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6th Grade Science / Lesson 8 - Cells and Energy

Cells and Energy
What will we be learning today?

  • In this lesson, we are going to learn all about where cells get energy.

Where Do Cells Get Energy?

  • Where do you get energy from? Why do you need energy? Cells need energy to carry on life processes like growing and active transport.

  • Would you believe that cells get their energy from the Sun? More directly they get it from food-in particular, molecules of carbohydrates such as sugars.

  • The Sun's energy is stored in the food.

Trapping the Sun's Energy

  • The Sun's energy is stored in food in the food-making process.

  • This activity goes on in cells that have chloroplasts-for example, the cells of a green leaf of a plant.

  • Chloroplasts contain a substance called chlorophyll. When a leaf is exposed to sunlight, the chlorophyll "traps" energy from the Sun


  • The trapped energy is used for photosynthesis. This is a food-making process that uses sunlight to produce sugar. It occurs in cells of green plants and other kinds of producers, such as a one-celled euglena.

  • The producers take in water from the soil and carbon dioxide from the air as raw materials and change them into two products. The products are sugar (the food) and oxygen

Let's Review What We Learned Today!

  • Now complete your worksheet!