Chemistry Style Monday, October 1st

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

This is a way of showing the before and after of a chemical reaction The reactants are always first (on the left of the arrow) The arrow tells us that something is happening The products are always last (on the right of the arrow)

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.

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

1. Write the chemical formula for each molecule. 2. Add the coefficient for each molecule (how many did you make?) Double check with your group to make sure you all have it correct. 1. Write down the elements you have 2. Count how many atoms of each element you have

You have just analyzed the reactants for photosynthesis. You should have the following answers: 1. 6H 2 O and 6CO 2 2. Hydrogen: 12 Oxygen: 18 (6 from water and 12 from carbon dioxide) Carbon: 6

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

The products are what is made; the end result. 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. Gently take apart your 12 molecules Make sure you keep them in same color groups

Plants are autotrophic – they make their own food. Their food is sugar: glucose. They also make a gas: oxygen Gas production!

Build the following products of photosynthesis using the gum drops you took apart. Only make 1 of these Make 6 of these:

1. Write the chemical formula for each molecule. 2. Add the coefficient for each molecule (how many did you make?) Double check with your group to make sure you all have it correct. 1. Write down the elements you have 2. Count how many atoms of each element you have

You have just analyzed the products for photosynthesis. You should have the following answers: C 6 H 12 O 6 and 6O 2 Carbon: 6 atoms Hydrogen: 12 atoms Oxygen: 18 atoms

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?

You have just identified an example of the Law of Conservation of Mass Write your own definition for the law on the note card you have been given. Place the note card on a piece of notebook paper. Be ready to read & comment on at least 2 others. You will write your comments on the note book paper. Wait for the signal to move!

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.