Marissa's PSC 103 blog

  Photo Blog #4 For my isostasy (buoyancy) experiment, I decided to test different objects in the same amount of laundry detergent. All of these experiments took place on Saturday, April 26 around 5 pm. First I did all types of coins, which all sank. This concludes that all of the coins have a higher density than the laundry detergent that they were in.       Then, I decided to test the buoyancy of a cotton ball in the same amount of laundry detergent. The cotton ball barely sank into the detergent, which leads me to believe that the cotton ball is definitely less dense than the laundry detergent, due to its elevation. This also means that the cotton ball is less dense than all of the coins as well.     After that, I decided to test the buoyancy of paper. It was important that I made sure that the two pieces of paper were the same size. I left one piece flat, while I crumpled up the other piece. Both pieces of paper sank a bit into the water, but the c...

   Photo Blog #3   The place that I chose that I believe had experienced erosion is the concrete behind my apartment.The larger concrete tiles are about 3 feet by 3 feet, while the small concrete tiles are about 3 feet by 1 and a half feet. I think that it experienced erosion in the past because there is only a small part that looks eroded and there is no branching off of the crack in the sidewalk.    I can tell that erosion has occurred because of the shifted piece of tile in the bottom corner of the concrete tile. I think that the erosion could have happened within the past two years. The sediment looks like it was transported about only 3 centimeters. All of these photos were taken around 7:50 on Sunday April 20.

 Photo Blog #2 The item that I chose to focus my weathering blog on was the bike racks in Poly Canyon Village. I visited the PCV bike racks at around 4:30 PM on Saturday April 12th. The bike racks were a little taller than me, so they are about a little over 5 feet tall. There are several bike racks in this location and they all seem to be experiencing weathering.   I think this object has definitely experienced weathering in the past, while still experiencing weathering now. I think that the weathering is mostly chemical weathering with some physical weathering as well. The chemical weathering is demonstrated with the rusting of the metal and the physical weathering is demonstrated with the chips in the paint and other areas of the bike rack. The rust is probably due to the fact that the metal is exposed in an outside environment, so it can easily get wet when it rains. The chips in the paint are probably from people bumping their bikes onto the paint on the racks. I think th...

  Photo Blog #1 This is a photo of the rock that I selected. It is a light brown and light gray color. It is relatively rough with a lot of pieces of dirt on it. Environment     This is the environment where I found my rock. I went to look around my apartment (PCV) and I found a hill that separates my building from another building where I know a lot of plants and trees grow. I have also seen a lot of wildlife, such as birds or rabbits, in this environment as well. I chose this rock because I liked the size of it and it looked pretty naturally placed as opposed to some other items in the habitat. This includes the lamp posts as well as the sewer drain and the rocks placed around it. These photos were all taken Saturday April 5th around 12:50 pm. I do believe that this rock could have been formed in the location I found it in because the area is full of a lot of other natural elements. This rock looks like it could be formed from a lot of sediments, possibly from the ...