11/7/11
7th graders - Homework is to: 1) write 5 STAR note questions based on today's notes; and  
2) Reflect on and revise your answer to the Challenge question ("How much carbon dioxide is in your exhaled breath? Give evidence").
Vocab quiz on the following vocabulary words on THURSDAY:
a) respiratory system - The system of organs that work together to take oxygen into the body and to remove carbon dioxide from the body.  Your body uses oxygen to get energy from food, and carbon dioxide (a/k/a CO2) is a waste product from that process. 
b) indicator - chemicals that change their appearance in different types of solutions.  Ex: BTB
c) tendons - tissue that attaches muscles to bones
d) Ligaments - are pieces of white tissue that attaches the bones together at the joint.
e) bones - hardened connective tissue that forms the skeleton in most vertebrates.
f) growth plates - areas near the ends of long bones in children & teens that produce new bone tissue & determine the length & shape of adults' bones.

g) joints - A junction between 2 or more bones, usually allowing some motion.
h) Simple Machines - a machine that makes work easier by taking the effort put into the machine and changing its size, direction, or speed. Ex: lever, wedge, wheel & axle.
i) lever - a bar that is free to turn around a fixed point, called a fulcrum.
j) muscles - tissues in a system that help various parts of the body to move
k) contract - muscle cells slide over each other, making the muscle smaller, which pulls tendons and bones to cause joint movement. You bend your arm by contracting your bicep.
l) relax - muscle cells slide away from each other, making the muscle longer, which partly releases the pull on tendons bones; opposite of contract.k)

6th graders - For your project, complete the Household Hazardous Materials Table, which will be checked on Wednesday.  Also, those of you who have checked the blog have an advantage.  We will have a vocab quiz on the following vocabulary words on THURSDAY:
1) Atoms - tiny particles that make up each element. A pure sample of an element contains many atoms of the same type.
2) Element  - is a substance that cannot be  broken down into simpler substances by heating it or causing it to react with other chemicals
3) Molecules - two or more types of atoms held together by bonds
4) Compounds - substances formed when elements react.  Substances made up of molecules (two or more types of atoms held together by bonds) are called compounds.
5). Hardness - what else will scratch it? What will it scratch?
6) Luster- is it shiny? In other words, does it strongly reflect light? If not, we say it looks "dull". If yes, it can be "brilliant" (very shiny); "glassy", "metallic", or "waxy".
7) Light Transmission - Does light pass through it? Transparent means light passes through it (ex: glass); Translucent means some light passes through it but it is blurry; and Opaque, which means that light does not pass through the material.
8) Texture - How does it feel when you touch the material? Is it smooth, rough, grainy, or gritty?
9) Flexibility - Does the material bend with gentle pressure? If no, it is inflexible; if it bends slightly, it is somewhat flexible; if it bends easily, then it is very flexible.
10) Reaction with HCl - does it bubble, smoke, change color, give off heat, light, precipitate, or gas?