Hello Mr. Steele’s class! Today is Friday, February 25, 2011, and the last day of the week. I hope you all enjoyed your mini-break due to a giant snowstorm on Wednesday and Thursday. This morning, we went through our morning routine, and at 9:15, we went to library. We have a new book report on our favorite author. The librarian passed out a handout that explained what was expected in the book report, things to think about and include in the book report, and note pages to write down our thoughts and plan our report (for the layout of the report). We also had time to check out books. When we came back at about 9:55, we went on to “Mystery Class” with our groups. We then went onto BBC, a website all about fossils.
Three things I learned are; The first thing I learned was in order to make a fossil you have to get buried immediately to keep it safe from animals, critters, and the weather, but it also has to be around rock so it will be preserved. An ideal place to make a fossil is somewhere muddy, like a river or a creek, because they will sink or be covered up by sediment which will keep animals from being eaten by small critters or animals. It will also prevent the air from making them rot. Lakes and oceans are also an ideal place for forming a fossil for similar reasons. The second thing I learned is how fossils are formed. The fleshy part of the animal can be eaten, leaving the bone and teeth behind. The skeleton is then buried beneath mew layers of sediment, but this will only happen where the ground is continually sinking. Because of the weight of the layers above, the pressure on the lower levels increases. The pressure fuses the rock together forming sedimentary rock. Other hard body parts may stay intact and encased in the rock. Then the ground slowly shifts up, taking with it the remains of the animal. Sometimes though, ground water is acidic and dissolves the skeleton, and if the rock is solid enough, a cavity is formed in the shape of the animal's skeleton, which is called a mold. Then the ground water can seep into the mold with minerals and fills, therefore making a mold cast. Then the ground moves up again, taking the fossil with it. Sometimes though, the skeleton goes too deep and is crushed, or doesn't go deep enough and is scattered. It just depends. The third thing I learned is foot prints can tell us how fast an animal moved, how it behaved, and more. We then went on to work on ‘The Girl Who Married the Moon”. At 12:10, we went to lunch.
When we came back, we did lesson 5.2 in math. We were trying to find out how much money we could spend for lunch, with tax and tip, but without going over a set amount. We then had “Steps to Respect” with Mr. B. After we finished with him, we finished our math lesson and went on to the science article on fossils in our “Earth History Resources” book. The article covered index fossils, and the periods the fossils were placed. It even covered radioactive decay and how we can measure the earth by measuring how much lead and uranium is in that rock layer. One question to Google “Where does uranium come from? Then we stopped to do jobs and PSV. Then we left. Enjoy your weekend! Here’s the homework:
Homework
Read 30 minutes and Reading Record
BP3, p 67, Q# 7-14 & 19-20
Math Packet Days 15 & 16
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