Patrick

Week 3 4-23-09

1. This week in Science I have learned about the law of conservation of energy and matter. This law states that energy can not be created or destroyed; only change. The law also states that mass will not change when there is a chemical reaction. 2. I also learned about kinetic and potential energy and the types such as radiant, motion, sound, gravitational, and chemical. Kinetic energy is the energy of motion, and Potential energy is stored or energy of position. 3. One question I still have is how you tell whether a atom has potential to gain or lose electrons. 

=
This week in science I have learned about the periodic table. The periodic table is organized by an elements atomic mass and number, and weather they are metals, non-metals, or metalloids. They are also orgainized by groups and periods which determine how many energy levels there will be and how many electrons will be in the outer vallence shell. I also learned how to draw a model of an atom. Using the periodic table you can determine how many protons and neutrons will be in the nucleus of an atom and how many electrons will be in the energy levels of the atom. I learned that you have to subtract the atomic number from the atomic mass to get the number of neutrons that are in a particular element. Last but not least I learned that the outer energy level of an atom is called a valence shell.=====

=
Week 4=====

=
1. This week in Science I have learned a lot about the anatomy of frogs. Some things I learned about the external anatatamy of frogs is that they have adapted to live in moist environments. They have a membrane which covers their eye to help them see underwater. There back feet are webbed, but their front are not.=====

=
2. I also learned that a frogs internal anatomy is similar to that of ours. The main difference is there urogenital system, and the way it is layed out. The frogs liver, is the biggest organ in his bodie. I found that disecting frogs was interesting.=====