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Transcript

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 Protein

Examples of Fats

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?

Carbohydrates Continued:

  • 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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