Lesson 1 Discussion Your ideas about what happens

Lesson 1 Discussion Your ideas about what happens to the food that animals eat

What happens to the food that animals eat? Your ideas: 1. Your questions: 1.

Lesson 3 Investigation Investigating Growing and Moving Mealworms

Lesson 3 Activity 1 Initial explanations, predictions, and planning

Answering the questions for mealworms growing and moving What are your ideas? • The Movement Question: Where atoms moving? (Where atoms moving from? Where atoms going to? ) • The Carbon Question: What is happening to carbon atoms? (What molecules are carbon atoms in before the process? How are the atoms rearranged into new molecules? ) • The Energy Question: What is happening to chemical energy? (What forms of energy are involved? How is energy changing from one form to another? )

What happens when mealworms eat food? Where atoms moving to? Where atoms moving from? Chemical change What molecules are carbon atoms in before the change? What other molecules are involved? What forms of energy are in the reactants? What molecules are carbon atoms in after the change? What other molecules are produced? What forms of energy are in the products? Remember: Atoms last forever (so you can rearrange atoms into new molecules, but can’t add or subtract atoms) Energy lasts forever (so you can change forms of energy, but energy units can’t appear or go away)

What Are Your Ideas about the Movement Question? Where atoms moving from? 1. Where atoms going to? 1.

What Are Your Ideas about the Carbon Question? What molecules are carbon atoms in before the change? What other molecules are involved? 1. What molecules are carbon atoms in after the change? What other molecules are produced 1.

What Are Your Ideas about the Energy Question? What forms of energy are in the reactants? 1. What forms of energy are in the products? 1.

Three facts about matter: 1. Atoms last forever 2. Atoms make up the mass of all materials. 3. Atoms are bonded to other atoms in molecules. Two facts about energy: 1. Energy lasts forever. Energy is never created or destroyed in chemical changes. 2. Energy can be transformed from one form to another. Some common forms of energy include: – Heat – Light – Motion – Chemical energy: energy stored in bonds of molecules

Making Predictions Predicting mass changes • What materials will gain and lose mass when mealworms grow and move? • How are the mass changes connected with The Movement Question: Where atoms moving? • Use arrows on the worksheet to show your ideas Predicting BTB changes • How will mealworms growing and moving change BTB? • How are the BTB changes connected to The Carbon Question: What is happening to carbon atoms? • Explain your ideas on the worksheet. How do you think that energy is changing from one form to another? • Explain your ideas on the worksheet.

Planning the Investigation • How will you measure mass changes? • How will you observe changes in the color of BTB?

Lesson 3 Activity 2 Investigating mealworms eating

Let’s do the investigation! • What mass changes do you observe? • What changes in BTB do you observe?

Possible BTB Colors

Comparing Group Results for mass changes Results for BTB changes • What patterns are there in measurements made in observations made by by all the groups? • Do the patterns match your predictions?

BTB Results for Ms. Angle’s Class Day 1 start BTB color green green Day 2 end BTB color yellow yellow How do your results compare with the results from Ms. Angle’s Class?

Weight Results for Ms. Angle’s Class Final Change in Change In Initial Mass Potato Worm Potato (g) Worms Potato (g) Mass (g) 10. 58 15. 87 10. 10 16. 07 -0. 48 0. 20 9. 87 16. 61 9. 35 17. 05 -0. 52 0. 44 11. 57 15. 41 10. 94 15. 65 -0. 63 0. 24 9. 35 17. 05 8. 89 17. 35 -0. 46 0. 30 13. 59 14. 77 12. 88 15. 01 -0. 71 0. 24 9. 20 14. 50 8. 79 14. 99 -0. 41 0. 49 Average change in weight = -0. 54 +0. 32 How do your results compare with the results for Ms. Angle’s class?

Explaining Group Results Explaining results for mass changes • How are the mass changes connected with The Movement Question: Where atoms moving? • What unanswered questions do you have? • • Explaining results for BTB changes • How are the BTB questions connected to The Carbon Question: What is happening to carbon atoms? • What unanswered questions do you have? What did we learn about the Chemical Energy Question? What unanswered questions do you have?