Types of Energy
Which two types of energy travel in waves?
Radiant (light) and Sound (and sometimes thermal)
Molecules spread apart and become less dense when they gain heat energy. This causes them to move in which direction?
Is wood an insulator or a conductor?
Insulator
Momma bear, Poppa bear and Baby Bear are standing on a tall brick wall. Assuming the bears' sizes are consistent with the fairytale, who has the greater amount of gravitational potential energy?
Poppa Bear
What is the difference between potential and kinetic energy?
Potential energy is the energy an object could have based on its position, chemical composition or condition
Kinetic Energy is the energy associated with an object's motion
Which form of energy is responsible for causing you to fall if you trip on the playground?
Gravitational Potential Energy
Which method of heat transfer do we rely on to warm our house in the winter time?
Convection, Conduction, or Radiation?
Convection. Convection is the movement of heat through a liquid or gas (the air in out house)
Which state of matter makes the best heat conductor?
Solids
Both energy and matter cannot be ____________ or ____________.
Created or Destroyed
The ability to do work is called...
Energy
Sound is the ____________ of particles through a medium
Vibration
During the popcorn lab, we used 3 methods to cook popcorn. Which method represents each type of heat transfer?
Air Popper, Oil Popper, Microwave
Air Popper- Convection
Oil Popper- Conduction
Microwave- Radiation
What material would you choose to design a shelter for stray animals in the winter?
Some kind of insulator.
Blankets, fabrics, wood crate, plastic tote etc.
In the washer lab, the string with three washers heated the water more than the string with the single washer. Why is this?
The string with 3 washers had a greater mass
What kind of energy does a trampoline or a slingshot have?
Elastic Potential Energy
Which two methods are responsible for releasing nuclear energy?
Fission and Fusion
Conduction requires particles to be _____________ in order to be an efficient heating method.
Touching (or close together)
Why is fiberglass insulation so important when building a home?
It keeps unwanted heat out in the summer and purposeful heat in in the winter
A lake and an iceberg have the same mass. Which has greater thermal energy and why?
Why is absolute zero a physical impossibility?
Because particles will always have some amount of energy within them.
Which two types of energy rely on the flow of electrons between molecules?
Electrical and Thermal
Sound can't travel through space, but we can enjoy the light and heat from the sun. Why is this?
Light and Thermal Radiation do not require a medium to travel through and therefore can move through the vacuum of space.
Conductors are comprised of materials that...
Share electrons easily
Why does the mass of an object affect the amount of energy an object has?
More mass means more particles in an object's composition, and more particles means more energy can be stored and released by that object.
What happens to the energy in a closed system?
It will be recycled and reused forever