Category Archives: 9RI 2010

Why NOT to Shake a baby – Science Fair project – The effect of shaking on g force

We are shaking a baby to work out how much shaking can cause brain damage.

Bridge Building

Flowers

Today we looked at the flower of the fuchsia plant and the different parts of the flower such as the reproduction parts like the stigma and the stamen. After that we looked at how the flower reproduces and what pollinates the flower, eg. wind, insects etc.

Measuring Photosynthesis

Our aim today was to measure the effect of ligh intensity on photosynthesis. We set up a light system and put waterweed plants in a test tube upside down with water and sodium carbonate. Then we measured the distance from the test tube to the light and how many bubbles came from the plant in a minute. Then we changed the distance and repeated this. This shows effects on photosynthesis by light because plants produce oxygen when they perform photosynthesis, these are the bubbles.

Dean Experiencing The Magic Of Science

Agapanthas and puka leaf

Today in Mr Rileys awesome as science class we looked at agapanthus and puka leaves through microscopes. Our goal was too explain the structure of leaves. Through the microscope we were trying to look at a cross section in the leave too find the different cell layers, the cross layer, the epidermis, the palisade layer (where photosynthesis goes on) the spongy layer and the contracting and expanding Guard cells or toma which control the entry of c02 and exit of gases such as O2 and H2O.

Here were some questions we were asked afterwards about the plants.

What is a stoma? The stoma is the tiny hole to allow gases in and out the leaf.

What does the word stomata mean? The plural of stomata.

Why does a plant need a stomata? To exchange gases and allow photosynthesis to happen.

Starch Test

Today we did a starch test on Maple leaves. First we put the leaves in boiling water, then we put them in methelated spirits until they go white. Next, we put some iodine on them and if they turn black they have starch present.

Leaf with Starch, Meths it was boiled in

Potato plastic

We crushed potato in mortar and pestle, then washed out the starch and filtered it. We added some chemicals and boiled it to make potato plastic.

Bailey Bridge Engineering

Today in Mr Riley’s Science class we built miniature Bailey Bridges. Bailey Bridges are the bridges that the allied forces used in WW2 when the allied forces were retaking Europe and the Axis were destroying the bridges. They used bailey bridges because they were quick too build. We had 2 teams, each of half the class. The goal was to bridge the gap over two desks well enough for the smallest team member too walk over.

Here are some pictures of bailey bridges

viruses

today we are learning about viruses. we learn were viruses are found, what are viruses and how they reproduce. we also made a virus of of paper.