Hot in herre.
Heat Waves
Some like it hot.
Hot Hot Hot
On Fire
100
Which type of heat transfer happens when you burn your hand on the stove?
What is conduction?
100
Movement of thermal energy from a warmer object to a cooler object.
What is Heat
100
The average kinetic energy of the particles that make up a material.
What is temperature
100
Material through which thermal energy flows easily.
What are conductors
100
Which type of heat transfer happens when you get a sunburn during a baseball game?
Radiation
200
A friend tells you that insulation keeps out the cold. Explain why this statement is incorrect.
Heat is transferred from hot to cold. So insulation actually keeps the warm in, not the cold out.
200
What state(s) of matter are fluids?
What are liquids and gasses?
200
How did your thermos prevent heat loss through conduction?
Insulating materials! They slow down heat transfer through direct contact.
200
Radiation is...
heat transfer through electromagnetic waves
200
Why does your hand feel cold when you holding an ice cube?
What is your hand is losing thermal energy heat because it is transferring into the ice cube
300
You are supposed to get low toward the floor if you are ever caught in a building or house fire. The hotter air and smoke will rise and the cooler air will sink. What type of heat transfer does this represent?
What is Convection?
300
True or False. Heat and thermal energy are the same thing.
False
300
What are two examples of controlled variables for your thermos project?
Water volume, starting temp, time, etc.
300
Objects that do not make good conductors may be good?
Insulators
300
How did your thermos prevent heat loss through convection?
Lids! They prevent the warm air from escaping and cooler air from entering.
400
The Three ways thermal energy is transferred are...
What is Radiation, Conduction, Convection
400
Heat flows from
warmer to cooler temperature
400
Heat rising and cooling to form currents in a fluid
What is convection?
400
Fill in the blanks
a) Radiation
b) Convection
c) Conduction
400
What is the independent and dependent variable for building your thermos?
Independent: Thermos design
Dependent: Temperature change
500
Heat moves in one direction. How did your thermos prove that?
The temperature of the water decreased over time, showing heat moved from the hot water to the cooler environment.
500
Transfer of thermal energy between materials by direct collision of particles.
What is Conduction
500
Which has the lowest specific heat: plastic, wood, or metal?
Metal
500
Why do homes in warm climates often have white roofs?
Prevent radiation by reflecting light/heat off the house
500
If two objects are at the same temperature but have different masses, will they contain the same amount of thermal energy?
NO!
600
True or false. Does hot cocoa heat the surrounding air?
True
600
What has more thermal energy:
- A 100L pot of boiling water
- A 50L pot of boiling water
A 100L pot of boiling water (more mass= more energy!)
600
Explain why convection currents happen.
Air rises when heated because it becomes less dense. Cooler air sinks because it is more dense, creating a cycle.
600
what is the metric unit for temperature
What is celsius
600
Throughout the time you tested, what happened to the water molecules in your thermos. Where did the energy go?
The molecules lost energy and moved slower as the water cooled. The energy transferred into the surrounding air and thermos walls.