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Oxygenated blood moves through the capillaries to larger vessels that take it to the heart. The heart then sends it out through arteries. Smaller vessels will deliver the oxygen to cells all over the body. Cells get rid of CO2 and it travels in the blood through the smaller then larger vessels back to the heart. Blood low in O2 is then sent to the lungs where gas exchange takes place (CO2 out and more O2 in). The cycle continues...

Next time (after circulatory system intro):

Force & Motion

Force and Motion

https://www.youtube.com/watch?v=lK1ci50DUgc#t=165.28414 Mythbusters giant tablecloth 4:56

Rube Goldberg

https://www.rubegoldberg.com/about/ About Rube Goldberg 4:08 scroll down a bit

https://www.youtube.com/watch?v=Z5M6VRsME-Q Mythbusters Christmas 2:08

https://www.youtube.com/watch?v=Y8cuuP4Jmio OK Go 7:17

https://www.youtube.com/watch?v=qybUFnY7Y8w OK Go 3:53 **

http://coolmaterial.com/roundup/rube-goldberg-machines/ Page Turner 2:08 scroll down just a bit

The next one Honda - The Cog is good too 1:59

https://www.youtube.com/watch?v=xdPDn1KUz_A time machine 2:36

https://www.youtube.com/watch?v=mTjJzF_Oaow 2012 Guinness Book World's Largest (layers) 1:50

More for another time...

http://youtu.be/QQ9gs-5lRKc 1 Marbles and magnets 4:04

https://www.youtube.com/watch?v=rX7yCnbp9bQ student Easy project 19 takes! 2:44

https://www.youtube.com/watch?v=YCDbiAhxJ4M 200,000 dominoes 17:55

Simple Machines

https://www.youtube.com/watch?v=l1Fhs8pXGxM Song! 1:54

Simple Machines for Kids: Science and Engineering for Children - FreeSchool

https://www.youtube.com/watch?v=fvOmaf2GfCY 6:11

https://docs.google.com/document/d/1kQUcuqMacnQNtsR_HtcfHdAkgOH1bQyv4bNu2pR96Ws/edit

Bill Nye Simple Machines

Not great, but it fits in. (Could leave out)

https://www.youtube.com/watch?v=Kg_vZ2pgQEs&t=294s Science Trek

Genetics https://www.davis.k12.ut.us/cms/lib09/UT01001306/Centricity/Domain/5845/Inherited%20vs%20aquired%20traits%20PPT.pdf

What is a gene?

A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases. The Human Genome Project has estimated that humans have between 20,000 and 25,000 genes.

Every person has two copies of each gene, one inherited from each parent. Most genes are the same in all people, but a small number of genes (less than 1 percent of the total) are slightly different between people. Alleles are forms of the same gene with small differences in their sequence of DNA bases. These small differences contribute to each person’s unique physical features.

Genes are made up of DNA. Each chromosome contains many genes.

Credit: U.S. National Library of Medicine

Males have one Y chromosome and one X chromosome, while females have two X chromosomes. In mammals, the Y chromosome contains a gene, SRY, which triggers embryonic development as a male.

What is DNA?

DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA).

The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people. The order, or sequence, of these bases determines the information available for building and maintaining an organism, similar to the way in which letters of the alphabet appear in a certain order to form words and sentences.

DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix. The structure of the double helix is somewhat like a ladder, with the base pairs forming the ladder’s rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder.

An important property of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases. This is critical when cells divide because each new cell needs to have an exact copy of the DNA present in the old cell.

DNA is a double helix formed by base pairs attached to a sugar-phosphate backbone.

Credit: U.S. National Library of Medicine

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