World's Most Asked Questions: What Is Energy?(4:34)

World's Most Asked Questions: What Is Energy?(4:34)

Observing Energy – Section I

World's Most Asked Questions: What Is Energy?(4:34)

Questions:

  1. List 3 sources of energy
  2. How is the energy stored in a piece of wood?
  3. Is there more energy stored in the bonds or in the forces holding the nucleus together? How do you know?
  4. What are the names of the types of energy mentioned as being equivalent.
  5. Summarize the discussion about whether energy can be created or destroyed.

Amazing Energy Facts To Blow Your Mind(3:33)

Questions:

  1. Energy is stored in food as ______or ______. One food calorie is equivalent to ______.
  2. The average male needs ______joules per day.
  3. If this amount of energy came from electricity, how much would it cost in North America?
  4. This daily intake of food calories is equivalent to how many hand grenades? ______
  5. Every minute enough energy reaches earth from the sun to give us enough power for ______.

What is a Flame(7:30)

Questions:

  1. What two elements make up candle wax? ______and ______.
  2. The simple act of mixing oxygen from the air with the wax does not ignite it. Describe the process.
  3. What causes the blue flame? What is this process called?
  4. What makes so much heat?
  5. Describe why a shortage of oxygen causes yellow/orange/red flames. What is this process called?

Tricky Question: Exothermic or Endothermic?(3:12)

(system v surroundings discussion)

Questions:

  1. Define Exothermic
  2. Define Endothermic
  3. Explain why it’s important to define the system and surroundings before answering the question of whether a process is endothermic or exothermic.

Phase Changes: Exothermic or Endothermic?(6:43)

Questions:

  1. Environment is a synonym for ______.
  2. Melting, Boiling and Sublimating are (endothermic…exothermic) changes because ______.
  3. What memory device does he use to remember what endothermic means?
  4. Condensing, Freezing and Deposition are (endothermic…exothermic) changes because ______.
  5. What memory device does he use to remember what exothermic means?
  6. A positive change in energy, +∆H, is (endothermic…exothermic).
  7. A negative change in energy, -∆H, is (endothermic…exothermic).

The Kinetic Theory | GCSE Physics | Doodle Science(1:35)

Questions:

  1. The only difference between states of matter is ______.
  2. List 3 properties of Solids.
  3. List 3 properties of Liquids.
  4. List 3 properties of Gases.

Relationship Between Temperature and Kinetic Energy(1:37)

Questions:

  1. Temperature is a measure of ______.
  2. When temperature goes (up…down) average kinetic energy increases.
  3. When temperature goes (up…down) average kinetic energy decreases.

Eureka: conduction, convection, radiation(6:23)

Questions:

  1. What is the analogy given about how heat is transferred from particle to particle during conduction?
  2. What happens during convention to transfer heat?
  3. What isthe analogy given about how heat is transferred via radiation?

Heat Transfer - Radiation | GCSE Physics | Doodle Science(1:36)

Questions:

  1. What instrument is used to detect the thermal radiation given off by all objects?
  2. What physical property makes an object a good absorber of radiation, a poor absorber?

Heat Transfer - Conduction and Convection | GCSE Physics | Doodle Science(1:26)

Questions:

1.Conduction mainly happens in (solids…liquids…gases).

2.Particles must be (touching…not touching) during conduction heating.

3.Why do metals objects feel colder than wooden ones?

4.Describe how a convention current transfers heat from one place to another.

Thermal Equilibrium(1:29)

Questions:

1.Thermal energy flows from a body at (higher…lower) temperature to one of (higher…lower) temperature.

2.In your own words, what does thermal equilibrium mean?

Thermal Equilibrium(3:47)

Questions:

  1. In order for objects to reach thermal equilibrium, they must ______.
  2. What two variables are mentioned that affect the amount of heat transfer?
  3. Thermal energy is transferred by ______of the particles.
  4. What evidence in the simulation proves that heat energy moves from higher temperature to lower temperature? Explain using evidence on both the macroscopic and atomic level.

Chemical Thermodynamics, Energy, Enthalpy and Entropy - Mr. Causey's Chemistry(9:50)

Questions:

  1. Define chemical thermodynamics.
  2. Define system and surroundings.
  3. Define heat.
  4. Define the calorie. How does it compare to a food calorie? A joule?
  5. What does the Greek symbol delta, ∆, stand for?
  6. At 6:35 in the video, how are endothermic and exothermic changes in enthalpy defined?
  7. Define entropy. Give it’s symbol.
  8. The second law of thermodynamics states that entropy is always ______.

Eureka! Episode 21 Temperature vs Heat(4:50)

Questions:

  1. What are the boiling and freezing points of water on the Celsius scale?
  2. The higher the temperature, the (faster…slower) its particles move.
  3. Why did the ‘cooler’ water in the bucket heat the swimming pool up more than the ‘hotter’ water in the teacup?
  4. What is the difference between temperature and heat?

The Flow of Energy: Heat (6:42)

Questions:

  1. Describe the difference between kinetic and potential energy
  2. What symbol is used for the variable called heat? What are its units?
  3. What is the law of conservation of energy?
  4. How does the value of ‘q’ change for endothermic and exothermic situations?
  5. Define specific heat capacity. What are its units?

Mixing hot and cold water (7:06)

Questions:

  1. Why are the final temperatures going to be the same after mixing?
  2. Why can you cancel the value for the heat capacity of water from both sides of the equation?
  3. Will the final temperature be closer to the hottest temperature being mixed or to the temperature of the container with the most water? Explain.

Specific Heat Capacity of a Solid(3:44)

Questions:

  1. What is the Law of Conservation of Energy?
  2. What data needs to be measured in a calorimetryexperiment.
  3. What unknown can be calculated using this data?
  4. How does the Law of Conservation of Energy apply to this experiment?

Heat Capacity and Nature Of Substance(2:22)

Questions:

  1. What ‘evidence’ proves that different materials have different heat capacities?
  2. Heat is directly proportional to both the mass and change in temperature, what does this statement mean?

Calorimetry Calculations(9:04)

Questions:

  1. Our book uses the symbol for specific heat capacity, this video uses the symbol ____.
  2. A negative number for q means ______. A positive number for q means ______.
  3. Describe the differences between the 3 sample problems given. Describe the similarities.

Advantages Of High Specific Heat Capacity Of Water(3:12)

Questions:

  1. Describe 3 applications that use water for our benefit.
  2. How does the high specific heat capacity of water affect weather?

Air vs Water Heat Capacity(3:49)

Questions:

  1. What are the greenhouse gases mentioned in the video?
  2. Why are greenhouse gases considered ‘bad’ in terms of global warming?
  3. How much more heat energy can water absorb without a significant change in temperature as compared to air?

Reading – Heat V Temperature and Reason for Difference in Heat Capacity of Materials

Questions:

  1. Describe the 3 types of motion that molecules can have.
  2. Relate the 3 types of motion to the 3 states of matter.
  3. Describe the factors that affect the heat capacity of different materials.
  4. Would you need more or less energy to raise the temperature of a material with a high heat capacity to the same temperature as a material with a low heat capacity? Explain.

Reading – Why Materials Have Different Heat Capacitities

Questions:

  1. What is the First Law of Thermodynamics?
  2. How do we know when a system reaches thermal equilibrium?
  3. Explain why 10 grams of water at 90°C will raise the temperature of a cup of cold water much higher than would 10 grams of aluminum at 90°C.
  4. Describe why different metals have different specific heats.

Specific Heat of Water(1:39)

Questions:

1.What are hydrogen bonds?

2.After the hydrogen bonds are broken, what does the addition of more heat do to the molecules?

3.What ‘evidence’ do we have to indicate that the molecules are moving faster?

4.What property of water is listed as being unique?

Heating and Cooling Curve Explained(10:00)

Questions:

1.What variables are graphed on a heating curve?

2.How many states of matter are present during the inclined portions of the graph?

3.How many states of matter are present during the plateau portions of the graph?

4.Draw a sketch for the cooling curve for water. How is it similar, how is it different from the heating curve?

5.What state(s) of matter are present in line segment AB? BC? CD? DE? EF?

6.Why does the graph have plateaus, where is the energy going?

7.The first plateau corresponds to which phase change?

8.The second plateau corresponds to which phase change?

9.What is the symbol for the energy corresponding to melting?

10.What is the symbol for the energy corresponding to boiling?

Temperature (2:57)

Questions:

1.What is the difference between Celsius and Kelvin scales?

2.How do you convert between Celsius and Kelvin?

3.Are all particles at a given temperature moving at the same speed?

4.Temperature is defined as the ______.

5.At absolute zero, what happens to our particles?

6.Describe two advantages of using the Kelvin scale.

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