5 th grade

The process where plants make their own food Plants are autotrophic Auto = by itself (think automatic) Trophic = feeding Uses sunlight, carbon dioxide, and water

Today we are going to make the reactants for photosynthesis. Reactants can be the “ingredients” that are mixed together to make something new. Reactants can also be one thing that ends up breaking apart to make some new things.

You will create the reactants for photosynthesis. You should have the following : 1. Hydrogen: 12 Oxygen: 18 (6 for water and 12 for carbon dioxide) Carbon: 6

Use the following diagram to make some molecules: HH O COO Make 6 of these

These 2 reactants come together and using sunlight, make the products of photosynthesis. The beginning of the photosynthesis equation looks like this: 6H 2 O and 6CO 2  Reactants Yields Sunlight

In order for something new to be made, the bonds of the molecules are broken and they recombine with the other atoms to make something new. The first thing to happen is the plant removes the carbon from the carbon dioxide molecule and releases the oxygen back into the air. C OO

Plants are autotrophic – they make their own food. Their food is sugar: glucose. They also make a gas: oxygen Now it’s time to make the glucose molecule. Gas production!

Build the following products of photosynthesis using the gum drops you took apart. CCCCCC H H HHH H H H H H HH O OOOOO Only make 1 of these Make 6 of these:

Write the entire equation out in your notes: 6H 2 O and 6CO 2  C 6 H 12 O 6 and 6O 2 Complete the following: Carbon:Carbon: Hydrogen:Hydrogen: Oxygen:Oxygen: What do you notice about the atoms on each side?

Matter is not created nor destroyed. It just changes form. We did not have to add any atoms  it just changed Atoms of elements MUST be equal on either side. By counting atoms, you can see if the equation supports this law. If the numbers are equal, we say the equation is balanced.