Bouncy Ball and Slime Lab

SNC 2D Bouncy Ball and Slime Lab

Procedure:

Part 1: Bouncy Ball

1. Set up your workstation at your lab bench with a beaker, graduated cylinder, metre stick, and stirring rod. 2. Measure 15 mL of white glue into your beaker with a measuring spoon (do not use a graduated cylinder for this!) 3. Add 1 drop of food colouring, and mix well using the stirring rod. 4. Measure 15 mL of borax solution into a graduated cylinder, and add it to the glue solution in the beaker. Stir well. 5. Once the solution becomes a solid clump, remove it and knead it in your hands. If it is still sticky, put it back in the beaker and add more borax solution. 6. Roll it into a ball with your hands – it should have some bounce to it. 7. Working with a partner, hold a metre stick upright on the lab bench. 8. Drop your ball from the top of the metre stick and record the height of the bounce (use the inch markings since they are easier to read quickly). 9. Complete 5 drops, and record the data in a table. 10. Calculate the average height for the 5 bounces of your ball, and collect the average from all other groups as well. Record this data in a table. 11. Create a histogram/bar graph showing the average bounce height for each group. 12. Complete any additional questions on the following pages.

Part 2: Slime

1. Add 15 mL of white glue to a beaker with a measuring spoon. 2. Add 1 drop of food colouring, and mix well using the stirring rod. 3. Add 30 mL of water, and stir well. 4. Add 30 mL of borax solution, and stir well. 5. Take the clump of solid material and knead it in your hands.

Lab Report:

Each student must generate their own lab report to be handed in. It should include: i. Title page ii. Data and observations (charts and graph) iii. Answers to discussion questions

Marks:  Title page (1 mark)  Data and observations (chart #1 – 3 marks; chart #2 – 2 marks; average calculation – 2 marks; chart 3 – 2 marks)  Graph (5 marks: title – 1 mark; axes labeled with units – 2 marks; bars – 2 marks)  Questions (#1 – 1 mark; #2 – 2 marks; #3 – 1 mark; #4 – 2 marks; #5 – 2 marks; #6 – 2 marks)

Observation Chart #1: Reactants and Products

For each cell, make at least 2 qualitative observations and 1 quantitative observation.

Observations of Glue + Borax Observations of Glue Observations of Borax Solution Solution

Observation Chart #2: Bounce Heights for Your Group

Bounce Trial # Height of Bounce (inches)

The average bounce height from my trials is ______(show all calculations below!) Observation Chart #3: Bounce Data for All Groups

Average Bounce Height Name: (inches)

On a piece of graph paper or using a computer, create a properly labeled histogram/bar graph showing the average bounce height of each group.

Questions:

1. Which group’s ball had the highest bounce? 2. Was it easier to determine this from the graph or the chart? Why? 3. How does the bounce of your ball compare to the bounces for other members of the class? 4. Create an observation chart to compare the ball to the slime. 5. Is the slime a solid or a liquid? Give your opinion based on your previous knowledge (hint: look up the definition of a solid and a liquid). 6. What did you learn from this lab?