Our sun and everything around it
The Earth:
Solar System - shape
Elliptical shape
The Earth:
Each planet - own …
What does each planet have it’s own of
moons