10/26

This week, we discussed the basic properties of cells. We did a math investigation to determine how changes in cell size (surface area and volume) affect the health of a cell. We also had the chance to view cheek and onion cells in the microscope, and we discussed the similarities and differences between plant and animal cell organelles. Next week we will be doing a "cell analogy" project in order to help us review the many cell organelles that we have learned about. We will be having a cell "structure and function" quiz on Thursday, so be prepared!

10/19

This week, we learned how to use light microscopes. We discovered how the microscope changes the position of an image as we practiced using them. We observed our hair under the microscope, and we also had the chance to explore other interesting prepared slides. This week we also discussed what it meant to "be alive." After our "is fire living?" discussion, we finally agreed that fire was NOT living because it did not have cells or DNA. Next week, we will talk about cells in more depth, and we will have the opportunity to view our own cells under the microscope!

10/11

This week, we did a flower "dissection" lab in order to more clearly view the reproductive parts of an angiosperm. Students had the chance to cut open the flower and identify the main portions of the stamen and the pistil. Many were surprised to find lots of eggs inside of the flower's ovary! We spent time reviewing the chapter on Wednesday and Thursday, and we took our first test on Friday. Next week, the students will learn how to use microscopes!

10/5

This week, we studied the characteristics of seed plants. For their lab this week, students were required to design a "wind-dispersing seed structure." We tested each structure (using a fan) to see which design traveled the farthest. Congratulation to all of our class period winners, and a special congratulations to our overall winning structure, which was designed by Kalee and Ivan! Students came up with some rather impressive and unique ideas for their structures! We ended the week by discussing plant parts and reproduction. Next week, we will dissect a flower, and we will have our first test on Friday. Remember that leaf collections are due on Tuesday, October 9th!