Freddie

chapter 5 homework: 1a. water and alka seltzer B. water and cornsyrup 2. alloys are a mixture of metals and the properties of alloy make it useful because it makes it stronger. 3. suspension contains the largest particles. 4. you could separate them by filtering it so the sand is left in the filter cause it is to big while the water is drained into a container. 5. pure water boils at 100C. ink boils at a higher temperature. 6. you will need to use a fractional method because this method is used to separate mixtures of liquids and they both have different boiling points. 7. Using Chromatography you can test ethanol and water to see which is which or their boiling points. 8.? 9.? chapter summary questions: 1. C 2. B 3. D 4. A 5. X is denser because it does not dissolve in water B.oil and water C. X and Y would stay together D. Distillation 6a. first get a filter paper and draw a dot in the centre with water soluble black ink. You will get a bowl and place the filter paper over the bowl, drop and couple of drops of water on the black dot. keep doing this untill the dot of water soluble black ink starts spreading out over the filter paper. homework: 1. condensation: is when gas goes to liquid 1b. sublime: is when something goes from solid to gas. 1c. Melt: is when something goes to solid to liquid.

2. the difference between freezing and melting is that melting is going from solid into a liquid and freezing is going from liquid into a solid. 3. you heat up the iodine so it becomes a gas so then you are with the sand aswell so those are seperated. 4. Osmosis is a process in which molecules travel through a semi permeable membrane. 5. Brownian motion are the effect that the moving particles have on other, larger particles.

1.A 2.C 3.D 4.C 5.C 6a. Diffusion is when gases spread out all by themselves 6b. particles start to spread out. 6c. you could put a few drops of food dye in a cup of water and time how long it takes for the colour to change to the food dye colour

7a. Mealting 2. Freezing 3. Evaporating 4. Condensation 5. Sublimation

7b. solid to liquid 2. liquid to solid 3. liquid to gas 4. gas to liquid 5. solid to gas 8a. Questions: 1. a + 1 2. number of neutrons and protons can be the same in the atom. 3. number of protons and electrons are the same. 4. a- I, II, III, IV 5. Noble gases have a full outer se of electrons. 6.
 * || mass || charge ||
 * protons || 1 || +1 ||
 * electrons || 1/1836 || -1 ||
 * neutrons || 1 || 0 ||

6b. electrons= 11 6c. atomic mass= 23 6d. found in group 1 7a. 1st shell= 2, 2nd shell= 8, 3rd shell= 18  7b. II. III)                                       7c. lithium and sodium  8a.                                                                                         8b. they call them Isotopes. 8c. carbon 12, carbon 13 and carbon 14 8d. even though they have different amounts of neutrons they do don't react different. 9a. it is 80 because it is the average 9b. 3 bromine molecules (81 and 81), (79 and 79), (79 and 81) 9c. 79 and 81 because they are different. 10a. 2,8,8 are the amount of electrons that can be placed on the first 3 energy levels.                               10b. no it is not because the protons and the electrons have to be the same. 10c. mass- 23 II) charge- positive III) group-1 11a. to kill cancer cells. 11b. yes radioactive would be best because surgery does not always work. 11c. because it can kill healthy cells as well. 11d. carbon dating is used to find out how old something is. 12a. 9 12b. mass number means neutrons + protons 12c. protons=9, neutrons= 10, electrons= 9     12d                                                                             13a. neutrons- 30, protons- 26, electrons- 26 13b. neutrons- 52, protons- 41, electrons- 41 13c. neutrons- 143, protons- 92, electrons- 92 14a. Isotopes are atoms that have the same number of protons but have a different number of neutrons that will make it have a different atomic mass. 14b.Chlorine 35- protons-17, neutrons-18, electrons-17 Chlorine 37- protons-17, neutrons-20, electrons-17 14c. 15a. 15b. 15c. 16a.Arsenic (As), 2,8,18,5 II) Bromine (Br), 2,8,18,7 III) Tin (Sn), 2,8,18,18,8 IV) Xenon (Xe), 2,8,18,18,9 17a. A,F 17b. A 17c. C 17d. B and D 17e. Calcium 17f. 82, Lead 17g. ???                               THE SCIENTIFIC METHOD
 * protons || neutrons || electrons ||
 * 6 || 6 || 6 ||
 * 6 || 8 || 6 ||

The scientific method is used to design and test an experiment.

You will start off by asking what you will be doing. Like How, What, When, Who, Which, Why, or Where? Then you will have to do your background research on your experiment, you will then make sure you have found out all the background research on your experiment. When your finished doing the background research you will have to construct a hypothesis, for example, if you boil an egg then, gradually over time it will get harder. Then you will do your experiment you will test it and make your own observations while the experiment is going on, for example after 5 minutes the egg has changed colour and got a lot harder. When your experiment is finished you will make your own conclusion and if your hypothesis is correct then you will make your final results, but if your conclusion is proven wrong then you will have to go back to your hypothesis and think where it went wrong and where you can change it and try again. It is good answers some question in one paragraph could use some more desription

Scientists can use the scientific method to make they experiments and tests. They will all so use it to make or create their new inventions.

It is not much it still doesn't explain how they use the scientific experiment qhat do they use it to help them with elaborate on experiments and tests

I could use the scientific method in my everyday life I could say, When I wake up every mourning and go downstairs and eat breakfast after I will wash my teeth by put tooth paste on and brushing my teeth, that would be the test by brushing my teeth. After get a fluoride tablet then see if you have brushed them properly and then if so, your hypothesis is proven correct, hypothesis: If I brush my teeth, then I will clean my teeth properly. If my teeth are still unclean then I will have to start again and prove your hypothesis correct.

The most useful sources were:

http://teacher.pas.rochester.edu/phy_labs/AppendixE/AppendixE.html

http://sciencebuddies.com/science-fair-projects/project_scientific_method.shtml

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Fred :) - Very interesting example on how to use the method in everyday life but it was a bit confusing in parts. Umm.. over all was it was pretty good... a few spelling errors and maybe a little more explanation might have clarified a few things. Other than that well done (: - Good Work Fred !

__//**Can I hit a baseball better with a wooden bat or an aluminum bat?**//__

Observations: I first heard about this experiment by watching a baseball match, and watching men hitting the baseball with 2 different sorts of made bats. (ie: one bat was aluminum and the other was a wood bat.) Hypothesis: If you use a aluminum bat while playing baseball, then you will hit further than hitting while a wooden bat. Materials:  · Aluminum bat  · Wooden bat  · Baseball  · Baseball launcher  · Helmet

Procedure:  1. pick up the wooden bat and put on your helmet  2. Step up to the plate and get ready  3. Hit the ball the best you can, 20 times  4. Measure the distances hit with the wooden bat  5. Pick up the aluminum bat  6. Hit the ball with the aluminum bat, 20 times  7. Measure how far you hit the baseballs with the aluminum bat.

Independent variable: type of material Dependent variable: distance travelled Experimental group: aluminum bat Control group: wooden bat

Data table:


 * numer of balls || wooden bat || aluminium bat ||
 * 1 ||  ||   ||
 * 2 ||  ||   ||
 * 3 ||  ||   ||
 * 4 ||  ||   ||
 * 5 ||  ||   ||
 * 6 ||  ||   ||
 * 7 ||  ||   ||
 * 8 ||  ||   ||
 * 9 ||  ||   ||
 * 10 ||  ||   ||
 * 11 ||  ||   ||
 * 12 ||  ||   ||
 * 13 ||  ||   ||
 * 14 ||  ||   ||
 * 15 ||  ||   ||
 * 16 ||  ||   ||
 * 17 ||  ||   ||
 * 18 ||  ||   ||
 * 19 ||  ||   ||
 * 20 ||  ||   ||

**//__ Blood Pressure : __//** **//__Question:__//** What is the blood pressure between people who are lying and people who are telling the truth?
=== **//__Hypothesis__//**: If you lie then your blood pressure will be higher than if you were telling the truth. ===

**//__Variables to control: __//**

 * =====** If they have been working out or lying down **=====
 * =====** Make sure the tell someone the real answer **=====