ELECTRICAL BASICS
This is the name for the continuous flow of electric charge in a circuit.
electric current
A circle with a cross in it is which component?
Bulb
We need this source to be able to see objects.
light
These parts of our face detect light.
the eyes
In a fair test, this is the one thing you change
independent variable
These materials do not allow electricity to pass through them.
insulators
This device opens or closes a circuit.
switch
Light travels in this path.
straight lines
We see an object because light does this from the object into our eyes.
reflects
These diagrams use symbols to show how components are connected in a circuit.
circuit diagrams
The power source in a simple circuit is usually one of these.
battery (or cell)
A circuit must be this in order for current to flow.
complete
Materials that do not let light pass through are called this.
opaque
This part of the eye controls the amount of light entering.
pupil
When testing materials as electrical conductors, this must stay the same each time to keep the test fair.
circuit setup / power source
This happens to a bulb in a series circuit if one component is removed.
the bulb goes out / the circuit stops working
Adding more bulbs in series does this to their brightness.
makes them dimmer
When light bounces off a surface, it’s called this.
reflection
Shadows are formed when an object does this to light.
blocks light
When investigating shadows, this factor will make a shadow longer.
moving the light source further away (from the object)
This term describes the push that makes electricity move through a circuit.
voltage
This type of circuit allows components to work even if one branch fails.
parallel circuit
This term describes bending of light as it passes through materials like water or glass.
refraction
The image on the retina appears this way up.
upside down
In an electricity investigation, this graph type is best for showing how brightness changes as voltage increases.
line graph