Science week review

On Monday, we had a two homework questions. One of them was can a plant live under water? They can because there are water molecules, oxygen molecules, and carbon dioxide molecules. They also enough food stored to live for a little while.

On Tuesday we learned about the different molecules in the water. We also learned about why plants are so amazing. This is because they can recycle their own waste. We also learned about how photosynthesis relates to respiration. The chloroplasts take in H2O, CO2, and sunlight (energy). These are the reactants. It gives off sugar and oxygen which go into the mitochondria. The mitochondria gives off CO2, energy, and H2O. These are the products. The reactants are the things that you start off with and they are the beginning off a process. The products are the things that you end up with which are created in the process. Without plants, we wouldn't have energy. Plants take in the sun and convert it into energy. We eat animals that eat plants. All of this shows why plants are so amazing.

On Wednesday, we learned about why fish can't breathe under water. This is because behind their gills, they have a grid sort of thing that keeps water out, but lets oxygen come in that was absorbed under the water. They can't breath above water, because there is too much oxygen and other chemicals like Co2 that can go through their gills. This shows how our lungs are different than a fishes. We also learned about the energy pyramid. There are four sections on it. The plant-autotroph section which is the biggest, the primary consumer section, the secondary consumer section, and the tertiary consumer section, which is the smallest. Each section has a sertain amount of Jules of energy. Each time that you go up a section, it transfer 10% of the Jules of energy. The plants-autotrophs have 1500 Jules of energy. Then it transfers 10% to the next section to make it 150 Jules of energy, and so on. This shows how energy is transferred to make their own food.

On Thursday we had a sub. we got in groups and did a paper on RNA. We also had to watch a computer simulations of how RNA is decoded. The messenger RNA is created to bind with the ribosomes to be decoded. They leave the nucleus and enter the cytoplasm to decode. When it is read , the amino acid is activated by an enzyme. After that, we went to another website to create RNA strands. We first had to decode the RNA letters. Then we had to click and drag the correct codons to make an RNA strand. This shows how peoples genes are duplicated.

On Friday, we just took a quiz on photosynthesis.