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We have some talented musicians in our class! Have a listen to two of our students' guitar playing!
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Materials:
Petri dish Pipette Food colouring Washing up liquid Cotton bud Milk Method: Step 1: Pour milk in to petri dish Step 2: Use pipette to drop food colouring on to the surface Step 3: Dip cotton bud in to washing up liquid Step 4: Dip cotton bud in to petri dish and observe Today we looked at surface tension and found out that water has a skin! The proper scientific name for this is a meniscus! We had to predict how many drops of water could fit on a 10c coin and most groups predicted 3 or 4 but we were way off! Most groups managed at least 15 drops but one group got 28!!  Leon, Jake and Dean's coin!! Starch supplies the body with long lasting energy in the form of glucose. Starch is found in potatoes, wheat, beans and other foods. Light from the sun is a source of energy used by plants in a process called photosynthesis. This energy, in the form of starch, is stored in the plants. Inside the leaves of the plants are chloroplasts (this is where photosynthesis occurs). Chlorophyll, the substance found in the chloroplasts, attracts sunlight and starts the process of photosynthesis. This process converts carbon dioxide from the air and water from the ground and combines with light to create oxygen and starch. We used an iodine solution to test a range of foods for the presence of starch. We used pipettes to drop the solution on to the foodstuffs. The iodine will turn black if starch is present. We also tested papers and tissues and noticed that stiffer paper contained more starch than the tissue paper.            |
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