Heat Transfer
Sound
Light
Reflection & Refraction
Electricity
Decay and Half Life
Acids and Bases
100
What type of heat transfer occurs through electromagnetic waves?
Radiation
100
What does frequency refer to?
Number of waves per second
100
What type of wave is light?
Transverse
100
A material that allows electrons to flow well is called a ______.
Conductor.
100
Calculate the gamma decay equation for:
Lead (Pb) - 207
Pb 207 + y
100
What ion do acids produce in water?
Hydrogen ions (H⁺).
200
What heat transfer occurs through the movement of currents in liquids and gases?
Convection
200
Describe how sound speed differs in solids, liquids, and gases.
Fastest in solids, slower in liquids, slowest in gases due to particle spacing.
200
Why can light travel through the vacuum of space?
Light has both wave light and particle properties and doesn't need a medium travel.
200
State the law of reflection
Angle of incidence = the angle of reflection
200
Difference between series and parallel circuits?
Series = one path
Parallel = multiple paths.
200
Calculate the beta decay equation for:
Bromine (Br) - 79
Krypton 80 + e
200
Acid + metal → ______ + ______
Acid + base → ______ + ______
Acid + carbonate → ______ + ______
Salt + hydrogen gas.
Salt + Water
Salt + Water + Carbon dioxide
300
What type of heat transfer occurs through direct contact?
Conduction
300
Why can’t sound travel through space?
Vacuum = No particles = no medium to vibrate
300
Why does a red object look red?
It reflects red light and absorbs other colours.
300
Define refraction
Bending of light when changing mediums
300
Why do lights stay on in a parallel circuit even if one bulb breaks?
Other branches still complete a circuit.
300
Calculate the Alpha decay equation for Neptunium (Np) -237
Pa 233 + He
300
When iron is exposed to water and oxygen it begins to rust. Write the word equation for this.
Iron + water + Oxygen -> Iron + Rust
400
Explain the difference between Exothermic and Endothermic reactions
Exothermic -> Releases heat energy (hot)
Endothermic -> Absorbs heat energy (cold)
400
Particles that vibrate back and forth in the same direction as the wave is what type of wave?
Longitudinal Sound Waves
400
What happens when light enters water from air?
It slows down and bends toward the normal
400
What happens when light enters glass and exits out the other side from air.
When would it bend towards the normal and when would it bend away.
It slows down as it enters and bends toward the normal, as it exits it speed up again so bends back away from the normal
400
There is a battery output of 12 volts.
In a parallel series, there is one series with 3 globes and one with 2.
How many volts does each globe receive in both series and explain if this would affect the brightness of the globes.
First series: each globes receives 4volts
Second series: each globe receives 6
In the second series, the globes will receive more volts so they will be brighter than the first series.
400
State the half life of the substance in the graph.
10 years
400
Box Jellyfish venom cause strong burns as a base. Use your knowledge of acids and bases to how you would treat this?
Use an acid to neutralise the base venom.