For this project you will need two rubber bands, a balloon, modeling clay, clear plastic, plastic y-tube, adhesive tape, string, scissors, plastic bottle and two small ice bags. Cut out the plastic bottle bottom. Next, cut the ice bags to 2.5 centimeters in length and tie one ice bag to each end of the Y-tube using rubber bands. Insert the Y-tube through the small opening made at the center of the plastic bottle and hold it in place by using modeling clay and to prevent air from entering or leaving. Cut the balloon into two and use the part with the tip where you blow air into the balloon. Stretch the balloon sheet under the open bottom of the bottle holding it in place with rubber bands. Finally, tie a string at the middle of the stretched balloon sheet and pull the balloon to observe how the plastic bags attached to the Y-tube change in shape.
This experiment focuses how oxygen is given off during photosynthesis within plants. You will need a beaker, glass funnel, test tube, baking soda, water plants and water. Place the water plants into the beaker filled with water. Add a little baking soda and cover the plants with the glass funnel. Insert the funnel tip into the test tube. The bottom of the test tube should be sticking up out of the glass beaker. The stems of the plants should be pointed upwards, through the narrow end of the funnel. When exposed to sunlight, you will see a stream of small gas bubbles rise upwards through the cut ends of stems and collect at the upper end of the test-tube, displacing the water. Now move the experiment to a dark room and notice how the release of oxygen ceases.
This experiment will require you to get plastic disposable spoons, a clothespin, blindfold and various examples of items to taste such as sugary candy, savory spices and other diverse flavored food samples. The object of your experiment is simple; to determine how much affect does the nose and sense of smell have on taste buds. Have various volunteers take turns getting blindfolded. While your subjects are blindfolded, have them sample taste your items, first with the clothespin on their nose and the nonce without. Ask your subjects describe what they are tasting and record the findings. After you have tested several people, compare your notes and discuss how each person sense of taste was affected by clothespin on their nose and why.
You will need three slices of bread, tooth picks, tweezers, three plastic bags, magnifying glass, thermometer, lamp and a plastic container. Add one slice of bread to each of the plastic bags and seal them. Place one of the bags in a warm, dark place --- such as a cabinet near a stove. Place another bag in the refrigerator. Punch several holes in the lid of a clean, empty margarine container and lace the third bag in the margarine container and cover with the lid. Lay the container in a hot place --- under a lamp, for example. Be sure to note the temperature where each bag is located. Let each bag sit for a few weeks and check periodically. When enough mold develops, retrieve a sample of each and observe under a microscope or magnifying glass. Describe the differences in the molds and what may cause them to develop differently.