Solar Energy
What is solar energy?
Solar energy is energy we get from the Sun’s light and heat.
What does radiate mean?
To emit, or give off something
What are insulators?
Insulators are materials that are bad at conduction (like wood, plastic, or rubber).
____ liquids or gases ___ while ____ liquids and gases ___.
warm; rise; cool; sink
What is ozone depletion?
Ozone depletion means the ozone layer in the atmosphere is getting thinner, which lets more of the sun’s harmful ultraviolet (UV) rays reach Earth.
The Sun is made up of what 2 gases?
Hydrogen and Helium
What is radiation?
Radiation is the emission of energy from one source to another.
Most conductors are made up of...
Metal
What makes a hot air balloon rise?
Hot air balloons rise because warm air inside the balloon is created by an open flame.
What kind of radiation has a risk of causing sun damage and skin damage?
Ultraviolet radiation
Solar panels collect sunlight and turn it into what?
What is the type of radiation we see as sunlight?
Light radiation
What is conduction?
Conduction is how heat moves from one object to another by direct contact.
What does the rising and sinking of warm and cool fluids create?
Convection currents
What is the name of the gas that is ruining the ozone layer?
Methane
What does it mean when we say solar energy is renewable?
It won't run out.
What is the kind of radiation we feel as heat?
Infrared radiation
Heat flows from something ___ to something ___ when they touch.
hot, cool
What is convection?
Convection is the transfer of heat in liquids and gases (fluids) by the movement of the fluid itself.
List some examples on how you plan to protect your skin from the sun.
You can protect your skin from the sun by wearing sunscreen, a hat, sunglasses, long sleeves, and staying in the shade, all help to protect out skin
Approximately how old is the sun?
About 4.5 billion years old
T or F: Radiation needs air, water, or anything else to travel
False. Radiation can travel through empty space — it doesn’t need air, water, or anything else to move.
Give an example of conduction.
Give an example of convection.
Boiling water — hot water rises, cooler water sinks.
Why is having a thin ozone layer bad?
A thinner ozone layer = more UV rays reach us → more risk of sunburn and skin damage.