Question

1. TRUE FALSE Air pollution is a new problem and was not heard of before the middle of the 19^th century, when we started burning fossil fuels.

2. When you run a race, you get warm. This is an illustration of which Law of Thermodynamics?
   1. First
   2. Second
   3. Third
   4. Fourth
   5. None of them

3. Which of these is NOT true of human muscles?
   1. They require energy to contract
   2. They work by shortening
   3. Like most body processes, their source of energy is ATP
   4. They convert chemical energy to mechanical energy
   5. All of these are true

4. Identify the compound with the lowest amount of chemical energy.
   1. Glucose
   2. Starch
   3. CO₂
   4. Fat

5. TRUE FALSE Combustion is evidence that there is energy in some chemicals, such as in the chemicals in coal or wood.

6. Which of these is an important product of the combustion (burning) reaction?
   1. O₂
   2. CO₂
   3. Carbohydrates
   4. Methane

7. Which of these processes does NOT depend on chemical energy (at least not directly)?
   1. Contraction of your muscles to do work
   2. An internal combustion engine
   3. Toasting your English muffin
   4. Cooking dinner over a campfire

8. Which of these must be delivered to your cells more or less constantly?
   1. Protein
   2. Oxygen and carbon dioxide
   3. Oxygen and a sugar, specifically glucose
   4. Fats and oils
   5. None of these

Answer 1

1 Ans: First law of thermodynamics.

According to first law of thermodynamics energy neither be created nor destroy it can change from one form to another form.

When you run your physical energy will convert into heat energy.

2.Ans:

All of these correct

All the options are the functions of Human muscles.

3 Ans: Glucose has lowest amount of chemical energy.

4 Ans:

Option B

An internal cumbustion engine is converted thermal energy to kinetic energy which is not related to chemical energy

5 Ans:

Not sure

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