Forms of Energy
What is energy?
The ability to cause motion or create change
What produces sound?
What is vibrating molecules (objects)
What is light energy?
The energy that travels in waves and can be seen
What is heat?
A form of energy that causes temperature changes
What is a conductor?
A material that conducts heat well.
What are the 5 forms of energy?
What is mechanical, electrical, light, thermal (heat), and sound
What does pitch depend on?
What is how fast or slow molecules move
Name a source of light energy
The sun or a Light Bulb
How does heat move?
Heat moves from hot objects to cold objects.
What is an example of a good conductor?
Copper or aluminum
What type of energy is produced by moving objects?
What is the energy of motion (Mechanical/Kinetic Energy)
What happens when you tighten the strings on a guitar?
What is the pitch get higher
What happens to light when it hits a mirror?
It reflects off of the mirror
What is conduction?
The transfer of heat through direct contact.
What is an insulator?
A material that does NOT conduct heat well
What can electrical energy be transformed into?
What is heat, light, and sound energy
What causes the volume of a sound to change?
What is the strength of the vibrations (stronger=louder, weaker=quieter)
How can light be used to create heat?
It can be absorbed by materials, which warms them up
What happens to a hot drink when it is placed in a cold room?
The drink gets colder because heat flows from the drink to the cold air.
What is an example of a good insulator?
Rubber or wood
What is the energy called that comes from the sun?
What is Solar energy - Light/Heat
What happens to sound in water compared to air?
What is sound travels faster in water than in air
What causes objects in water to seem bigger?
Light refracting, or bending
Why does metal feel colder than wood at the same temperature?
Metal conducts heat better than wood, drawing heat away from our skin
Why do we use insulators in electrical currents?
Insulators help prevent electrical currents from escaping and protect us from electric shocks