Warm Up

1
Warm Up

• 1. What is the independent variable
• What is the dependent variable?
• What is the relationship between the of pizza
  toppings and cost of the pizza?
• How much does a pizza with 3 toppings cost?
• MATH What is the slope of this line?

2
Energy

• Energy is the ability to do work.
• Work is a transfer of energy.
• Energy and work are expressed in units of joules
  (J).

3
(No Transcript)
4
The two main forms of energy are

• Potential energy- stored energy that can be put
  into future use

• Kinetic energy- the energy of motion.

5
The two main forms of energy are

• Potential energy
• Chemical
• Nuclear

• Kinetic energy
• Electromagnetic (light)
• Thermal (heat)
• Sound
• Electrical

Mechanical (motion) mechanical
(position)
6

• Mechanical energy is the total energy of motion
  and position of an object.
• mechanical energy ? potential energy ? kinetic
  energy

7
(No Transcript)
8

• More mass and/or higher velocity more KE
• More mass and/or higher above the ground (resting
  position) more PE

9
22. Use the diagram to answer the question below.

• Each ball has the same mass. Which ball has the
  greatest potential energy?
• Ball A
• Ball B
• Ball C
• Ball D

10

• Thermal Energy is the energy of moving molecules
• All matter has thermal energy
• Higher temperature more KE

11
(No Transcript)
12

• http//www.youtube.com/watch?vte7aFC8DTls
• http//phet.colorado.edu/en/simulation/states-of-m
  atter-basics

13

• Electrical Energy - the energy of moving
  electrons.

14

• Sound Energy moves through vibration of matter
• Travels in waves
• MUST have matter to travel through

15
Seeing Sound Waves

• http//www.youtube.com/watch?vDPUlss0_Lkk

16

• Electromagnetic Energy is produced by the
  vibrations of electrically charged particles.
• Travels in waves
• Does NOT need matter to travel
• Examples light, x-rays, microwaves

17
Compare/Contrast Light and Sound
Light
Sound
Kinetic energy
Needs matter to travel
Doesnt need matter to travel
Travel in waves
Happen because particles vibrate
18

• Chemical Energy stored in bonds between atoms
• Examples food, fuel, batteries

19
(No Transcript)
20

• Nuclear Energy stored in nucleus of an atom
• Fusion- nuclei join
• Fission- nucleus is split
• Example sun creates light/heat through fusion of
  hydrogen nuclei into helium

21

• http//phet.colorado.edu/en/simulation/nuclear-fis
  sion

22
What type of energy?
23
What type of energy?
WHY?
24
What type of energy?
25
What type of energy?
26
Heat from a toaster
27
Heat from a toaster
28
Ring from a Cell Phone
29
Ring from a Cell Phone
30
Lump of Coal
31
Lump of Coal
32
Moving Bus
33
Moving Bus
34
Law of Conservation of Energy

• Energy cannot be created or destroyed only
  transferred from one form to another

35
1. Ball Rolling Down A Hill
To
From
36
Ball Rolling Down A Hill
To
From
37
2. Light Bulb
To
From
38
Light Bulb
To Electromagnetic Energy
From Electrical Energy
39
3. Electric Oven
To
From
40
Electric Oven
To Heat
From Electricity
41
4. Battery Powered Flashlight
To
From
42
Battery Powered Flashlight
To Electromagnetic Energy
From Chemical Energy
43
6. Tree
To
From
44
Tree
To Wood
From Sunlight
45
7. Ipod
To
From
46
Ipod
To Sound
From Batteries
47
8. Solar Panels
To
From
48
Solar Panels
To Electricity
From Light
49
6. Nuclear Power Plant
To
From
50
Nuclear Power Plant
To Electricity
From Nuclear Fission
51
7. Wind Farm
To
From
52
Wind Farm
To Electricity
From Movement
53
8. Dam (Hydroelectric Plant)
To
From
54
Dam (Hydroelectric Plant)
Input Moving Mechanical Energy
Output Electricity
55
9. TV
To
From
56
TV
To Sound and light
From electricity
57
11. Fire
From
To
58
Fire
To Heat And Light
From Wood
59
12. The Sun
To
From
60
The Sun
To Heat And Light
From Nuclear Fusion
61
13. Car
To
From
62
Car
To
From Gas
63
Exit Slip
1. Jose ate a turkey sandwich and an apple for
lunch. Later that day, he ran 2 miles during
soccer practice. Which of the following energy
transformations occurred between lunchtime and
the end of Joess run? a) Thermal energy was
converted to kinetic energy. b) Kinetic energy
was converted to chemical energy. c) Electrical
energy was converted to thermal
energy. d) Chemical energy was converted to
mechanical energy.
2. What kind of energy transformation happens in
a television? a) Light is transformed into
electrical energy b) Electrical energy is
transformed into chemical energy. c) Electrical
energy is transformed into light
energy. d) Chemical energy is transformed into
light energy.
64
Exit Slip

• What kind of energy transformation happens when a
  person rides a bike down a hill?
• Light energy is transformed into chemical energy.
• Electrical energy is transformed into kinetic
  energy.
• Potential energy is transformed into kinetic
  energy.
• Kinetic energy is transformed into potential
  energy.

4. What kind of energy transformation happens
when firewood it lit in a campfire? a) Light
energy is transformed into chemical
energy. b) Chemical energy is transformed into
thermal energy. c) Potential energy is
transformed into kinetic energy. d) Kinetic
energy is transformed into potential energy.
65
Exit Slip
5. What king of energy transformation occurs when
you eat food and then do jumping jacks? a) Light
is transformed into chemical energy. b) Electrical
energy is transformed into chemical
energy. c) Chemical energy is transformed into
mechanical. d) Potential energy is transformed
into Chemical energy.