CHANGING MATTER

WARM-UP (7 MIN)

In your notebook, always include the date, the lesson title, and do the warm-up task associated to that date. 

Task:  *Complete the Musical Warm-Up:  "What is that?"*

WARM-UP DISCUSSION (3 MIN)

*What is the difference between cooking an egg and breaking an egg?*

LAB:  *LET'S CRUSH FIZZ WAFT* (30 MIN)

In your notebook, always include the date, the lesson title, and do the warm-up task associated to that date.  FOR LABS, IF NO SHEET IS PROVIDED, YOU MUST RECORD STEP TITLES AND YOUR ANSWERS IN YOUR SCIENCE NOTEBOOK 

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LAB OBSERVATION SHEET

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Purpose:  To give students an understanding of physical and chemical changes by actively exploring a few items.

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Materials: 

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• 250 mL beaker

• Eye dropper

• Two small pieces of tin foil

• One piece of dry sponge

• One sugar cube

• One magnifying glass

• One CaCO3 tablet

• One Petri dish

• One mortar and pestle

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Procedure:  Using the materials above, complete each of the following tests in order. As you conduct each test, fill out the observation chart.

1. STEP 1:  Dry sponge in water

   1. Fill your beaker with 100 mL of tap water.

   2. Place the piece of dry sponge on the Petri dish. Use the magnifying glass to observe its physical properties.

   3. Use the eye dropper to add 10 drops of water to the sponge.

   4. Use the magnifying glass to observe whether any of the properties have changed. Record your observations on the chart.

   5. Dry the Petri dish well with a paper towel.

2. STEP 2:  Sugar cube

   1. Place the sugar cube on the Petri dish. Using the magnifying glass, observe its physical properties (size, shape, texture, color, etc.)

   2. Use the mortar and pestle to crush the sugar cube until it cannot be crushed further. Return the sugar to the Petri dish.

   3. Use the magnifying glass to observe whether any of the properties have changed. Record your observations on the chart.

   4. Carefully transfer the sugar to one of the pieces of tinfoil.

3. STEP 3:  CaCO3 in Water

   1. Fill the beaker with 200 mL of water.

   2. Use the magnifying glass to observe the CaCO3 tablet carefully.

   3. Drop the tablet into the water. Observe. Record your observations on the chart.

   4. Empty the beaker into the sink and rinse well before returning it to your basket.

4. STEP 4:  Water in foil

   1. Shape one of the pieces of tinfoil into a shallow bowl with raised edges.

   2. Using the eye dropper, drop 6 drops of water into the foil. Examine the water’s physical properties.

   3. Carefully carry the foil bowl containing the water to the flame station.

   4. Observe as your teacher heats the water. Record your observations on the chart.

5. STEP 5:  Sugar in foil

   1. Shape the second piece of tinfoil into a shallow bowl shape with raised edges.

   2. Place a pinch of crushed sugar from the Petri dish into the tinfoil bowl.

   3. Carefully carry the foil bowl containing the sugar to the flame station.

   4. Observe as your teacher heats the sugar. Record your observations on the chart.

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Now that you have finished with all of the tests, please clean up your space:

__ Empty the beaker into the sink

__ Rinse and dry the mortar and pestle

__ Rinse and dry the Petri dish

__ Throw away the tin foil
__  Return the wet sponge to your teacher

__ Place all equipment neatly in the basket

__ Return the basket to the supply table

THE NOTES:  DAY 1 VOCABULARY (5 MIN)

*Write these down in your notebooks!*

Physical change - any change that alters the form or appearance of matter but does not make any substance in the matter into a different substance.

Chemical change - a change in matter that produces one or more new substances.

Law of conservation of mass - the fact that matter is not created nor destroyed in any chemical or physical change.

EVALUATION (5 MIN)

We'll wrap it up here with today's assessment in your learning management system.  Feel free to study your notes and/or the videos below.  We always recommend viewing the videos the night before the lesson.