Physical and Chemical Changes Lab                                                Name

                                                                                Date                                

  1. Define the following words:

Physical change –

Chemical change –

  1. Directions:

Station

Observations & Data

Physical or Chemical Change? Explain.

Answer the questions below if you finish early at a station OR complete them for homework.

What is a property?

What is a change?

What are some properties of matter?

What are some of the ways matter can change?

How do you know these changes have occurred?

What is the difference between a physical and chemical property?

What is the difference between a physical and chemical change?


Station 1 – Baking Soda and Vinegar

  1. Pour 20 mL of vinegar into the beaker.

  1. Measure the temperature of the vinegar and record this temperature on your sheet.

  1. Measure one tablespoon of baking soda and place it into the beaker with the 20 mL of vinegar. Stir gently.

  1. Observe any changes that occur.

  1. Record observations on your sheet.

  1. Measure the temperature of the vinegar and baking soda mixture and record this temperature on your sheet.

  1. Explain why this was a physical or chemical change on your lab sheet.

  1. Pour your mixture into the sink and rinse out beaker.

  1. Wipe any spills on your table and clean your station.


Station 2 – Sugar (C6H12O6) and Salt (NaCl)

  1. Mix one teaspoon each of sugar and salt in the dish.

  1. Stir them gently together so that they are thoroughly mixed.

  1. Is this a physical or chemical change? Explain.

  1. Write out a method you could use to test to see if this was a physical or chemical change.

  1. Use the magnifying glass to examine your mixture.

  1. Record observations on your sheet.

  1. Compare the crystals you see with some of the original sugar and salt containers.

  1. Record observations on your sheet.

  1. Wipe any spills on your table and clean your station.

Station 3 – Melting Ice

  1. Observe the ice in the clear cup.

  1. Record observations on your sheet.

  1. Write out a method you could use to test to see if this was a physical or chemical change.

  1. Is this a physical or chemical change? Explain.

  1. Record observations on your sheet.

  1. Wipe any spills on your table and clean your station.


Station 4 – Hydrogen Peroxide and Activated Yeast

  1. Pour 20 mL of hydrogen peroxide into the beaker.

  1. Measure the temperature of the hydrogen peroxide and record this temperature on your sheet.

  1. Record observations on your sheet.

  1. Pour the small container of activated yeast into the hydrogen peroxide in the beaker.

  1. Record observations on your sheet.

  1. Measure the temperature of the hydrogen peroxide and activated yeast and record this temperature on your sheet.

  1. Is this a physical or chemical change? Explain.

  1. Record observations on your sheet.

  1. Pour the used hydrogen peroxide and yeast into the designated receptacle labeled, “Waste”.

  1. Rinse beaker and thermometer in the sink.

  1. Wipe any spills on your table and clean your station.

Station 5 – Baking Soda and Water

  1. Pour 30 mL of water into the beaker.

  1. Measure the temperature of the water and record this temperature on your sheet.

  1. Measure one tablespoon of baking soda and place it into the beaker with the 30 mL of water. Stir gently.

  1. Observe any changes that occur.

  1. Record observations on your sheet.

  1. Measure the temperature of the water and baking soda mixture and record this temperature on your sheet.

  1. Explain why this was a physical or chemical change on your lab sheet.

  1. Pour your mixture into the sink and rinse out beaker.

  1. Wipe any spills on your table and clean your station.

Station 6 – Tarnished Pennies

  1. Take a tarnished penny and place five drops of lemon juice on it.

  1. Let the lemon juice sit on the penny for 3 minutes.

  1. Record observations on your sheet of the penny before you added the lemon juice.

  1. After the three minutes, rub the penny gently with a towel.

  1. Explain why this was a physical or chemical change on your lab sheet.

  1. Can you reverse this process?

  1. Place the used pennies into the container labeled “Used Pennies”.

  1. Wipe any spills on your table and clean your station.


Station 7 – Effervescing Tablets

  1. Fill the small beaker about 60 mL full of water from the sink.

  1. Measure the temperature of the water and record this temperature on your sheet.

  1. Drop in one of the tablets and observe what happens.

  1. Record your observations.

  1. Measure the temperature of the water and tablet mixture and record this temperature on your sheet.

  1. Explain why this was a physical or chemical change on your lab sheet.

  1. Can you reverse this process?

  1. Pour used water into the “Waste” container.

  1. Rinse out the small beaker in the sink.

  1. Wipe any spills on your table and clean your station.

Station 8 – Dissolving Sugar

  1. Fill the small beaker about half full of water from the sink.

  1. Measure the temperature of the water and record this temperature on your sheet.

  1. Put one teaspoon of sugar in it and stir gently.

  1. Record your observations.

  1. Measure the temperature of the water and sugar mixture and record this temperature on your sheet.

  1. Explain why this was a physical or chemical change on your lab sheet.

  1. Pour used water into the sink.

  1. Rinse out the small beaker in the sink.

  1. Wipe any spills on your table and clean your station.

Station 9 – Water and Calcium Chloride

  1. Fill the small beaker with  of water from the sink.

  1. Measure the temperature of the water and record this temperature on your sheet.

  1. Put one teaspoon of sugar in it and stir gently.

  1. Record your observations.

  1. Measure the temperature of the water and sugar mixture and record this temperature on your sheet.

  1. Explain why this was a physical or chemical change on your lab sheet.

  1. Pour used water into the sink.

  1. Rinse out the small beaker in the sink.

  1. Wipe any spills on your table and clean your station.