Wave Energy
What is the highest point on a transverse wave?
The Peak
Identify which colour of visible light has the shortest wavelength.
Violet
Identify the three methods of heat transfer.
The three methods are: conduction, convection, and radiation.
Identify one wave type that doesn’t require a medium.
Light waves (electromagnetic waves) do not require a medium and can travel through the vacuum of space.
Which tennis player has won the most French Open tennis titles in history?
Rafael Nadal
Define Frequency in waves
Frequency is the number of complete waves that pass a point in a set amount of time, measured in hertz (Hz).
Define refraction.
Refraction is the bending of light as it passes from one medium to another with a different density.
Define thermal energy.
Thermal energy is the total kinetic energy of the particles in a substance due to their motion.
Define the electromagnetic spectrum.
The electromagnetic spectrum is the full range of electromagnetic waves arranged by wavelength or frequency, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
What is the name of the country which is completely surrounded by South Africa?
Lesotho
Describe how longitudinal waves differ from transverse waves
Longitudinal waves have particles that vibrate parallel to the direction of the wave, while transverse waves have particles vibrating perpendicular to the direction of wave motion.
Describe what happens to light as it enters a denser medium.
When entering a denser medium, light slows down and bends towards the normal.
Describe how convection works in a pot of boiling water.
In boiling water, convection currents form as warmer water rises and cooler water sinks, creating a circular flow of heat.
Describe how a wave’s amplitude affects the energy it carries.
Amplitude is the wave’s maximum displacement from rest. Greater amplitude means the wave carries more energy.
Which is the only country in the world whose flag is not a rectangle or square.
Nepal
Explain how wave speed, frequency and wavelength are related.
Wave speed = frequency × wavelength. If the frequency increases and the wavelength stays the same, the wave speed increases. They are directly related.
Explain how ultraviolet and infrared light differ in their properties.
Infrared has longer wavelengths and lower energy than visible light; ultraviolet has shorter wavelengths and higher energy
Explain the difference between heat and temperature.
Heat is energy transferred between substances due to temperature difference, while temperature is the average kinetic energy of particles in a substance.
Explain how the particle model of matter supports conduction.
In the particle model, particles in solids are closely packed. When one particle is heated, it vibrates and transfers energy to neighbouring particles, explaining conduction.
Which British rock band released the album Dark Side of the Moon in 1973.
Pink Floyd
Evaluate how a model of light waves helps scientists understand how light behaves when it travels through different materials such as air, water, and glass.
The wave model of light helps scientists predict how light will refract, reflect, or absorb in different materials. For example, when light enters water or glass from air, the model explains why it slows down and bends.
Evaluate how knowledge of the Electromagnetic spectrum is applied in technologies like remote controls, sunscreen, and X-rays.
The EM spectrum is used in various ways: remote controls use infrared; sunscreens block UV rays to prevent skin damage; X-rays penetrate the body for imaging. Understanding the spectrum allows safe and effective technology use.
Evaluate which heat transfer method would be most effective in a survival blanket and why.
A survival blanket reflects radiant heat back to the body (radiation) and reduces conduction and convection by acting as an insulator, making radiation the most effective method here.
Apply your knowledge: A student places a metal spoon in a cup of hot chocolate. Predict and explain what will happen to the spoon and why.
The metal spoon will become hot quickly because metal conducts heat from the hot chocolate to the handle. This happens due to conduction.
Which international agreement, signed in 2015, aimed to limit global warming by reducing carbon emissions, with nearly every country in the world participating.
the Paris Climate Agreement