       We conducted fair tests on cress seeds to determine the conditions needed for germination and growth and here are the results from the East Wall jury:
Results: The seeds were examined after 14 days. 1) Seeds grown in light: These were the healthiest looking of all, with dark green petals and greenish-white stems. 2) Seeds kept in the dark: These had yellow petals and white stems. 3) Seedlings kept in the dark and grown with plant food contained in the tissue paper: These seeds failed to germinate. They were still brown in colour and were soft. Some of them had mould on them. Our class have been given a mission: to design and make a device/apparatus to protect their egg from breaking when thrown from a height of 40m. Each group will have a slideshow showing their design and rationale. We'll publish these soon! Note from Teacher: Some brilliant ideas so far, very creative, but.... will they work?? We'll find out on Wednesday!! In November, we visited Marino Library for a workshop on animal skulls and bones and we learned lots of fascinating things. Click the video below to find out more!!
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.            We've spent the last week learning all about electricity. We conducted experiments on static electricity and discovered we are electric!!! We made a human circuit and then made simple circuits using batteries, wires and a bulb, We also made series circuits and switches. We tested materials to see if they were conductors or insulators and next week we are going to design and make: steady hand games, quizboards, lighthouses and rainbow spinners. We'll post the pictures as soon as we can!            |
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