Warm Up p 26 DateSession # ActivityPage # 10/5-7 12Chemical Change Text analysis29 Chemical Properties & Change Text30 10/8-9 13Chemical Change Lab31 Homework: Finish reading & talking to text: Chemical Properties & ChangeText Answer text analysis questions on p 30 Retest today, before and after school 1.How much NH 4 Cl can be dissolved in 100g of H 2 O that is 70ºC? 2. What is the density of a substance that has a mass of 25g and a volume of 17 cm³

Identify Roadblocks Scan the text for road blocks. Circle terms and phrases that are unfamiliar to you Circle familiar words, terms or phrases that the author uses in unfamiliar ways.

Identify Survival Words Identify which of the potential roadblocks you noted are really important for understanding the text. These ar eyour survival words. Write up to four of these words in the table. For each survival word, make notes explaining how you know that word is important for understanding the text.

Survival Word ABCDWhy is it important Key: A: I’ve never seen the word before. B: I’ve seen the word, but I don’t use it. C: I know the meaning, but I don’t use it D: I know the meaning, and I use the word

Share With your partner, take turns sharing your survival words and discuss treasons for selecting them.

Whole Group Share Which words did you chose? What makes them important for understanding the text?

Survival Word Think Aloud The biomass in Pond A was measured every 30 days for 120 days. Relative biomass was then calculated for each of the 5 days. Choose one word from your survival words table that you’d like to think aloud with.

Answer text analysis questions on p 30 What strategies did you use to make sense of this text? What was your “Read Aloud” survival word? How did you determine its meaning? Compare and contrast physical and chemical changes, using evidence from the text. This should be a multi- sentence answer. What is the evidence of a chemical change?

Think…..p 31 Copy the following chemical equations into your notebook 1. H 2 O (l)  H 2 O (g) 2. CH 4 + 2O 2  CO 2 + 2H 2 O What are the similarities and differences you notice?

Warm Up 1. H 2 O (l)  H 2 O (g) Same molecule on each side of the equation One side has liquid water, the other side has gaseous water This is a physical change….no bonds broken 2.CH 4 + 2O 2  CO 2 + 2H 2 O Same elements on each side of the equation Different compounds on each side of the equation There have been chemical bonds broken, atoms rearranged, & new bonds created

Objective TLW explain chemical changes by observing and making connections for several experimental trials then complete an exit ticket.

Lab Social Skill Card Social skill: on task Group Roles Leader: runs directions, on task Materials: collects materials Clean Up: monitors station & sink area Data: data table is properly completed by all group members You should rotate roles after each investigation. Part of lab grade will be how detailed your observations are.

Investigation 1 Send your materials member to the front with a Ziploc bag for the citric acid. Using the plastic spoon, place about ½ teaspoon of baking soda into the plastic bag that also contains the citric acid. Using your graduated cylinder, measure 10 mL of water. Add 10 mL of water to the plastic bag containing the citric acid and baking soda. Close the bag & mix the contents. Observe and record any changes that occur. Send your clean up member to the front with the baggie and its contents.

Investigation 2 Send your materials member to the front for the hydrogen peroxide. Pour the H 2 O 2 (hydrogen peroxide) into an empty baggie. Raise your hand to signal you are ready for the next reactant. Wait for an assistant to add a scoop of yeast to the baggie containing the H 2 O 2 (hydrogen peroxide). Quickly seal the baggie. Observe and record any changes that occur Send your cleanup member to the front with empty beaker and the baggie and its contents.

Investigation 3 Using your plastic spoon, measure approximately ½ teaspoon of baking soda. Place the baking soda into an empty baggie. Use the graduated cylinder to measure 10mL of vinegar. Add 10 mL of vinegar to the baking soda in the baggie and quickly seal. Observe and record any changes that occur Send your clean up member to your designated sink to empty and rinse GRADUATED CYLINDER, throw the baggie away in the front.

Investigation 4 Send your materials member to the front to obtain your cabbage juice and Mystery Tubes. Use the eyedropper to add about 20 drops of cabbage juice to Mystery Tube A. Observe and record all changes that occur in Mystery Tube A. Place the test tube in the beaker so it doesn’t spill. Use the eyedropper to add about 20 drops of cabbage juice into Mystery Tube B. Observe and record all changes that occur in Mystery Tube B. Place the test tube in the beaker so it doesn’t spill. Send your materials member to the front to return the cabbage juice. DO NOT CLEAN UP YOUR TEST TUBES, YOU NEED THEM FOR THE NEXT INVESTIGATION!!

Investigation 5 You will be using both your Mystery Tubes from investigation 4 Holding the tubes over the LARGE beaker in your bin, pour the contents of one tube into the other tube. Observe and record all changes that occur Send your clean up person to your assigned sink to empty and clean the test tubes. When you table and materials are clean, send your clean up member to the goggle cabinet to return your goggles.

In your CLEAN tray…. 3 baggies Large beaker 2 test tubes Water bottle Vinegar bottle Baking soda jar Plastic spoon Graduated cylinder 2 droppers Blank lab skill card Lab Directions Group role helper slips Paper towels Goggles into cabinet