What Chemicals are Important for Life?
Proteins:
Lesson Self Check:
Importance of Nutrients:
- What is the most important properties of water for life?
- How does your body use carbohydrates and fats?
- What do proteins do in your body?
- What are vitamins and minerals?
- How can you get all the nutrients you need?
- Keeping your body working properly
- Have to get regular supply of carbohydrates proteins, and fats from foods you eat
- Each source provides different chemicals your body needs
- Body also needs minerals and vitamins in small amounts
- Another kind of chemical important for life
- Examples: Meats(beef, chicken, fish),beans, nuts, eggs and cheese
- Provide energy for living things
- Help repair damaged cells and build new ones
- Hair, muscles, and skin are made mostly of proteins
- Control body activities such as heart rate and the breaking down of food in the body
Fats:
Self Check:
- What do fats do?
- Do fats contain the most amount of energy?
- What are some examples of fat?
- Can be fuel chemicals too
- Store large amounts of energy that are released when they are broken down
- Contain the most energy
- Examples: beef, butter, cheese and peanut butter
- Fats can be related to oils too
Did You Know?
Humans can survive up to several weeks with now food. However, they can survive only a few days without water.
Self Check:
Examples of Carbohydrates
Importance of Water:
- What is one of the most important properties of water?
- Can life exist without it? Why or why not?
- What does the liquid in living things contain?
- Life cannot exist without water
- The most plentiful chemical in living things
- Water is a useful chemical: special properties of water allow it to break things apart into tiny particles (dissolves other chemicals)
- The liquid found in living things is a solution of salts, water, and other chemicals
Unit Objectives:
Carbohydrates:
Vocabulary Words:
- Explain why water is important to life
- Describe how living things use carbohydrates, fats and proteins
- Discuss the importance of eating a variety of foods
- Solution: A mixtures in which the particles are evenly mixed
- Carbohydrate: A sugar or starch, which living things use for energy
- Fat: A chemical that stores large amounts of energy
- Mineral: A chemical found in the foods that is needed by living things
Vocabulary Continued:
- Nutrient: Any chemical found in foods that is needed by living things
- Protein: A chemical used by living things to build and repair body parts and regulate body activities
- Vitamin: A chemical found in foods that is needed by living things in small amounts
Self Check:
- Carbohydrates are sugars, starches and fiber which living things use for energy
- Sugar examples: Cane sugar, fruits, vegetables, etc. (come from plants)
- Starch examples: bread, cereal, pasta, rice and potatoes
- Fiber Examples: Broccoli, Almonds, Banana's, Lentils, Vegetables Etc.
- Why energy? Energy is needed to carry on life activities, energy comes from fuel and carbs are fuel chemicals (think gasoline in a car)
- Plants and other living things use carbohydrates for energy too (Animals get energy from the carbohydrates that plants make)
- What are carbohydrates?
- What are examples of carbohydrates?
- Why is energy important?
- 2 Different Types of Carbohydrates
- Complex Carbs: Complex carbohydrates are starches. They take longer to digest.
- Simple Carbs: Simple carbohydrates are made up of just one or two sugar molecules. They break down easily.
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