M4 L2 Gizmo Simulation: Cell Energy Cycle
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. What does a plant need to survive and
... [Show More] grow? Water air sun
2. What does an animal need to survive and grow? Water food shelter
3. How do animals and plants depend on each other?
Animals eat the food and the plants grow off of it
Gizmo Warm-up
The Cell Energy Cycle Gizmo™ illustrates two processes that are essential to life:
photosynthesis and cellular respiration.
Although both of these reactions involve a series of complex steps, the basic reactants and products in each process are four relatively simple molecules.
1. What is the chemical formula of oxygen? 02
2. Glucose is a simple sugar. What is the chemical formula of glucose? c6h1206
3. What is the chemical formula of carbon dioxide? c02
4. What is the chemical formula of water? h20
Activity A: Photosynthesis Get the Gizmo ready:
· If necessary, click Reset.
· Check that the PHOTOSYNTHESIS tab is selected. Check that Description is turned on.
Introduction: Photosynthesis occurs in the chloroplast, an organelle found in plant and algae cells. Within the chloroplast, a green pigment called chlorophyll converts the radiant energy of sunlight into chemical energy that the plant can use.
Question: What are the reactants and products of photosynthesis?
1. Predict: Of the molecules shown on the CHEMICALS pane, which do you think are reactants (ingredients) in photosynthesis? Which do you think are products?
A. Reactants: light energy, carbon dioxide and water
B. Products:
Oxygen that is released into the atmosphere.
Glucose that is used by the plant as energy and to make other molecules such as starches and sucrose
Explore: Drag each molecule from the CHEMICALS pane to the chloroplast on the PHOTOSYNTHESIS pane. If a molecule is a reactant, it will stay in the chloroplast.
2. Which molecules are reactants in photosynthesis? H20 c02
3. Observe: Click Add light and look at the Output. What are the products of photosynthesis? 02 c6h1206
4. Summarize: A chemical equation shows reactants on the left side of an arrow, and products on the right, like this: reactant + reactant → product + product. Based on your observations, what is the chemical equation for photosynthesis?
Turn on Show chemical equation to check. Were you correct? [Show Less]