Heat Transfer
What type of heat transfer occurs when heat moves through direct contact?
Conduction
What type of energy is the energy of motion?
Kinetic Energy
What is it called when energy changes from one form to another?
Energy transformation
What type of energy is stored in food?
Chemical Energy
What is the Energy Transformation occuring in a lamp?
Electrical -----> light and heat(thermal)
What type of heat transfer occurs in liquids and gases in a circular motion? (hot rises, cool sinks)
Convection
What type of energy is stored energy?
Potential Energy
What type of energy transformation occurs in a flashlight?
Chemical → electrical → light
What type of energy is associated with moving objects?
Kinetic Energy
Plastic, glass, and water are examples of what?
Insulators
Which type of heat transfer does NOT require a medium to travel?
Radiation
What happens to kinetic energy when speed increases?
it increases
In a toaster, what energy transformation occurs?
Electrical → thermal (heat)
What type of energy is stored in objects due to position?
Gravitational potential energy
The ability to do work is _________
Energy
Why does hot air rise and cold air sink in convection currents?
Because hot air is less dense and cold air is more dense
A roller coaster is at the top of a hill. What type of energy is greatest at that point?
Potential Energy
Why is some energy “lost” during transformations?
It is converted into thermal energy
What type of energy is stored in a stretched rubber band or compressed spring?
Elastic Energy
The Law of Conservation of Energy states what?
Energy cannot be created or destroyed only transformed.
A metal spoon is left in a hot cup of soup and becomes warm. Explain what type of heat transfer is occurring AND why the spoon heats up.
Conduction; heat transfers through direct contact from the hot soup to the spoon particles
As a roller coaster goes down a hill, describe how potential and kinetic energy change.
Potential energy decreases while kinetic energy increases
A student plugs in a fan. Describe the FULL sequence of energy transformations that occur from the outlet to the movement of air.
Electrical → mechanical (fan blades moving) → kinetic (moving air)
A stretched rubber band is released and snaps back to its original shape. Identify the types of energy involved BEFORE and AFTER it is released, and explain how the energy changes.
Elastic potential energy is stored in the stretched rubber band.
After: The energy is converted into kinetic energy as it snaps back
A solar panel is used to power a light bulb. Describe the sequence of energy transformations that occur from sunlight to the light produced.
Radiant (light) energy from the sun is converted into electrical energy by the solar panel, which is then converted into light energy (and thermal energy) by the bulb.