1) The document discusses circuit design and environmental science. It explains the four basic components of an electrical circuit: an energy source, conductor, switch, and electrical load. It also discusses resistors and provides circuit diagrams. 2) The document then discusses environmental science and how human activities like building and farming have impacted the environment. It specifically discusses greenhouse gases which trap heat and are a cause of climate change. 3) Physics can help address climate change through understanding thermodynamics of how greenhouse gases trap heat and developing better batteries to reduce fossil fuel use.

1. CIRCUIT DESIGN -
ENVIRONMENTAL
SCIENCE

2. GROUND RULES
• The same ground rules apply.
• Raise your hand.
There is a little hand in the bottom-left to do
that.
• Everyone raise your hand and then put down
your hand.
• Everyone type something into the message
board
• Let’s still have fun!

3. QUIZ TIME
1. Name 2 of the 4 components of an
electrical circuits.
2. Give an example of each.

4. • Think about what goes on we you flip a
switch that turns your living room lights on.
• There are four basic components to a circuit:
1. The Energy Source - Battery, power
outlet, stuff like that!
2. The Conductor - The copper wires. What
types of stuff are conductors?
3. The Switch - Pretty easy, it flips on/off
light…but how?
4. The Electrical Load - A lightbulb,
computer, playstation
WHAT ARE THE PIECES OF A CIRCUIT?

5. 2. THE CONDUCTOR
• What are conductors?
• When you touch a battery in the right way,
electrons move easily from atom to atom.
• This can be a piece of metal (a solid) or a salt
water (a liquid)

6. • The switch blocks the electrons from getting past to the light
bulb.
• It creates and “open” the circuit when switched off and a ‘closed”
circuit when switched on.
3. THE SWITCH

7. 4. THE ELECTRICAL LOAD
• Electrical loads are things that use the battery.
This could be a light bulb, lab top, television, ipad, switch, cars

8. • What if you have a really really really big battery.
• But all you wanted to power was a nightlight????
• It would be too too too much power for the night light.
• Well, that’s where resistors come in!
ANOTHER TYPE OF ELECTRICAL LOAD

9. •A RESISTOR ONLY LETS SOME
ELECTRICITY THROUGH A
CIRCUIT.
•RESISTORS ARE USED IN
ALMOST EVERY TYPE OF
CIRCUIT.
•IT IS VERY IMPORTANT TO ONLY
LET A CERTAIN AMOUNT OF
ELECTRICITY THROUGH TO A
NIGHT LIGHT, COMPUTER OR
REFRIGERATOR!!!
RESISTORS
This is a resistor!

10. CIRCUIT DIAGRAMS AND SYMBOLS
Battery
Resistor
Light Emitting Diode (LED)
• A diode acts as a one-way switch for current. It allows
current to flow easily in one direction, but severely
restricts current from flowing in the opposite direction
• Diodes change alternating current (ac) into pulsating
direct current (dc).

11. CIRCUIT DIAGRAMS AND SYMBOLS
Let’s draw some circuit diagrams!
What is the extra
symbol in the diagram
and what do you think
it does?

12. Circuit we will build
Just a reminder of what the led symbol means

13. ENVIRONMENTAL
SCIENCE

14. ENVIRONMENTAL SCIENCES
• What is environmental
sciences?
Well, we will talk about how
hoomans (cat spelling) have
impacted the world.
• An easy example is buildings.
1. When dug up the materials
needed
2. Cleared a place to build
3. Built a building

15. OTHER EXAMPLES
• Not all changes are bad
We change our environment for
farming and raising cattle, sheep, and
other trampoline loving animals!

16. OTHER EXAMPLES
• Some changes are really bad!

17. WHAT ARE THEY AND WHY ARE THEY BAD?
GREEN HOUSE GASES
• Gases that trap heat in the atmosphere
are greenhouse gases.
They let sunlight pass through the
atmosphere, but they prevent the heat
that the sunlight brings from leaving the
atmosphere.
• They get their name from greenhouses.
A greenhouse is full of windows that let
in sunlight. That sunlight creates
warmth. The big trick of a greenhouse is
that it doesn’t let that warmth escape.

18. GREENHOUSE GASES
• Overall, greenhouse gases are a
good thing.
• Without them, our planet would
be too cold, and life as we know
it would not exist.
• But there can be too much of a
good thing.
• Scientists are worried that human
activities are adding too much of
these gases to the atmosphere.

19. WHAT CAN PHYSICS DO ABOUT THIS?
• Climate change affects humans and natural
environments today and particularly in the future.
• Physics play a central role in understanding
climate change in-depth and building a climate-
friendly world.
• Important topics are thermodynamics and
electricity.
Thermodynamics- is the study of temperature,
heat, and the movement of atoms.
Electricity- What is electricity class?

20. PHYSICS AND THE ENVIRONMENT
• If we can better understand how thermodynamics works, it will
provide more solutions to the green house gases trapping heat.
• If we can make better batteries then we need less and less fossil
fuels
Who remembers how batteries work?
• Let’s review!

21. REVIEW
• What are the four basic components of a circuit?
• What is a greenhouse gas?
• Where do greenhouse gases come from?
• What two parts of physics can help with greenhouse gases?
• How will these two parts of physics help?