3rd+Grade+Chemistry

= 3rd Grade Chemistry = Great link for the [|Periodic Table for Kid]

**Guiding concept:** // Students will develop Understandings about scientific inquiry and the ability to conduct inquiry. //

**Standard ** **GLE 0307.Inq.1** Explore different scientific phenomena by asking questions, making logical predictions, planning investigations, and recording data.  **GLE 0307.9.1** Design a simple experiment to determine how the physical properties of matter can change over time and under different conditions.

Students will review the states of matter concepts learned previously. At the conclusion of this activity students should be able to explain how this experiment was designed.

Teachers may use [|Brainpop] in their classrooms to remind students of the states of matter and introduce a discussion of physical change vs. chemical change.

[|Make your own "Radioactive" Slime] Here is more [|advanced information] for your teacher about slime. This is more like what real scientists do when experiementing with materials to learn about them. Be ready to record your observations. [|This recipe is easier to understand]-- but doesn't have the formulas. The following information is modified from the website on tripod which cannot be accessed at school- http://members.tripod.com/sharing_science/slime.html > Gases and liquids are classified as fluids because both are able to flow and to change their shapes. [|Sir Isaac Newton] (1642-1727) is credited with stating the relationship between temperature and the [|viscosity] of fluids. This law of Viscosity states that only a change in temperature affects the viscosity of a fluid. Newton had never seen **"slime"**, a creepy ooze that, like other fluids, has an increase in molecular motion with an increase in temperature but that, unlike other fluids, has its viscosity increase with an increase in pressure. Pressure makes it behave as a solid. Since **"slime"** defies Newtonian Law's about fluids, it is considered a "non-Newtonian" fluid. Here is some [|grown-up information about Sir Isaac.] > Follow these instructions to make slime -**It is not edible.** > Try the following experiments with Slime: > **Note:** the slime will keep for weeks in a plastic bag, but after a lot of handling it will eventually dry out. > The use of polyvinyl alcohol solutions is what has been predominately used in the preparation of most slimes, especially those that have been used for specialty toys and items for children. Upon the drying of polyvinyl alcohol solutions, they will leave a thin film of plastic that is finding its use in packaging materials. This film, is left in the environment and will break down rather than persist as some plastics do, thus it requires no clean up. The following is a way that you can produce slime with the use of polyvinyl alcohol and Borax: With the polyvinyl alcohol solution that I've mixed up, pour 25 mL into a 100 mL beaker or paper/plastic cup. Add one or two drops of food coloring to the polyvinyl alcohol solution in your cup. While stirring the mixture, pour 5 mL or the Borax solution that I have also prepared for the class. Stir well and continuously for approximately 2 minutes. Now remove the material from the cup and knead it in your hands. The material will become firm and lose some of its stickiness in a few minutes. > **Test the properties of "Slime"** Pull the Slime slowly. What happens? Pull the Slime hard. What happens? Roll a piece of Slime into a ball and drop it. What happens? Place a small piece of Slime on the table top. Hit it with your hand. What happens? Write your name on a piece of paper with a felt-tip pen. Place the Slime on your name, then lift it up. Did anything happen? Can you explain why? Repeat the procedure with different brands of felt-tip pens. Store the Slime in a plastic bag.
 * ·Combine 4 ounces (120 mL) of Elmer's school glue, 4 ounces (120 mL) of distilled water,
 * and ten drops of green food coloring. Stir well and set aside.
 * ·In a separate bowl, combine 1 teaspoon (5 mL) of sodium borax with 1 cup (250 mL) of distilled water. Stir well.
 * ·Pour both solutions into an empty bowl simultaneously.
 * ·Stir and dip the thick Glob out of the bowl
 * ·Knead the Glob with your hands until it is smooth and dry.
 * ·Roll it into a ball and bounce it on a smooth surface
 * ·Hold it in your hands and quickly pull the ends in opposite directions
 * ·Hold it in your hands and slowly pull the ends in opposite directions
 * ·Place a lemon-size piece into a microwave dish and heat for one half minute in the oven.
 * Caution this will make the Glob too hot to handle. Allow it to stand in the oven for about 5
 * minutes so that it returns to room temperature.
 * ·Place a piece in a freezer overnight and then allow it to return to room temperature.