# Water Molecules

Good Essays
838 Words
Grammar
Plagiarism
Writing
Score
Water Molecules
BCR: Which Towel?
A student asks a testable question: “Which brand of paper towel absorbs the greatest volume of water?” Design an investigation to provide an answer for the student.
Be sure to include • the materials needed. • a numbered procedure. • the independent and dependent variables. • important data that will answer the question. • ways to help ensure the accuracy of the results.
Materials: Several paper towels, a flat dish, bottled water, a thermometer, a tong, a ruler, and an scale,

Procedure:
(1) Weigh the sick + water
(2) Measure each sample of paper towel to be tested to assure a common size and weight.
(3) Measure the temperature of the water.
(4) Add the towel sample to the water for a period of time using a consistent method.
(5) Remove the sample from the water with a tong and allow excess water to leave the sample.
(6) Measure the weight of both the wet paper towel sample and the flat dish
Independent and Dependent Variables:
The dependent variable is the water absorbing capacity of the paper samples, and the independent variable is the weight of water captured by each paper sample.
Important Data: The weight of the water trapped by each paper sample.
Ways to Ensure Accuracy: Each measurement should be checked for accuracy at least twice by one or more observers, and each paper towel brand should be tested 2-3 times, using new paper samples each trial.

BCR: The Balloon
A balloon is placed over an empty flask. The flask is heated on a hot plate and then cooled in a container of ice water. The effect on the balloon is shown in the diagram below:

[pic]
Explain this observation based on the Kinetic Molecular Theory.
In your response, be sure to • describe the effect of temperature on the kinetic energy of the gas particles. • describe the motion of the gas particles. • describe the effects of this change on the pressure and volume of the gas sample.
When temperature

## You May Also Find These Documents Helpful

• Satisfactory Essays

The aim of this experiment is to see which brand of paper towel absorbs the most water out of a 200mL beaker.…

• 516 Words
• 3 Pages
Satisfactory Essays
• Good Essays

2. Get a paper towel, fold it, and wet it with 15 ml of water and put it into petri dish C.…

• 769 Words
• 4 Pages
Good Essays
• Satisfactory Essays

Rembac states that paper towels are porous and permeable, which means they have small spaces that liquid and air can pass through, and liquid is able to rise through a property of water called cohesion. In this paper towel experiment, Rembac will be testing which brand of paper towel has the highest rate of capillarity, or ability to absorb water into its many spaces. Rembac`s procedure cut out 3x8 inches of each different brands of paper towel and observe any differences in the paper towels and take note. Then she fills each beaker half was and dips the strips of paper towels about an inch in the water and uses a marker to see how far up the water was absorbed on the strip, and repeats 4 to 6 times with each brand. (Rembac,…

• 504 Words
• 3 Pages
Satisfactory Essays
• Good Essays

I will use 20 paper towels (4 different brands, 5 of each brand) folded in half four times each, 4 identical measuring cups that measure up to 150 ml. (one for each brand of paper towel), 1 timer, 1 notepad, 1pencil, and room temperature water.…

• 1179 Words
• 5 Pages
Good Essays
• Good Essays

Scientific Principles- Since paper towels are used to pick up liquids, the volume of liquid it can hold is important. The amount of liquid a towel can absorb can be measured by the volume of liquid it picks up.…

• 1499 Words
• 6 Pages
Good Essays
• Good Essays

In the experiment with just tap water it included one hundred milliliters of tap water. Then fifty more milliliters of water. Water was added with an eyedropper until the surface appears to be rounded or about to pour over. Then, the paper clips are dropped in the water until the water spills over. In the second experiment with soapy water it uses one hundred milliliters of water. Then, forty-eight more milliliters of water. Water is also added with an eyedropper until the surface appears to be rounded. Add paper clips until it spills over. Then record the results.…

• 648 Words
• 3 Pages
Good Essays
• Good Essays

4. Add weights one by one to the middle of the paper towel until it breaks.…

• 572 Words
• 3 Pages
Good Essays
• Good Essays

5. Rinse all of the test tubes (three with steel wool and three without) by filling the test tubes with water, allowing the water to sit…

• 1139 Words
• 5 Pages
Good Essays
• Better Essays

Experiment: See lab sheet. In this experiment there was no control. The independent variables in this experiment are the time, and the amount of sand and water put into the cans. The dependent variable is the degrees (in Celsius) that air, water, and sand get to. The time, and amount of sand and water is the independent variable because it does not have to rely on anything. The degrees (in Celsius) that air, water, and sand get to is the dependent variable because it relies on the time and amount of sand and water (put into the cans).…

• 969 Words
• 4 Pages
Better Essays
• Good Essays

6. Allow the sample to cool for at least 3 minutes and then mass the dish and remaining sample and…

• 807 Words
• 4 Pages
Good Essays
• Satisfactory Essays

7) Put thumb on top and shake each test tube well so everything is dissolved…

• 542 Words
• 3 Pages
Satisfactory Essays
• Good Essays

6. If there is time, concentrate the solution by evaporating a little of the water off over a Bunsen burner (slowly).…

• 356 Words
• 2 Pages
Good Essays
• Satisfactory Essays

1. Measure in cm the radius of each the petri dish, test tube, graduated cylinder, and two beakers. Calculate the area of each.…

• 344 Words
• 2 Pages
Satisfactory Essays
• Powerful Essays

4) Cut a second piece of paper into a 10-cm square. Weigh and record its mass and set it aside.…

• 1268 Words
• 6 Pages
Powerful Essays
• Satisfactory Essays

Equipment: 2 thermometers and beakers, hot water (to put inside of the beaker), tap water (to wet the cotton), pen, paper, ruler and a rubber (this is for your graph and data)…

• 325 Words
• 2 Pages
Satisfactory Essays