Página — Uerakua Anapu Uantakua Projects And Readings 3° Secundaria (pág. 156)

1. In community, read the following text, underline the relevant ideas,and look for the meaning of the words you do not know.

A 30-year-old person's routine includes the following activities: He wakes up, prepares half a liter of robust coffee, and drinks it before leaving home. He then showers and washes his hair with shampoo.Then, he drives about two hours to work.

For lunch, he always has a double hamburger and a liter of soda.When he finishes work, he smokes cigarettes with his colleagues and drives back home for two hours again. When he gets home,he turns on the TV and all the lights. He sometimes forgets to turn them off when he goes to sleep.

On weekends, he goes camping in the mountain with his friends and lights bonfires.

2. In community, find three activities in the text that damage health and three that harm the environment. Write them in your notebook.

3. Discuss why you chose those activities.

4. Based on your knowledge, determine if the activities you read in the text are the result of natural chemical reactions or if human beings produce them.

5. Answer the following questions:

a) How can you identify what chemical reactions happen in the examples you chose?

b) What is the cause of chemical reactions?

c) Why do people say that chemistry is everywhere?

Where We Are Headed

1. Reflect on what you know about natural chemical reactions and those produced by human beings.

2. Read the following questions as a guide for your investigation. Use them or write some others.

a) What is the definition of a chemical reaction?

b) What is needed for a chemical reaction to happen?

c) What are chemical functions?

d) How are substances classified?

e) What types of chemical reactions are there?

f) Why is it important for humans to know the chemical reactions that happen in everyday life?

What elements must be included in a diet to be considered healthy?

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