Chanda

Week 5 21 May 09 This week in Science I learned about pH. pH stands for percent Hidrogen ions. I also learned that window cleaner is a base. Milk is a weak acid as indicated by the yellow color on the pH strip. Baking soda is also a base with a pH level of 8.0. I also leared that lemon juice is a very strong acid indicated by the red tint to the pH strip and the pH level of 2.0.I also learned that pH paper is very sensitive. It can react to the oils and acids in and on our skin! In conclusion pH very important if you want to work i a science lab, as a mechanic, or janitor, or even a science teacher.

Week 4 30 April 09 This week in science I learned about biomes. Biomes are a bunch of ecosystems put together. A couple of common biomes are tundra, polar ice, tropical forest, and desert. Another common biome is deciduous forest. Biomes are important because they change over time and affect all life forms. Biomes are important part of life because they support what lives there and what lives around them. As anyone can see biomes are an important part of life.

Week 3 17 April 09 This week in science I learned about food chains and food webs. A food chain show part of a food web and is less complicated. Food webs show all organisms in an ecosystem and how they interact. Food chains are mostly made of a producer a primary consumer, a secondary consumer, a top consumer and bacteria. Omnivores eat both plants and animals. Carnivores eat other consumers. Herbivores eat plants only. A producer is an organism that makes its own food. A consumer eats other organisms to get energy. Decomposers break down dead organisms and put the elements in their simplest form to get energy.

Week 2 9 April 09 1. This week in science we learned about organelles. The mitochondria turns simple sugars into ATP or energy for the cell. The lysosome is like a scrapyard and get rid of foreign invaders and worn out organelles. Ribosomes make protiens for the cell. The golgi complex pacages protiens in ribosomes to be transported out of the cell. The ER or endoplasmic reticulum move protiens and fibers throught the cell. Microtubles help the cell seperate into two cells. The nucleus protects the Dna. The nucleoulus makes ribosomes. The cell membrane protects the cell. All organelles are covered by a membrane. 2. We also leaned about the differences between animal cells and plant cells. Plant cells have a cell wall unlike animal cells. They also have chloroplast. Some animal cells have flagella which help them move. They have lysosomes which plant cells do not have.

Week 1 19 Mar. 09 1. This week in science I learned about Eukaryotes. I learned that humans are eucaryotes because we are made of eucaryotic cells. Eucaryotes are cells with a nucleus. Procaryotes do not have a nucleus. Most eukaryotic organism are multicelled. Most eukaryotic mammal skin cells do not have cell walls. Eukaryotic cells are normally bigger than single celled organisms. The mitochondria processes sugars into simple sugars and eventualy energy for the cell. Deoxyribo Nucleic Acid or DNA controls the cell and what it dose. The nucleus protects the DNA. Vacuoles hold and carry the water supply for the cell. 2. This week we also learned about Prokaryotes. Prokaryotes have cell walls and do not have a nucleus. Prokayotes are most commonly bacteria. One type of prokaryotic bacteria is archebacteria. Archebacteria loves heat and salt and produces methane.

Hi my name is Chanda Today I learned how to upload a picture to wikispaces, I also learned how to change fonts and colors. One question I have about wikispaces is how do you create and name a wikipage?