Materials that transfer heat energy easily are called what?
Conductors
100
What does expansion mean?
to get bigger/more spread out
100
Name the energy transfer: A plugged in lamp produces light.
Electrical --> electromagnetic
100
What light behavior makes it difficult to locate something in the water?
Refraction
100
What is thermal energy?
Energy that relates to heat or a change in temperature
200
Which of the following would be a good insulator: copper, aluminum, wood, steel?
Wood
200
When matter gets colder, does it expand or contract?
contract
200
Name the energy transfer: Feet rubbing on the carpet then shocking someone.
Mechanical --> Thermal
200
What part of the Electromagnetic Spectrum has the greatest amount of energy?
Gamma rays
200
What is radiation?
When thermal energy is transfered across distances by electromagnetic waves
300
Is a wire considered to be a conductor or an insulator?
Conductor
300
How are the atoms moving (faster or slower) when an object contracts?
Slower
300
Name the energy transfer: Two sticks run together to create heat.
Mechanical --> Thermal
300
If two objects are dropped in oil. Object A floats and Object B sinks. Which one is less dense than the water?
Object A
300
Which type of thermal energy transfer causes pasta cooking on a stove to move in circles from the bottom of the pot to the top and back?
Convection
400
John is boiling a pot of water on the stove. Which part of the pot is made of material that does NOT transfer heat easily?
The handle
400
Using what you know about expansion and contraction, explain why bridges in places that get very hot AND very cold have joints that are flexible and allow the bridge to move a little bit.
Joints that can move a little bit allow the bridge to safely/easily move when the parts contract apart in the cold and expand together in the warmth.
400
Name the energy transfer: the sun shines on a building, raising the temperature inside.
Electromagnetic --> thermal
400
Which light behavior makes it better to wear a white shirt than a black shirt on a hot day?
Reflection
400
The sun warms the sidewalk which then burns my bare feet. What two kinds of thermal energy transfer are happening and in what order
Radiation when the sun warms the sidewalk and conduction when it burns my feet
500
You are told that your bedroom is on fire, but you want to check for yourself in a safe way. Which part of the door (the handle or the door itself) would you touch to see if heat was coming from the other side? Why?
The handle, because it is made of metal and therefore it will conduct heat easily.
500
I'm trying to put a metal bar through a hole and get it stuck there, but the bar is too big for the hole. Explain how I could fit the bar into the hole using what you know about expansion and contraction.
You should cool the bar down so that it contracts, then place it through the hole and warm it back up so it expands and gets stuck.
500
Name the energy transfer: A solar panel gathers energy that turns a wheel that creates power for a town.
Electromagnetic --> mechanical --> electrical
500
Put the electromagnetic spectrum in order from shortest to longest wavelength.