Juliette



Chemistry poems(all of them are in the document except the Diamonte and the cocrete poem, they are on paper)

Scientists list :

Homework : Chapter summary due on monday 4th october

The 5 questions before the chapter summary : 1: Definitions : a)Condense : When water vapour becomes water. b)Sublime : When a solid turns straight into a gas. Sublimation : Sublimation means that a solid changes straight into a gas when it is heated,it does not melt first. c)Melt : When ice becomes water.

2) The difference between freezing and melting is : melting means ice becoming water and freezing means water becoming ice.

3)To separate solid Iodine and sand, you could heat the mixture of Iodine and sand. And as Iodine original state is a gas, Iodine wil become a gas again and sand will stay the same.

4)Osmosis is the passage of a liquid from a solution to a more concentrated solution across a semipermeable membrane that allows passage of the solvent (water) but not the dissolved solids.

5) Brownian motion is the random movement of molecules in a liquid or gas due to their thermal energy. This term is named after the botanist Robert Brown who observed the random motion of tiny pollen grains as they were nudged by their collision with water molecules.

Chapter summ : 1) Particles are closest together in : a solid. 2)When a solid changes straight to a gas it is called : sublimation. 3)The opposite of evaporation is condensing. 4: answer c  5) answer a  6)  a)Diffusion is the spreading out of molecules. Molecules go from an area of high concentration to an area of lower concentration spreading out randomly. b)Diffusion happens. The particles spread out in the room and the whole room then smells perfume. c)You could measure the speed of food dye in water by timing how long it took for the food dye to fill the whole water. 7) a)Changes : 1-2:Melting/freezing,3-4:condensation/evaporation4-5:sublimation. b)1-2:water turns into a solid(freezing)/Solid turns into water(melting) 3-4:Water vapour becomes water(condensation)/Water becomes water vapour(evaporation)  4-5:ice changes straight into a water vapour(sublimation)  8) a)Osmosis is the passage of a liquid from a solution to a more concentrated solution across a semipermeable membrane that allows passage of the solvent (water) but not the dissolved solids. b)Experiment to investigate osmosis using plant materials : ??? c)on a paper 9a)on a paper. b)on a papar c)on a paper

Homework : Chapter summary due on thursday 30th september

1. Protons have a charge of +1. 2. The number of protons and neutrons in an atom can be the same. 3. The number of protons and electrons in an atom are the same. 4. Answer B. 5. Noble gases have a full outer level of electrons. 6. a)On a paper. b) It has 11 electrons. c) The mass of this atom is 11. d) I would find this element in the group #3. 7. a) 18 electrons can be fitted into the first three electron levels. b)On a paper. c) Sodium and Lithium are in the same group. Group #1. 8. a)On a paper. b)We call atoms like these (I do not know) c) similar example :(I do not know) 10. a) What's important about the numbers 2,8,8 is that they stand for atoms with full electron shells (for first,second and third). b) Sodium is a phosphoric acid.No it is not an ordinary atom, it's an atom that can be bounded together in rings forming metaphosphoric acid molecules. c) i) The mass of this particle is 23. ii) The overall charge of this particle is +1. iii) You would find similar element in the group #1. 11. a) Radioisotopes are used to kill cancer cells. b) Perhaps, It would be better to use radioisotopes for 2 or 3 days and then continue with surgery. I think so,because we know more about surgery than we know about radioisotopes. c) There are strict rules about radioactive materials because they want to prevent patients from any side-effects and they ensure that the patients receive only the exposure medically prescribed and that the radiation is delivered in accordance with the physician's instructions. d) Carbon dating is a variety of radioactive dating. 12. a) atomic number of fluorine : 9 b)The mass number means the sum of the number of neutrons and protons in an atomic nucleus. c)In the fluorine atom there are : 9 protons, 19 neutrons,9 electrons d) On the paper. 13. a)neutrons:56 protons:26 electrons:26 b)neutrons:93 protons:41 electrons:41 c)neutrons:238 protons:92 electrons:92 14. a)Atoms of the same element can have different numbers of neutrons,the different possible versions of each element are called isotopes. b)Chlorine-35- protons : 17 neutrons :18 electrons : 35 Chlorine-37- protons : 17 neutrons :20 electrons : 37 c)Chlorine-35 :2,8,7 Chlorine-37 :2,8,7 15. I did not understand 16. a)electrons in the outer shell :arsenic:2,8,18,5 b)electrons in the outer shell :bromine:2,8,18,7 c)electrons in the outer shell :tin:2,8,18,18,4 d)electrons in the outer shell :xenon:2,8,18,18,8 17. a)Carbon b)Argon c)Iodine d)Xenon e)Calcium f)Lead a) carbon is in group 4 of the periodic table. b)2,4 c)none. d)xenon,argon, e)calcium f) on a paper. 18) on a paper.

Homework : Book,chapter 1 questions.Atomic structure. Thursday 23 september. 1.Name the three particles we find in atoms: Protons,neutrons and electrons. 2.What is the link between atomic number and the number of protons in an atom? It is the same thing. 3. What is meant by the mass number of an atom ? The mass number is the total number of protons and neutrons in the nucleus of the atom. 4. Give an example of an element that is found as isotopes. example : carbon 12/carbon 13/carbon 14. 5. Do isotopes behave in different ways in chemical reactions ? no,they don't behave differently. The fact that they have varying numbers of neutrons makes no diference whatsoever to their chemical reactions. 6. What is unusual about the isotope called carbon-14? What is unusual about the isotope called carbon-14 is that it is radioactive. It's nucleus is unstable and radiation is released as it reorganises into a more stable form. 7. Describe one of the uses of radioactive isotopes. One use of radioactive isotopes is to kill cancer cells. 8. How many electrons do the elements of group 0 have in their outer shells ? They have ight electrons in their outer shells. 9. Draw the arrangement in an atom of carbon. 10. Why are the noble gases so unreactive? Because the outer electrons shell is full so they are no electrons are stable without having to react with anything. Atoms with full electron shells are very stable.

Homework : The scientific method : Due: 6 sep 2010

The scientific method : It is a serie__s__

of steps that scientists follow to answer questions and solve problems. The goal of the scientific method is to come up with verifiable answers and/or solutions. It is a procedure that conducts a hypothesis to reliable answers. It is a clear, understandable and structured way to verify doubts/hypotheses. It is a multi-step approach that allows __you__ to synthesize ideas.

Steps of the scientific method : Why do scientists use the scientific method ? What is the scientific method ? They use the scientific method because it is used by every scientists __(scientist)__ in any parts __(part)__ of the world, because it is a clear way to organize ideas. What is the scientific method ? the scientific method is a serie__s__ of steps that allows you to find out an answer to a problem or to find an answer to a question.

__(you should put the sentence They use the scientific method ..... in a new paragraph not in the same sentence as the questions. That same sentence i just mentioned does not make much sense since you have added to many 'because' in the sentence.__

To start, you have to ask yourself a question eg : What will happen if I freeze plant seeds ? You need to do background research wich means in that case, you will have to find how much time does your plant needs to grow, factors that affects plant growth etc.. form your hypothesis,(your hypothesis is not always right, it can be supported or disproved) think about what you want to find and from that, form your hypothesis. eg : If I freeze plant seeds then my plants will grow faster. Your hypothesis is what you think the results of the experiment will show. Then test your hypothesis : To test your hypothesis, you need to "conduct a scientific investigation", wich means you need to find results by experimenting. Make the procedure and test it. __(i would put "form your procedure" not "make the procedure")__ eg : Freeze your seeds during __("for' not 'during" )__ 4 days, grow your plant, make obeservations(write down any difference you can see from a plant wich do not have frozen seeds, then make a conclusion. Now you need to collect your datas __(you don't need the extra s)__ Once you finished your experiment, you need to organize your ideas. It can be done in a chart, or in any kind of diagrams. Now that you finished, you should be able to make a conclusion based on the datas collected and your hypothesis.

How scientists use the scientific method : Scientists use the scientific method when they have to solve a problem or verify something. They use it step by step. They try to find every detail as possible

How do I use the scientific method outside of a classroom : The scientific method is used everyday by everyone. Wether __(whether)__ to solve simple questions or to solve more complex problems. For example I used the scientific method this week-end : I was cooking tomatoes on the stove at high heat and I wanted my tomatoes to become a puree. And it became really quickly a tomato juice !! So now I know that next time I do that I will have to control the heat so It becomes perfect. The tomatoes were on the stove not too long, but the temperature was so hot that it took about five minutes for the tomatoes to become a juice. what i will have to do in the future is change the temperature on a little less hot, and a little longer.

__olivia__ I thought it was detailed but sometime a little tricky to understand, There was a few mistkes in the grammer and sometimes the sentence didnt make sence but apart form that i thought it was good. My sources : Old notes.. [] Task 2: Select a question. Explain how you would use the Scientific Method to answer the question. Describe an experiment you could do to answer the question. Can I blow square bubles ? Your paper must have the following information: Due Date is Tuesday September 14th. The question I chose : Can I blow sqare bubles ? How would I use the scientific method to answer the question ? What observations would lead to make square bubles ? You would first observe what exactly is happening blow a normal buble and then with that, you observe what factors make the buble a sphere. Then you can identify what impedes the buble to take the shape of a square. My experiment : Hypothesis : If I know what impedes the buble to be a square then I will be able to create a buble in the shape of a square. Variables to control : the shape of the buble. Experimental group : The shape of the buble. material :Square buble maker, it's a cube with round ends. Large bucket for water, Dish soap(no antibacterials or anything special,just normal) Pipette(you need to cut the end,the the top) Method :
 * How does water move through a plant?
 * Which soap kills the most germs?
 * Can a potato generate electricity?
 * Can I hit a baseball better with a wooden bat or an aluminum bat?
 * Do vegetables grown using pesticides differ in flavor from those grown organically?
 * How much trash does the average household in my community create per week? How does this compare with the national average?
 * Does presoaking seeds affect the germination and growth of plants?
 * Can I blow square bubbles?
 * How does acid rain affect plants?
 * Identify the question you are answering.
 * Explain how you would use the Scientific Method to answer the question. What oberervations would lead to make square bubles ?
 * Describe an experiment you could perform to answer that question.
 * Your experiment should contain a lab write up including: Hypothesis, IV, DV, Variables to control, Experimental group, control group, Materials, Method, and Data table.

 datas : Bubbles form because of the surface tension of water. Hydrogen atoms in water molecule are attracted to oxygen atoms in other water molecules. They like each other so much, they stick together. So why are bubbles round? as you dip the Square Bubble Maker into the solution, the solution is stretched between the angles and the bubbles stick to the sides of the structure, causing the bubbles to be square.
 * 1) Find a container to hold about 7.5 liters (2 gallons) of water.
 * 2) Add approximately 1/4 cup of liquid dish soap. You may need to change the amount of dish soap and water slightly. The real "bubble masters" prefer the Dawn brand but other brands work. Just try to avoid dish soap that contains antibacterial products.
 * 3) Mix the bubble solution with your hand.
 * 4) Dip the square bubble maker into the bubble solution. Always hold the model by an end. Dipping at an angle works best. Be sure that the model is immersed completely, so that all sides are covered. Gently lift the model out of the bubble solution. You should have a square bubble!

Sources : []