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Energy Basics. The Law of Conservation of Energy – Energy canNOT be created or destroyed It may be Transformed to another form It may be transferred from.

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Presentation on theme: "Energy Basics. The Law of Conservation of Energy – Energy canNOT be created or destroyed It may be Transformed to another form It may be transferred from."— Presentation transcript:

1 Energy Basics

2 The Law of Conservation of Energy – Energy canNOT be created or destroyed It may be Transformed to another form It may be transferred from one object to another – TOTAL ENERGY ALWAYS STAYS THE SAME

3 Three main forms of energy 1.Potential Energy 2.Kinetic Energy – Heat Energy 3.Light Energy

4 Potential Energy Potential Energy: when an object stores energy. Examples: – Chemical Potential Energy : sugar is a chemical that stores energy – Gravitation Potential Energy : when an object is elevated against Earth’s gravity – Other Examples: A stretched Rubber Band

5 Kinetic Energy Kinetic Energy : Energy of Motion

6 Heat Energy Heat Energy: Energy in the form of moving atoms/ kinetic energy of atoms.

7 Light Energy: Light Energy: Energy in the form of light waves/ photons.

8 Transformation of Energy – Energy canNOT be created or destroyed – It may be Tranformed to another form – Examples: – Light energy is transformed to chemical energy (sugar) by photosynthesis in plants – Chemical Energy (sugar) is transformed to heat energy by respiration in living organisms – Gravitational Potential energy is transformed to kinetic energy when a ball is dropped.

9 Transfer of energy – Energy canNOT be created or destroyed – It may be transferred from one object to another ENERGY STAYS IN THE SAME FORM, BUT MOVES TO A DIFFERENT OBJECT. – Examples: – The Kinetic Energy of a the queue/ white ball is transferred to the 8 ball during a pool game.

10 Practice: what kind of energy does this climber have?

11 Rube Goldberg Video Energy Transfer or Transformation? Explain: – Energy forms involved – Where does the transfer/ transformation take place? Y8w

12 Does a windmill represent energy transfer or transformation? Energy Transfer or Transformation? Explain: Energy forms involved? Where does the transfer/ transformation take place?

13 Deep Water Solo: pcY Energy Transfer or Transformation? Explain: Energy forms involved? Where does the transfer/ transformation take place?

14 Do solar panels represent energy transfer or transformation? Energy Transfer or Transformation? Explain: Energy forms involved? Where does the transfer/ transformation take place?

15 Is this an energy transfer or transformation? Energy Transfer or Transformation? Explain: Energy forms involved? Where does the transfer/ transformation take place?

16 Today’s Activity Safety Considerations: – Goggles and Lab coats must be warn at all times – If you spill anything on your hands or other body parts, DON’t Panic but wash in the sink immediately. – Don’t get any chemicals in your eyes but if you do let me know immediately and we will flush it with water. – NO HORSE PLAY …STAY SERIOUS….

17 Today’s Activity Safety Considerations: – Wash your hands after you leave the lab today – DON’T through matches in the garbage. There are tin cans to dispose of them. – DON’T light anything on fire that you are not suppose to……… – Follow directions carefully – Be mindful of your movement in the lab and the movement of others.

18 Station 1:Teacher Demo Sodium and Water Na + H20 ---> NaOH + H2 What do you observer? Is this a energy transfer or Transformation? Explain

19 Teacher Demo Station 2 Solid barium hydroxide reacted with solid ammonium thiocyanate produces barium thiocyanate, ammonia gas, and liquid water.

20 Station 3: Rub your hands together for 30 seconds. Write down what you observe.

21 Station 4: Burn Magnesium Magnesium & Oxygen – CAUTION: Do not look directly at burning magnesium. – Position a watch glass near the gas burner. – Using crucible tongs, grasp one end of the 5-cm strip of magnesium ribbon and hold it in the burner flame until the magnesium ignites. – Quickly position the burning magnesium so that the combustion products fall on the watch glass.

22 Station 5: Drop a marble into clay Drop a marble into clay from two different heights – 30 cm – 90cm Measure and record the diameter of the crater formed in mm Write down your observations and give a reason for your results

23 Station 6 Add 30 drops (2 mL) of Hydrogen Peroxide to a medium-sized test tube. Clamp the test tube to a ring stand. Add a little bit of soap to catch gas. Add 10 drops (1 mL) of potassium iodide to a different test tube. Quickly pour the KI to the H 2 O 2. Record your Observations: What do you see?

24 Station 7 Place 20 drops (2 mL) of HCl into one of your test tubes. Add 2-3 pieces of Magnesium Feel the test tube Record your Observations: What do you see, hear & feel?

25 Station 8 Procedure: 1.Attach a sticky note to the widest side of an eraser. Make sure the sticky note covers the entire side of the eraser 2.Place the eraser from step 1 note side down, next to a second eraser so that one end of each eraser extends 2 cm over the end of the table. 3.Use a ruler to strike both erasers evenly and firmly at the same time. 4.Measure and record the distance each eraser slides from the end of the table. 5.Record the sliding distance in OBSERVATIONS: 6.Complete your energy activity table for station 8

26 Station 9 Place 20 drops of Acetic Acid into one of your test tubes Using a thermometer record the temperature of the acetic acid solution. Add 1 tiny scoop of Sodium Bicarbonate Feel the test tube Record the new temperature of the mixture. Complete your energy activity table for station 8

27 Station 10 Measure some water (somewhere between mL) in a graduated cylinder and add it to a beaker. Before heating, record the temperature of the water (do not let the thermometer touch the glass). Holding the chip with tongs, use a match to start the chip on fire. Heat the water with the burning chip. After the chip is completely burned, record the final temperature of the water Complete your energy activity table for station 9

28 Station 10 Set-up


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