The document discusses different methods of heat transfer including conduction, convection, and radiation. It provides examples of conduction occurring when cooking eggs on a stovetop, with heat conducted from the burner through the pan and into the eggs. Convection is defined as heat transfer through the movement of a fluid like air, as seen in an air fryer which circulates hot air around food. Radiation allows heat transfer without direct contact, such as feeling warmth from a campfire through radiated heat waves.

3. As you cook eggs in a frying pan, the heat
from the stove is transferred to the pan
through direct contact, which is conduction.
The metal of the frying pan is a good
conductor of heat, so it quickly absorbs the
heat energy and distributes it evenly across
the surface of the pan. This causes the
eggs to cook as they come into contact
with the heated surface of the pan.

4. An air fryer is like a mini oven that uses hot
air to cook food. It has a fan that circulates
the hot air around the food, which cooks it
from the outside first, then inside. This
process is called convection, which means
heat transfer through the movement of a
fluid like air. The hot air transfers heat to the
food's surface, cooking it and creating a
crispy outer layer.
Hot wind
circulates
the food

5. Radiation is a way that heat can move
without needing anything to physically
touch or transfer it. It happens when
energy travels through the air or even
empty space. The warmth you feel from
sitting around a campfire at night is from
the heat energy traveling through the air
to reach you.

6. Fan uses electrical
energy to move its
blades.
Creating movement
in the air.
Produces a cooling
effect.

7. Kinetic energy allows the
person to move and
perform physical activities.
Eating food transfers the
chemical energy into kinetic
energy.

8. Powers objects like the
remote for the robot.
Chemical energy
stored in a battery.
Transfers to
electrical energy.

9. When you turn on a lamp, electricity flows
from the power source to the bulb through
wires. The electricity heats up a wire inside
the bulb called a filament. The heat energy
is then transferred to the filament's surface,
where it becomes hot enough to emit visible
light. This light travels through space as
waves of energy and allows us to see.

10. When you listen to music on your phone or
other electronic device, electrical energy is
transferred into sound energy through the
speakers or headphones. The electrical
energy from the battery of the device is
converted into a current that passes through
the speakers or headphones, which in turn
create sound waves that you can hear.

11. When you cook food on a stove, the heat
is transferred from the stove to the pot
through conduction. The metal of the pot
is a good conductor of heat, so it quickly
absorbs the heat energy and distributes it
evenly across its surface. This causes the
food inside the pot to heat up and cook as
it comes into contact with the heated
surface of the pot.