Types of Energy
What is potential energy?
Energy that an object has because of its position or its condition
You are holding an ice cube in your hand and it begins to melt. What type of heat transfer is described?
conduction
You are cooking soup in a pan, and you notice the spoon you are using is getting hot. What term explains why the spoon in getting hot?
convection
What is 'chemical energy'?
Energy that can be released by a chemical reaction
A material that does not let heat or electricity move through it easily
insulator
Which answer choice shows potential energy? A) an apple hanging from a tree branch B)a parked car C) a rocket on its way to space D) a spinning top
A) An apple hanging from a tree branch
If a ball is sitting in front of a compressed spring, what type of energy will increase for the ball?
potential energy
Pots are usually made of steel, copper, and aluminum. Why are pots usually made of these materials?
They are excellent conductors of heat
Name something that uses electricity as a source of energy?
TV, Computer, Oven, Microwave...
A light bulb changes electrical energy into two other forms of energy. What are they?
A light bulb changes electrical energy into light energy and heat energy.
Which type of energy is formed from vibrations that travel through air?
Sound Energy
You have a bowl full of hot water. You place a wooden spoon, metal spoon, plastic spoon, and rubber spoon in the water. Which object will warm up first?
The metal spoon
Which material would be the best to wrap around a very hot cup to help from getting burned? a)paper b)plastic c)aluminium foil d)foam
D) Foam
What type of material should you use to warm food up over a campfire?
Metal (aluminum)
Which item is the best conductor? a) an oven glove b) a pot c) a scarf d) a spoon
the Pot
What type of energy is a combination of kinetic energy and potential energy?
mechanical energy
How do kinetic and potential energy compare to one another?
Kinetic energy is the energy of motion, and potential energy is the amount of energy an object has based on in position.
You have two metal cups and two foam cups, and you place one of each type of cup on a metal plate and one of each type of cup on a foam plate. Which cup of water will lose heat the fastest?
Metal cup on a metal plate
If you wear wool socks with winter boots, how does the wool affect heat transfer?
Wool is an insulator that keeps your feet from losing heat.
Describe what radiation is?
The movement of heat without matter to carry it
When you throw a ball into the air, it stops for a split second at the top of its path. What type of energy does that ball have during that split second at the top of its path?
potential energy
Identify a heat source in your home. Then give an example of how this heat source transfers heat energy.
A gas stove is a heat source. The burners on the stove cause a fire, which can warm pans for cooking by conduction. This fire can also warm the air around the pan by convection.
A farmer is planning to build a barn. The walls of the barn can be either wood or metal. Which would most likely be the warmer in the winter and the cooler in the summer? Why?
A barn made of wood would most likely be warmer in the winter and cooler in the summer. Wood is a better insulator and metal is a better conductor. In the winter, heat from inside the barn would not flow out as easily through the wood. In the summer, heat from outside the barn would not flow in as easily through the wood.
You placed a thermometer in a glass of icy water. You noticed that the temperature slowly began to rise. Why did the temperature change?
Heat flowed from the air into the icy water and caused the temperature of the water to rise.
There are two desks next to each other. Desk A is lower than Desk B. Both desks have the same book on top of them. Identify which object has more potential energy. Explain Why.
Book B has more potential energy than Book A because of its position. Book B is higher of the ground, so if it were to fall, it would gain more kinetic energy.