Conduction, Convection, Radiation
Why does a metal spoon get hotter than a plastic spoon in the same cup of soup?
A metal spoon gets hotter because metal conducts heat better than plastic — it transfers energy more efficiently.
Describe the Law of Conservation of Energy.
energy cannot be created or destroyed, only changed from one form to another.
What happens to the red wave on an object that looks red
it is reflected
The whole range of EM waves in order of increasing frequency and decreasing wavelength.
What two points define the wavelength of a transverse wave?
Crest to Crest or Trough to Trough
What happens to the speed of particles in a substance when its temperature increases?
particles move faster and their kinetic energy increases.
What is energy transfer?
Energy going from one media to another
What happens to light when it hits a mirror?
When light hits a mirror, it reflects — it bounces back at the same angle it came in.
What type of wave has the highest frequency on the electromagnetic spectrum?
The gamma ray has the highest frequency on the electromagnetic spectrum.
What kind of wave can travel through space?
An electromagnetic wave (like light) can travel through space because it does not need a medium.
How is the temperature of objects affected by heat flow?
Heat always flows from a warmer object to a cooler object
What is energy transformation
When one type of energy changes to another type of energy
Why does a straw look different in water than in air
Refraction bends the wave when it travels into different material
What is the smallest portion of the electromagnetic spectrum
visible light
What type of wave is sound?
Sound is a mechanical, longitudinal wave — it travels by vibrations moving through a medium (like air or water).
Describe how energy is transformed when you turn on a flashlight.
In a flashlight, chemical energy in the batteries → electrical energy → light energy (and some heat).
What is the difference between kinetic energy and potential energy?
Kinetic energy = energy of motion.
Potential energy = stored energy
What is the window an example of
Transmission
Which wave has the longest wavelength
Radio Waves
Why does sound travel faster in solids than in air?
Because the particles in solids are closer together, allowing vibrations to pass more quickly.
Where does convection occur
fluids (liquids and gasses)
How does heat transfer stop when two objects reach the same temperature?
when both objects reach the same temperature; thermal equilibrium is reached
What happens to the green wave on an object that looks red
It is absorbed
What is the relationship between wavelength and frequency?
When one increases, the other decreases
What is the main difference mechanical and electromagnetic waves.
Mechanical waves need a medium and Electromagnetic do not need a medium