Dobbs' Dynamos

6th: )Why are surface waves more destructive to buildings than P waves or S waves are? Surface waves are more destructive than P waves and S waves because surface waves produce ground motion in the upper few kilometers of the Earth’s crust. After our discussion, I returned the test from yesterday and we watched a video about Earthquakes. You have  no homework, enjoy your weekend!

7th: )What  so we call the four stages of cell division? We call the four stages of cell division Mitosis. After answering the question, we watched a graphic of a cell undergoing mitosis. I then checked your warm-ups. Next you had a quiz on the microscope, which we have been studying all week. We then worked on the remainder of Section 3. You have no homework, enjoy your weekend!

6th: ) Our warm-up came from page 301 where we discussed the density of water, both frozen and liquid. We then had our Chapter 10 test. Your Warm-ups for this week are due tomorrow.

7tj: ) What do we call the substance that supplies energy to fuel cell activities? We call the substance that supplies energy to fuel cell activities ATP. We had our Section 2 quiz, then began work on Section3. For tomorrow you will have a quiz on microscopes and your Warm-ups from the last two weeks are due as well.

6th: )Our Warm-up came from page 297, #6. After our review we did an activity with soil horizons, then completed the Study Guide on pages 300-301, and the CRCT review on pages 302-303. You will have your Chapter 10 test tomorrow.

7th: ) In eukaryotic cells, where does the stage of respiration, that releases most of the energy, take place?The stage of respiration that releases most of the energy takes place in the mitochondria. After the discussion, we reviewed Section 2, then worked more on microscopes. For tomorrow you will have a quiz on Section 2, with some questions coming from Section 1.

6th:-) List five methods of soil conservation. Soil erosion and soil damage can be prevented by no-till farming, contour plowing, terracing, using cover crops, and practicing crop rotation. In class, we described how each of these helped prevent the loss of soil. We then heard more of  your lab write-ups,(these are amazing) and got started on Section 4. If you didn’t finish this in class, it is due for homework. Another web site with great graphics:>

http://www.classzone.com/books/earth_science/terc/navigation/chapter12.cfm

7th:-) When working with microscopes, what does resolution refer to?  Resolution refers to how sharp the image is when looking at it under the microscope. After our review and homework check, we had more  microscope practice, and then  worked on Section 2, if you didn’t finish it in class, it is due for homework.

6th: )If a soil sample is 60% sand particles and has 30 million particles of soil, how many of those soil particles are sand?After answering the question and hearing some of your presentations from our lab, we  reviewed our work from Friday,  took a look at some soil samples, then went on to Section 3, which is due for homework tomorrow.

7th: ) What is the difference between cellular respiration and breathing? Cellular respiration is a chemical process by which cells produce energy from food. Breathing supplies oxygen for cellular respiration and removes the carbon dioxide produced by cellular respiration. After the review, we continued into Chapter 4, on into Section 2. We also learned more about the microscope, and how it works. For tomorrow you need to complete your concept map and pictures of cellular respiration.

6th: ) Does the rate of chemical weathering increase or stay the same w hen a rock becomes more mechanically weathered? When a rock is mechanically weathered, the surface area of the rock can increase. Therefore, more of the rock is exposed to chemical weathering, and the rate of chemical weathering increases. Today we had our “Peanut butter and jelly geology” lab. It was a fun and “yummy” way to reinforce some concepts we have learned and are learning. For homework  you need to have the lab written up and ready to turn in by Tuesday.

7th: )Why is osmosis important to cells?  Osmosis is important to cells because cells are filled mostly with fluids that are made mostly of water. and osmosis, which is the  movement of water through a membrane gets the water in and out of the cell. After our discussion, we  had our quiz, then watched a video titled ” The Incredible World of the Microscope.” If you didn’t finish writing your 10 important video facts in class, then they are due for homework.

6th: )How does an increase in surface area affect weathering? As surface area increases, weathering increases. We did a demonstration lab on this concept, then did some review of work from this week. It was then on to Section 2 of Chapter 10. If you didn’t finish it in class, then it is due for homework.

7th: ) Our warm-up came from page 93, # 6. We did some review of our lessons from this week, plus extra work on learning about the microscope. Your quiz from this week will be due tomorrow.

 6th: ) What can cause oxidation? Oxidation occurs when oxygen combines with an element to form an oxide. We reviewed Section 1 and did some activities to go along with the concepts. We didn’t get a chance to start on Section 2, so we will work on that tomorrow.

7th: ) What is passive transport? Passive transport is the movement of substances across a cell membrane without the use of energy by the cell. We had our discussion about  passive and active transport, reviewed from the last two days, then did some work on the section review for Chapter 4, Section 1. You will need to have the section completed by tomorrow for homework. You will have a quiz on what we’ve covered this week on Friday. Don’t forget to study your microscope diagrams, there will be a quiz on the diagram coming up next week.

6th: ) List three animals that can cause weathering. Among the animals that can cause weathering are: ants, worms, mice, coyotes, and rabbits. We finished our project presentations, they were all so informative and well done, Good Job! We then got into Chapter 10. You need to finish the work for Section 1 for homework.

 The list of materials for our lab on Friday are as follows:  )                   white bread: Justin and Daniel   whole wheat: Jason   dark rye: Keeley   large jar of jelly: Brandon   crunchy peanut butter: Kevin   raisins:   Hannah

7th: ) Describe osmosis and give an example.Osmosis is the overall movement of water through a semi-permeable membrane from an area of high concentration until it reaches a state of equilibrium. We discussed how osmosis is different from diffusion, and did two demonstrations to enhance the concepts. We did some more study of the  microscope and I gave you a visual of a microscope to refer to and study. Have your vocabulary completed and study the parts of the microscope for your homework.

Welcome Back everyone! Hope your holidays were the best!

6th: )Name three things that cause abrasion. Three things that cause abrasion are: wind, water, and gravity. After the discussion, some new web sites, and a short introduction to Chapter 10, it was time for your presentations. You are all so very creative, thanks for all the hard work! Tomorrow we will get more into Chapter 10, for tonight read Section 1.

7th: ) Explain diffusion, give an example. Diffusion is the movement of particles from regions of higher density to regions of lower density. After the discussion and demonstration, we took a look at Chapter 4 and what we will be learning in this chapter. I also introduced you to some web sites on microscopes, which are posted to the right of this blog. We then worked on our vocabulary for the chapter. We will finish our cards tomorrow.