Separating A Mixture

In our lab, we had to separate the materials given into seven groups, we also had to write a procedure (steps). Step 1, is to separate the toothpicks, beans, spider, and water from plastic cups onto your tray. Step 2, is to boil the sand, salt, and water in the beaker on the hot plate. Step 3, is to remove the beaker from the hot plate and to filter the sand, salt, iron filling from the water into the plastic cup. Step 4, is to place the magnet into the plastic cup to separate iron fillings from sand and salt. Step 5, is to place them into the seven possible groups, you should get 1.water, 2.beans, 3.spider,4. toothpicks , 5.salt, 6.sand, 7.iron fillings.

Respirtory System

http://goanimate.com/movie/0LeWG4P1bQXo?utm_source=linkshare

Chicken Wing Anatomy Lab

                In our Lab Today we discussed and watched the dissection of a chicken wing. The purpose was to observe the dissection to learn and identify the different types of tissue and organs. We also had to pay attention of what color each item was, like the skin, muscle, ligament, and cartilage. We didn't find a nerve while we watched. In the lab the tissue that actually moved the chicken wing was the muscle. The role of the epithelial is to keep the muscle, cartilage, and ligaments protected. Also, the chicken wings are similar to human arms because in both the muscles allows the arm or wing to move. There different because in human bones the longer and there is more cartilage, in chicken wings the bones are shorter and there is less cartilage.

Angry Birds Cinematic Trailer

http://www.youtube.com/watch?v=1Bk_nqUQ0fc

Diffusion Lab Essay

Diffusion Essay

In Class we have been talking about diffusion and osmosis, and later we did a lab. The purpose of the lab was to see if we understood diffusion and osmosis. The definition of diffusion is the process by which molecules from an area of lower concentration. Therefore the definition of osmosis is diffusion of water molecules (H2O) though a selectivity semi permeable membrane. In the lab we had to put starch into a bag which represents organelles, and the bag represents the semi permeable cell membrane. Then we filled a beaker half way with water, and the added two or three drops of Iodine. The iodine represents an indicator and nutrients for the cell. The Iodine is hypertonic so it dilutes into the bag of starch. Soon the water becomes hypotonic, and the concentration is now isotonic.  Our prediction was that the iodine would turn the starch purple.

My analysis of the lab is that for most of the experiments you have to wait a little longer for the starch to dilute the baggie. But after a while the starch inside the baggie turns a purple color. Sometimes for this project to work you have to have the right materials and the right brand of baggies. The problem with ours is that we didn’t have the right kind or brand of plastic baggies. In the procedure you are required to add starch to a baggie, add water and iodine into a beaker, and place closed baggie into beaker and watch how diffusion and osmosis works.

Also, some examples of diffusions and osmosis in life are in some restaurants sliced potatoes are soaked in water before they are fried. Also, Diffusion of gas particles enables smell, so flowers/fruit can attract animals/insects by scent leading to fertilization or dispersion of seed particles. Also, Osmosis is used in plants, and growing crops. Finally, diffusion is responsible for the movement of oxygen from carrying red blood cells to different cells. Osmosis carries nutrients from the circulatory system into the cells and water also is responsible for carrying dissolved wastes away from the cells.

Diffusion Lab Response

Our lab today involved us learning about diffusion and osmosis. Our assignment was to put a teaspoon of corn starch in a baggie with water. Then we had to fill a beaker half way with water, and then add the iodine. After 15 minutes the iodine is supposed to make the corn starch turn the same color as the solution or turn purple. For our group, ours worked partly. Only the bottom of the corn starch turned purple. Most of the time this should work. (Iodine can stain clothes and hair, please wear goggle and tie hair back if going this project)

Triassic Crocodile Cousin Walked

 picture from Google

First described over a century ago, Poposaurus is a “rauisuchian,” part of an extinct lineage of reptiles whose diverse array of members included the precursors of crocodiles and their closest relatives. Rauisuchians differed from crocodiles as we know them today in holding their limbs upright beneath their bodies rather than out to the side. This arrangement made them more efficient at walking and running on land, and, until recently, all rauisuchians were thought to have walked on all fours. The newly described Poposaurus was found in the Triassic Chinle Formation of southern Utah’s Grand Staircase-Escalante National Monument. The fossil included most of the postcranial skeleton from midway down the neck to the tip of the tail, stretching about 4.5 meters in all. According to the new research, the anatomy of the creature’s pelvis and hind limbs shows that Poposaurus walked upright, planting its feet close to the midline of its body. In fact, the hip anatomy would have made it impossible for Poposaurus to sprawl its limbs out to the side, like living crocodiles, although the exact way the rauisuchian’s feet touched the ground is unclear. Poposaurus may have stood on tiptoe, walked with the whole foot touching the ground, or it might have alternated between both foot postures depending on how fast it was moving.

 Article from http://news.sciencemag.org/sciencenow/2011/05/triassic-crocodile-cousin-walked.html?rss=1  

Lab Report: Soaring Staws

Soaring Straws

  In this lab, we had to figure out how the gravitational potential energy of a straw rocket depending on the elastic potential energy of the rubber band launcher. The relationship of the G.P.E (gravitational potential energy) and the E.P.E. (elastic potential energy) is the more the straw stretches, the E.P.E increases which means the straw will go higher than usual. Also, the amount of stretch is the manipulated variable and the responding variable is the height of the trials, which means the amount of stretch is related to the E.P.E. (elastic potential energy). When the rocket takes off it has K.E. (kinetic energy), and the G.P.E and the E.P.E. are now converted to kinetic energy.

            The possible errors that might have occurred are the data could have been typed in the calculator incorrectly. Also, the amount of stretch could have been miscalculated. Another possibility is that the data for the plot could be incorrect.

Lit Poems

Diamante Poem

Wool Pooh

Evil, scary

Frightening, terrifying, horrifying

Destructive, horrendous, calm delightful

Encouraging, soothing, comforting

Kind, friendly

Winnie the Pooh

Character Poem

Kenny's Adventure

Kenny

Intelligent, achiever, frightened

Who loves his family

Who feels terrifified about Joey's fate

Who needs love from his brother

Who shares the Brown Bomber

Who'd like to see Grandma Sands again

Who dreams of the Wool Pooh

Who ends up saving Joey's life