Circuit
What is an inductor?
Material that does not let electricity pass through - rubber plastic
Why can't you see through a wooden door?
A wooden door is opaque and blocks light.
Put these in order from LOWEST pitch to HIGHEST pitch:
What is when light bounces off the surface of a material?
Reflection
What is the arrow flipped over or the oencil bent in water an example of?
Refraction
What is a conductor? Provide examples
Material that lets electricity pass through, foil, metal
List two examples of natural light and two examples of artificial light.
Natural: Sun, Fire
Artificial: flashlight, LED
What is a vibration? How are vibrations related to sound?
Vibrations are invisible waves that move up and down very quickly. Sounds are made through vibrations.
What is when light stops at an object and doesn’t reflect?
Absorption
Which device protects against hearing damage?
Earplugs
What is the difference between open and closed circuit?
A closed circuit has a complete path so electricity can flow. An open circuit has a break in the path so electricity cannot flow.
What is light?
Light is is a form of electromagnetic energy that our eyes can detect. It travels in a straight line.
What is sound?
Sound is created when something vibrates and sends waves of energy or vibration into our ears.
What is when light passes through an object and bends?
Refraction
Define transparent, translucent and opaque? Provide 1 example each.
Transparent materials allow light to pass through. Clear glass is transparent.
Translucent materials allow some of the light to pass through. Tissue paper and sunglasses are examples of translucent objects.
Opaque materials do not allow any light to pass through. Examples include wood.
You build a circuit with a battery, bulb, and foil. The bulb lights up. Then you cut the foil in half. What will happen and why?
The bulb will turn off because the circuit becomes open.
Why do mirrors appear shiny?
They reflect most of the light that hits them.
Which has a higher frequency: a bird chirp or thunder? Why?
A bird chirp
A bird chirp is a high-pitched sound. High-pitched sounds are made by fast vibrations, which means they have a high frequency.
What measures the number of sound vibrations per second?
Frequency
Describe the lemon battery experiment. Explain exactly why we used lemon, what was used conductor and inductor
electrolyte - citric acid
copper +
zinc -
Electricity must travel in what direction for the light bulb to light up?
it must travel in a complete loop for a bulb to light
A room has black curtains and white curtains. Which curtains will absorb more light?
Black curtains.
Explain the difference between pitch and loudness.
Answer: Pitch is how high or low a sound is. Loudness is how loud or quiet a sound is.
What is amplitude?
Amplitude is the distance from the top (peak) of the sound wave to the bottom (trough).
What is the speed of light?
300 000 kilometres per second