Heat Transfer
What are the three types of heat transfer?
Conduction, convection, and radiation
What color material should the inside of a solar cooker be to absorb heat well?
Black
What happens when light hits a mirror?
It reflects
What is something you change in an experiment to test a hypothesis?
A variable
You are stuck without electricity...what free energy source can you count on during the day?
The sun or solar energy
Which type of heat transfer happens when you touch a hot pan?
Conduction
What material helps trap heat inside a solar cooker?
Plastic Wrap
What type of surface reflects light best?
A smooth, shiny surface.
What is Solar Energy?
Energy that comes from the sun.
What are all of the colors of the rainbow in order?
red, orange, yellow, green, blue, purple, pink
Why does warm air rise in a room?
Convection
Why would you use aluminum foil in your solar cooker?
To reflect sunlight into the cooking area and focus the heat.
Why does a black object get hotter in the Sun than a white one?
Because black absorbs all colors of light while white reflects them.
What do we call something that slows down heat?
An insulator
If you’re studying the Sun, are you an astronomer, a chef, or a zookeeper?
An astronomer!
How does the Sun heat the Earth through space?
Radiation
Why might adding insulation around a solar cooker help it work better?
Because insulation slows down heat loss, keeping the heat inside the cooker longer.
How does a solar cooker use reflection to increase heat?
It reflects sunlight from shiny surfaces into the cooking area to concentrate the light and heat.
What is absorption?
When light or heat is taken in by a surface.
I burn with no wood, I rise with no feet,
I shine without eyes, and I never sleep.
I’m not alive, but I give life to all.
What am I?
The sun
In a solar cooker, how do all three types of heat transfer help cook the food?
Radiation brings heat from the Sun, conduction transfers heat through the materials, and convection circulates warm air inside the cooker.
Why is it important to reduce air flow inside a solar cooker?
To prevent heat loss and improve insulation for better cooking efficiency.
How does the color of an object affect how much light it absorbs or reflects?
Dark colors absorb more light and heat, while light colors reflect more and absorb less.
This is the term for a factor in an experiment that is changed to test its effect on the outcome.
Independent Variable
ITS THE APOCALYPSE! What do you make in order to cook food?
A solar cooker!