Heat Transfer
Energy Conversion
More Principles
Materials
Constraints
100
This type of heat transfer requires direct physical contact.
What is "conduction"?
100
The energy conversion from light to heat is known as this seven letter word.
What is "thermal"?
100
This is defined as the use of materials to slow heat down so that it will not escape.
What is "insulation"?
100
We use aluminum foil for our solar ovens to redirect sunlight onto the food, also known as this word that also starts with "r."
What is reflection?
100
DESCRIBE: Describe how the weather may affect the performance of a solar oven.
...The sunnier, the better! Wind might knock it over, rain might get it wet, clouds would block the sun, etc.
200
In this type of heat transfer, heat travels through electromagnetic waves.
What is "radiation"?
200
Photovoltaic energy conversion transforms light energy into this form of energy.
What is "electricity"?
200
When we use a smooth surface to reflect light, it bounces one way, which is known as this.
What is "specular reflection"?
200
FILL IN THE BLANK: Black paper absorbs (more/less) light compared to white paper, so it's important that we line the inside of our solar ovens with it.
more
200
DESCRIBE: Describe how the materials you have access to may affect the performance of your solar oven.
...More advanced technology/materials will make a better solar oven, of course. If you run out of materials, your oven would be negatively affected.
300
This method of heat transfer can be described as the movement of heat through a fluid in a circular pattern.
What is "convection"?
300
Cooking food with a solar oven is an example of this type of energy conversion.
What is "thermal"?
300
If we use wrinkled foil, the light bouncing off of it will scatter, which is known as this type of reflection.
What is "diffuse"?
300
Using clear plastic wrap as a window allows the sun to hit the food while still doing this to the box, trapping the heat inside.
What is insulating?
300
DESCRIBE: Describe how location may affect the performance of a solar oven.
...If someone or something (clouds, tree, bench) is casting a shadow over the box, it will not get as hot.
400
This diagram shows the movement of heat in the Earth's atmosphere. We see that heat is moving in a pattern known as the ________ ________.
What is "convection current"?
400
These two adjectives that start with the letter "s" describe how our tin foil should be so that it can reflect light best.
What are "smooth" and "shiny"?
400
DESCRIBE: Describe how solar oven size affects its performance.
...The smaller the solar oven is, the less time it will take to heat up food, but it will not be able to get as hot as a larger one.
500
Lizzy went to the beach in Rhode Island this past week. When she arrived, she took off her sandals. Her feet got hot from the sand, which is an example of _______. Then, she dove in the water. She noticed that the surface of the water was warmer than it was deep down, which is caused by _______. Finally, she laid down on her towel and got all burnt, which was caused by _______.
What are "convection," "radiation," and "radiation"?
500
This two-word phrase sounds like something an avid gardener would know a lot about, but for our class--it describes how the heat from the sun stays in our solar ovens and cooks our food.
What is the "greenhouse effect"?
500
DESCRIBE: Describe a potential situation that would make a community start cooking with solar ovens (compared to traditional ovens that use electricity).
...One example might be lack of access to electricity. In some communities, natural disasters such as earthquakes and hurricanes cause a widespread loss of electricity. This might cause people to seek alternative forms of cooking, such as solar ovens.