1. What materials do plants need in order to make food?

2. How is chemical energy formed in plants?

3. Why are chemical energy and the chemical processes that produce energy important in life?

1. What new substance is formed when the materials needed by plants are combined in the leaves?

2. Why is this substance important?

3. What are the other examples of how energy is formed?

ü If a child eats a lot of junk food and does not like vegetables and fruits, what kind of chemical energy will be used?

Choose the letter of the correct answer.

1. When is chemical energy produced in our bodies?a. When oxygen and digested food combineb. When carbon dioxide and food combinec. When water and oxygen combined. When heat and energy combine

2. How is the chemical energy stored in food best used by the human body?a. For movementb. For growthc. For increasing weightd. For growth and development

3. Which device uses chemical energy to produce sound in portable radios?a. Flashlightb. Generatorc. Motord. Dry cell battery

4. Why can the body perform various activities? Because _________.a. of the water it containsb. of oxygen in the bloodstreamc. of energy it gets from foodd. of the heat from the surroundings

5. Why is chemical energy necessary for life?a. it makes our works easier and fasterb. it’s used to main our body processes and natural processes like photosynthesisc. it provides soundd. it makes the object moves