Lesson 1 Discussion

Your ideas about what happens to the food that animals eat

Your ideas:1.

Your questions:1.

What happens to the food that animals eat?

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 are atoms moving from? Where are 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?

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 forms of energy are in the reactants?

What molecules are carbon atoms in before the change? What other molecules are involved?

Where are atoms moving from?

What forms of energy are in the products?

What molecules are carbon atoms in after the change? What other molecules are produced?

Where are atoms moving to?

Chemical change

What Are Your Ideas about the Movement Question?

Where are atoms moving from?1.

Where are 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 produced1.

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 forever2.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 PredictionsPredicting 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 are 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

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

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

BTB Results for Ms. Angle’s Class

Day 1 Day 2start BTB

colorend BTB

colorgreen yellowgreen yellowgreen yellowgreen yellowgreen yellowgreen yellow

How do your results compare with the results from Ms. Angle’s Class?

Weight Results for Ms. Angle’s Class

How do your results compare with the results for Ms. Angle’s class?

Initial Mass Potato (g)

Initial Mass Worms (g)

Final Mass

Potato (g)

Final Mass

Worms (g)

Change in Potato

Mass (g)

Change In Worm

Mass (g)

10.58 15.87 10.10 16.07 -0.48 0.209.87 16.61 9.35 17.05 -0.52 0.44

11.57 15.41 10.94 15.65 -0.63 0.249.35 17.05 8.89 17.35 -0.46 0.30

13.59 14.77 12.88 15.01 -0.71 0.249.20 14.50 8.79 14.99 -0.41 0.49

Average change in weight = -0.54 +0.32

Explaining Group ResultsExplaining results for mass changes•How are the mass changes connected with The Movement Question: Where are 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?