Thermal and Kinetic Energy
What are the three ways thermal energy can be transferred?
Conduction, convection and radiation
Is sound a mechanical wave or an electromagnetic wave?
Mechanical
What is the highest point of a transverse wave called?
Peak or Crest
In which state of matter does sound travel fastest: solids, liquids or gases?
Solids
Which planet is closest to the Sun?
Mercury
Which type of heat transfer mainly occurs in solids?
Conduction
Are X-rays mechanical or electromagnetic waves?
Electromagnetic wave
What wave property measures the maximum displacement from the resting position?
Amplitude
What happens to the loudness of a sound when its amplitude increases?
It becomes louder.
Which gas do plants absorb from the atmosphere for photosynthesis?
Carbon Dioxide
Which type of heat transfer occurs through moving liquids and gases?
Convection
Which type of wave can travel through a vacuum: mechanical or electromagnetic?
Electromagnetic wave
What is the distance between two consecutive crests called?
Wavelength
What happens to the brightness of light when its amplitude increases?
It becomes brighter
What is the hardest natural substance found on Earth?
Diamond
How does thermal energy travel from the Sun to Earth?
Radiation
In which direction do particles vibrate in a transverse wave compared with the direction of energy transfer?
The particles vibrate perpendicular to the direction of energy transfer.
A source produces 12 complete waves in 3 seconds. What is its frequency?
4 Hz
Which colour of visible light has the longest wavelength?
Red
What is the opposite of a conductor of electricity?
An insulator
Two identical cups contain the same amount of water. One is at 20°C and the other is at 80°C. Which cup has greater kinetic energy?
The 80°C water has greater average particle kinetic energy
Sort these waves into mechanical and electromagnetic waves: sound, water waves, visible light and infrared radiation.
Mechanical: sound and water waves. Electromagnetic: visible light and infrared radiation.
Wave A has a higher frequency than Wave B; they travel through the same material. How do Wave A’s wavelength and pitch compare with Wave B?
Wave A has a shorter wavelength and a higher pitch.
When a sound wave travels across a room, do the air particles travel from the speaker to the listener? How do they move?
No. The particles vibrate back and forth around their resting positions while energy moves through the air.
Which animal did Australia go to “war” with in 1932?