Overall, I think the building process went well for my group. At first, I found it kind of hard to choose a structure to build, because the Immune System had so many diffenrent structures. But then we made a plan to make several different models of Different Lines of Defense, Antibody Antigen Reaction, Vaccinations and a Display of Different Organs and Structures of the Immune System. For the Lines of Defense, we made two simple models, one being how the skin acts like a sheild to keep pathogens out and what happens when you get a cut. We used scissors, beige colored paper, and a clay pathogen for this model. The other model we made showing lines of defense in the Immune System was one that showed how mucus in the nose traps pathogens that may come in your nose while inhaling. We used Elmer’s glue in green food coloring, clay pathogens, and an enlarged nose made from cardboard. To show an Antigen Antibody Reaction, we made a very simple model out of cardboard, magnets and tape. We cut out a carboard Antigen and Antibody that fit inside one another, and we taped magnets to them to make them bind together. To show vaccinations, we used beige paper, a syringe with green water and yellow clay and a cup with cotton balls in it. The paper represented the skin, and the green water and clay showed anitgens, and the cotton balls were white blood cells. When the ‘antigens’ were put into the cup, the cotton balls absorbed it, or ate it. But the clay shows that they remember how to make the antibodies for that specific antigen. We only decided to make a display later into the unit. We made a cardboard person, then we glued clay organs and structures onto it. We made structures and organs such as Tonsils and Adenoids, Lymph Nodes, Lymphatic Vessels, Thymus, Spleen, Appendix and Bone Marrow. Then we made labels with definitions on the back. Overall, I think my groups models are good,
Science Model Reflection
Above are pictures of some of the models my group has made. I think we are doing pretty well. At first, we didn’t know what we were doing, but then we made a proper design and we were able to focus much better. We are planning to bring all four of our models into the BBT and on Thursday I am planning to come to introduce it.
Body System Choice
The body system I want to research is the Immune System. I have chosen the Immune System because to me it is the most interesting. I have done some research on it already and I know a lot about it already. For me, it is easiest to understand. In addition, for the model I am thinking about what a few of the structures will look like and what they’ll be made of. Therefore, I would prefer to research the Immune System.
Metals are good conductors of heat because the atoms in metal have free electrons whizzing about outside atoms. Suppose the bottom of two spoons touch hot water(one plastic, one metal.) The metal one would heat up much faster because once the free electrons became hot, they would whiz aroud a little faster. Every time a hot electron bounced off of an atom, that atom would vibrate a little quicker, heating up. Good conductor means it can conduct heat fast. Conduction is related to a state of matter because conduction is how the heat transfers through objects and in the states of matter unit we learned and did experiments about the molecules speeding up.
Hot water and air rises because of the Principal of Buoyancy. When water or air heats, the molecules move quicker and spread out making it less dense. When it is less dense, it rises up. Higher up it cool, making it more dense so it would go down again. When this happens again and again it is the Principal of Buoyancy. This relates to the states of matter unit because during our experiments we realized that the water followed the Principal of Buoyancy when things floated.
Thermal Radiation can be transfered from a campfire to a human by energy waves through air or even empty space. When the waves reach the person, it heats up the molecules making them vibrate a little faster making you feel hot. This relates to the States of matter unit because when we heated water or any liquid and we put our hands over it, we could feel the heat.
The Water Cycle
This is a diagram of the Water Cycle. The energy source comes from the sun and goes to the water sources, causing them to evaporate. The water comes from oceans, run offs(water that runs off from mountains and hills), lakes, ground water, persperation, urination and seas. The water first evaporates because of the energy source. When the water vapor (gas) gets to the sky it forms a cloud and turns back to liquid because its colder higher up in the atmosphere. When it gets too heavy for the cloud, it rains – or precipitates. It can take different forms while precipitaing like rain, snow, hail or sleet. The water then falls back down to where it came from and the cycle starts all over again.