1. Energy—Day 10 Materials Needed: Writing Utensil Folder Notebook Get out your review handout! Get out a piece of paper & put your heading on it

2. B ELL WORK & AGENDA DAY 10 1. What is the formula to calculate kinetic energy? 2. How does one form of energy get converted into another form in a cell phone device? 3. A 0.50 kg ball is thrown into the air and rises to a height of 15 m. How much potential and kinetic energy did the ball initially have? Agenda BLAM Test over work, power, kinetic & potential energy, and law of conservation of energy

3. Q1: W HAT PROPERTY OF MATTER CAUSES WAVES TO TRAVEL AT DIFFERENT SPEEDS THROUGH SOLIDS, LIQUIDS, AND GASES ? SC8.2.3.b DOK 1 A. density B. color C. mass D. size

4. Q2: W HICH HUMAN BODY SYSTEM CONTROLS ALL BODY FUNCTIONS ? A. c irculatory system B. d igestive system C. n ervous system D. u rinary system S.C.8.3.1.d DOK1

5. MATH BOOSTER D AY 10 If a = - 3 and b = 3, what is the value of

6. G REEK & L ATIN D AY 10 Greek /LatinParagraph meter axi goni leg oper

7. OBJECTIVE D AY 10 1. I will know (knowledge): the definitions and concepts of work, power, and energy. 2. I will be able to (skill): mathematically solve story problems for work, power, and energy.

8. B ELL WORK DAY 10 – ANSWERS #1 & #2 1. What is the formula to calculate kinetic energy? Answer: Kinetic Energy = ½ mv 2 2. How does the one form of energy get converted into another form in a cell phone device? Answer: The chemical energy of the battery changes into electrical energy, which turns the cell phone on. When we talk on the phone the sound energy gets converted into electrical energy, which is transmitted through the air. 3. A 0.50 kg ball is thrown into the air and rises to a height of 15 m. How much potential and kinetic energy did the ball initially have? Answer: Since the ball’s initial stage is considered to be at zero, the height of the ball is zero so the potential energy of the ball will be zero there too. All the kinetic energy got converted into gravitational potential energy. So, KE = PE = m × g × h = 0.15 × 9.8 × 20 = 29.4 joules.

9. B ELL WORK DAY 10 – ANSWER #3 3. A 0.50 kg ball is thrown into the air and rises to a height of 15 m. How much potential and kinetic energy did the ball initially have? Answer: Since the ball’s initial stage is at ground level the potential energy of the ball will be zero. All the kinetic energy got converted into gravitational potential energy. Givens: 0.5 kg = m 15 m = h g = 9.8 m/s 2 Unknown: KE & PE Equation: KE = PE = mgh Plug in numbers: = (0.5 kg)(9.8 m/s 2 )(15 m) = 73.5 joules Answer: KE = 73.5 J PE = 0 J

10. A1: W HAT PROPERTY OF MATTER CAUSES WAVES TO TRAVEL AT DIFFERENT SPEEDS THROUGH SOLIDS, LIQUIDS, AND GASES ? SC8.2.3.b DOK 1 A. density The less dense that matter is, the farther away the particles are, and the slower the wave will travel through it. B. color The color of a material has nothing to do with how fast a wave will travel. C. mass The mass of a material has nothing to do with how fast a wave will travel. D. size The size of a material has nothing to do with how fast a wave will travel

11. A2: W HICH HUMAN BODY SYSTEM CONTROLS ALL BODY FUNCTIONS ? A. c irculatory system The circulatory system contains blood, which carries nutrients and oxygen to all body parts. B.digestive system The digestive system breaks down the food in the body and uses it for energy. C.nervous system The nervous system controls all human body functions by transferring information to and from the brain. D.urinary system The urinary system cleans and removes waste from the blood. S.C.8.3.1.d DOK1

12. MATH BOOSTER D AY 10 -- ANSWER If a = - 3 and b = 3, what is the value of = = -14

13. I NDEPENDENT WORK D AY 10 TEST

14. NOT D O NOT D O THE F OLLOWING Q UESTIONS : Level 2: 8 16 Level 3: 3 4 5 6 7 Level 4: 2 3

15. 1. Read pages # 474 to 475 and answer the question given below. -Which has more thermal energy, a cup of tea or a pitcher of juice?

16. E XIT Q UESTION : Is there anything you could have done differently in the energy unit?