Show:
Conduction
Convection
Radiation
100
Name a good and bad conductor
Metal/iron/gold/silver/aluminium/brass/wax/steel Plastic/rubber/glass/wood/hydrogen/oxygen
100
Describe the movement of particles in convection current.
Heated particles gain energy -> spread out -> less dense -> rise up. ->cool down -> lose energy ->condense ->sink and repeat
100
Why does drawing a curtain minimize heat in the room?
Curtain blocks out radiation from sun from entering room.
200
Why is conduction possible in metals?
Outer electrons of metal elements are free to move, allowing sea of electrons to transfer heat throughout the metal.
200
Which states of matter does convection take place in?
Liquid and gas
200

Where did radiation take place in the Heat Experiment? 

The heat lamp shines light and heat (radiation) on the materials. The radiation from the heat lamp travels through the air and warms the materials.

300
Why should you not touch a pot on a stove?
The heat transferred from the stove is quickly transferred throughout the pot through free elections transferring heat
300
You are walking in an underground maze. Why does it get colder as you walk further?
Underground is cold because hot air rises and cool air sinks. The further you walk, the further you are from a heat source, making it harder for warm air to travel the distance.
300
Heat radiation is what type of waves?
Electromagnetic waves
400
Why is it better for your hands to use a wooden rather than metal stick to roast marshmallows over a fire?
Metal conducts heat throughout much faster than wood does, so it isn't as hot to hold on to. otherwise your hands get roasted with the marshmallows
400
TRUE OR FALSE Potatoes are good at convection. Explain why
false haha. Although the potato contains lots of water, that water is trapped in cells and cannot undergo convection.
400
How does a vacuum (thermos) flask prevent heat from escaping?
Reflective surface prevents heat to be absorbed. Vacuum in flask will not allow conduction and convection to take place
500
Why does inserting a metal skewer through the potato help it to cook quickly?
The skewer is an excellent conductor of heat (a metal with mobile electrons) and carries it quickly into the center of the potato from outside.
500
Your room is particularly cold at night, and you try to make life less miserable. Your room has a high ceiling. You install a ceiling fan to push the air downward from the ceiling. Why does the fan make the air warmer near the floor?
Warm air rises on cool air, so that the air near the ceiling is naturally warmer than the air near the floor. By blowing that warm air back down toward the floor, the fan keeps you warmer.
500

Why did the black sand heat up more than off-white sand in the Heat Experiment? 

Black absorbs more of the radiation than the off-white sand and the off-white sand reflects more of the radiation.