Uses of Energy
Light Phenomena and the Laws of Light
Electricity and the Electrical Current
Effects of the Electrical Current
Electric Circuit and Inventions
100
True or False (correct if false): Using non-renewable energy sources can cause some serious environmental problems.
True
100
Define transparent, translucent, and opaque.
Transparent: an object that doesn't block light
Translucent: objects that block some light, some light passes through
Opaque: objects that block all light
100
What is electricity?
When electrons move from one atom to another.
100
Define the Heat Effect and provide an example.
When the electrical current passes through a conducting material and it heats up. Iron, radiator, heater.
100
True or False (correct if false): An electric circuit is an open circuit.
False. An electric circuit is a CLOSED circuit.
200
What are the 3 R's?
Reduce, Reuse, Recycle
200
Finish the sentence: reflections occur when....
.....light energy bounces off a surface and changes directions.
200
True or false (correct if false): the nucleus of an atom is made up of protons and neurons.
True
200
Define sound effect. Provide an example.
When an electrical current is transformed into a sound in a speaker. Stereo or computer.
200
What happens if an electric circuit is broken?
Electricity stops flowing.
300
How do the 3 Rs help the environment?
They help us use fewer resources.
300
What is refraction?
When light passes through a transparent substance, like water, the light energy changes directions slightly.
300
What is static electricity?
The movement of electrons between two materials. Electrons move easily between them when we rub them together.
300
Define Magnetic effect.
When an electrical current passes through a metallic substance it attracts other metal objects.
300
What is a phonograph? Who invented it?
A machine that records sound. Thomas Edison.
400
Why is nuclear waste radioactive? How is it harmful?
It emits radiation that can cause serious disease to living beings.
400
What is white light?
What light is made up of all the colors combined together.
400
What is an electrical conductor? Provide an example.
Matter that conducts electricity because electrical charges flow easily through them.
Metal
400
Define mechanical effect. Provide an example.
In electric motors the electrical current is used to produce a rotary movement. Fans, drills, reamers.
400
What kind of circuit is this?
A Parallel Circuit.
500
What chemicals combine to create acid rain?
Nitrogen oxide and sulphur dioxide.
500
True or false (correct if false): Black objects reflect the light of all colors.
False: WHITE objects reflect the light of all colors. Black objects absorb all the light and don't reflect ANYTHING
500
What is an electrical insulator? Provide an example.
Matter that doesn't conduct electricity because electrical charges can't move.
Wood, plastic, rubber, glass
500
Define chemical effect. Provide an example.
The electrical current causes chemical changes in substances. Batteries.
500
What is the name of the machine that became the first motion picture camera? Who invented it?
Kinetoscope. Thomas Edison