Energy
What type of energy produced when we ring a bell?
Sound energy
Fill in the blanks.
Light travels in ________________ line.
Light travels in straight line.
What component provides electricity in a circuit?
cell / battery
When we watch TV, what energy lets us see the screen?
light
What is the hardest natural substance on Earth?
Diamond
A heater warms a room. What happens to the temperature of the room?
It increases or gets warmer.
Ops. Try again.
Next time.
What is the purpose of a switch in a circuit?
To control the electric current OR to open and close the circuit
What happens to light when it hits a mirror?
It reflects the light.
Which part of an elephant's body has the most muscles?
the trunk
What two forms of energy are produced when wood burns in a fireplace?
Light and heat energy
Why can we see a book under a lamp?
The book reflects light into our eyes.
Define a close circuit and an open circuit.
150pts each.
Close circuit - lamp turned on
Open circuit - lamp turned off
Name three components needed to make a simple circuit.
battery/cell, bulb, wires
In human anatomy, what does the “hallux” refer to?
big toe
Energy from her leg muscles / body is transferred to the bicycle causing it to move.
A torch shines through three cardboard holes in a straight line. Explain why we can't see the torch if we moved one card.
Light can only travel in straight line. Moving the cards, we are blocking the light.
Give two examples of electrical conductors and two examples of electrical insulators.
Conductors - metal
Insulators - non-metals
Define electrical conductors and electrical insulators. 200 pts each.
conductors - allows electricity to flow
insulators - doesn't allow electricity to flow.
When was the released of the first Iphone?
2007
Explain the energy transfer when a radio plays music.
Electrical energy is transferred into sound energy (and some heat) and to the surrounding environment.
Why can we see objects that do not produce light?
They reflect light from another source.
Draw a complete circuit with two lamps and two batteries.
Give two ways on how to make one lamp brighter.
add more batteries or remove a lamp
How many degrees are in a circle?
360
What is the world's most populated city?
Tokyo, Japan