Heat
This is the SI unit used to measure energy of heat.
Joules.
What happens to volume when amplitude increases?
Volume increases ( sound becomes louder).
What does prism do?
A prism separates white light into its component colors(rainbow).
What is electricity?
Electricity is the flow of electrons through a conductor.
A magnet made by passing electricity through a wire.
What is an electromagnet?
Heat cannot travel through space.Is this statement true or false? Explain.
False. Although space is a vacuum, heat can move by radiation.
Why can sound not travel in space?
Because sound needs a medium to travel,and space is vacuum.
Why does a pencil look bent in water?
Due to refraction - light bends when passing through water.
What is the difference between an open and closed circuit?
Open circuit- path is broken , no current flows.
Closed circuit- complete path,current flows.
Where is the magnetic force strongest in a magnet?
At the poles
This is the transfer of heat through the movement of liquids or gases.
Convection
Give one example where both sound and light are used together.
Fireworks- Produce bright light and loud sound.
Why does a mirror reflect light but not let it pass through?
A mirror is opaque, so it reflects light instead of transmitting it.
Why are metals good conductors of electricity?
Because electrons can move freely in metals.
The area around a magnet where its force can be felt.
What is a magnetic field?
Heat moves through a solid object like a frying pan in this process.
Conduction
When a sound has a great deal of energy,it also has a
high _______.
amplitude.
Why do we see lightning before we hear thunder?
Light travels much faster than sound.
Why are homes wired in parallel and not in series?
So each device works independently and keeps working if one fails.
What is the difference between alternating current (AC) and direct current(DC)?
AC- Current changes direction.
DC- Current flows in one direction.
The main unit of temperature used in the USA.
What is degrees Fahrenheit?
Which of these animals make a high-pitched sound:
elephant,dog or mosquito?
Mosquito
A mosquito is very small,so its wings vibrate very fast, creating a high frequency,which we hear as a high-pitched sound.
True or False
Images are sent to our brain right-side up. (correct vertical orientation)
False.
The lens actually sends an upside-down image to the retina. Your brain flips it so you see the world correctly.
What is the role of a fuse or circuit breaker?
It stops the flow of electricity when current becomes too high, preventing damage.
What does a transformer do?
A transformer changes the voltage of electric current.