Marcela

Homework 12-10-10 Chapter 5 1.a. Solid dissolved in water: like salt in water. Liquid dissolved in liquid: like alcohol in water. 1.b. Solid dissolved in solid. Gas dissolved into liquid. 2. Alloys are a mixture of metals 3.suspension contain the largest particles, a solution has the smallest particles and a colloid are in between. 4. You can separate sand and water mixture by filtering it, because the particles of the sand are so big they will not go through the filter and you will be left with water. 5. Pure water boils at 100C, no, ink doesn't boil at the same temperature, it boils at a much higher temperature. 6. To separate alcohol and water you would need to use the fractional method, because this method is used to separate mixture of liquids because each liquid has a differential boiling point 7. To test out water and ethanol and see which is which you would have to found out what it's boiling point is an if it is less than 100C then it should boil faster, if it is more then it will take longer to boil 8. n/a 9. ?

Chapter 5 - Summary 1. C 2. B  3. D  4. A  5.a. X is denser because it doesn't dissolve in water 5.b. Water and Oil 5.c. X and Y would stay together. 5.d. Distillation 6.a. First get filter paper and draw a dot in the centre with water-soluble black ink then get a bowl and put the filter paper over it. Drip a few drops of water on the dot, keep doing this until the ink starts spreading out on the paper. 6.b. 6.c. I would put drops of alcohol instead of water 7.a. Dissolving, evaporation and boiling 7.b. sugar and molasses 7.c. Adding charcoal with absorb the brown colour. 8.a. Coffee filters, filters in AC to remove particles and filter paper can be used in the laboratory in school 8.b. No, this not true because it is not filtering anything, it just separates the water from the tea leaves 8.c. Gasoline and petroleum they are used for cars 9.a.  9.b. i) 950  ii) 1330 9.c. By doing an experiment. 9.d. Sodium chloride: from 0C to 100C the difference between them is 90, then for sodium nitrate: from 0C to 70C the difference is about 610 10.a.  10.b. It is unusual because it goes up and then down again. 10.c. You would see that it would start going down because Sodium Sulphate is at it's max amount of solute, if heat is added it would become unsaturated

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Homework: 01-10-10 Chapter 2 1.a. Condense: It is when something goes from gas to liquid 1.b. Sublime: It is when something goes from solid to gas 1.c. Melt: It is when something goes from solid to liquid 2. The difference between freezing and melting is that freezing is when something goes from liquid to solid and melting is when something goes from solid to liquid. Exactly the opossite 3. Heat up the Iodine so it turns into a gas, and then you are left with the sand 4. Osmosis is a process in which molecules pass through a semipermeable membrane, from a less concentrated solution into a more concentrated one. 5. Brownian motion is the effect that moving particles have on larger particles Chapter 2 Review 1. (a) Solids 2. (b) Sublimation 3. (d) Condensing 4. (c) I, II and III 5. (c) The lighter gas particles move faster 6.a. Diffusion is when gases spread out all by themselves 6.b. The particles start to spread out (diffusion) 6.c. Put a few drops of food dye in the glass of water and time how long it takes for the water to turn the colour of the food dye 7.a. (1) Melting (2) Freezing (3) Evaporation (4) Condensation (5) Sublimation 7.b. (1) Going from solid to liquid (2) Going from liquid to solid (3) Going from liquid to gas (4) Going from gas to liquid (5) Going from solid to gas 8.a. Osmosis is a process in which molecules pass through a semipermeable membrane, from a less concentrated solution into a more concentrated one. 8.b. Pour some water in a pot where there is dirt and pour some water in and watch as the water goes down 9.a


 * Name || Formula || Mass || Order of Diffusion ||
 * Ammonia || NH3 || 2774 || 2 ||
 * Carbon Dioxide || CO2 || 36864 || 3 ||
 * Hydrogen || H2 || 1 || 1 ||

Homework: 27-09-2010 Chapter 1 - Summary 1. Protons have a charge of (a) +1 2. The number of protons and neutrons in an atom (d) can be the same 3. The number of protons and electrons in an atom (b) are the same 4. The true statement is (a) I, II, III and IV 5. Nobles gases (c) have a full outer level of electrons 6.a.

6.b. The number of electrons is 11 6.c. The atomic mass would be 23 6.d. You would find this element in group 1 7.a. The first shell can hold up to 2, the second shell can hold up to 8, and the third shell can hold up to 18. 7.b. i)  ii) iii)  7.c. Lithium (Li) an Sodium (Na) are in the same group.  8.a.
 * || Mass || Charge ||
 * Protons || 1 || +1 ||
 * Electrons || 1/1836 || -1 ||
 * Neutrons || 1 || 0 ||

8.b. We call them Isotopes 8.c. Another example of Isotopes is for example: Carbon-12 and Carbon-13. Carbon-12 has 6 protons and 6 neutrons, but Carbon-13 has 6 protons and 7 neutrons. 8.d. 9.a. The atomic mass of bromine is given as 80 because, it is the average or the two isotopes. 9.b. 9.c.  10.a. The numbers 2, 8, 8 are important because those are the number of electrons that can be placed in the first three energy levels 10.b. No, it's not an ordinary atom, because in most atoms, the number of protons- in this case 11- and the number of electrons- in this case 10- are usually the same. 10.c. i) The mass of this particle is 23. ii) The overall charge of this particle is positive. iii) You would find similar elements in group 1. 11.a. One medical use of radioisotopes, is to kill cancer cells.  11.b. I think that surgery would be better than using radioactives because radiation might kill healthy cells as well  11.c. There is strict rules about the use of radioactive materials because, radiation kills healthy cells.  11.d. Carbon Dating is a chemical used to find out how old something is. It is important because, a lot of archeologists use it to determine how old is something they've found.  12.a. 9  12.b. Mass number means protons+neutrons  12.c. P: 9, N: 10, E: 9  12.d.   13.a. P: 26, N: 30, E: 26  13.b. P: 41, N: 52, E: 41  13.c. P: 92, N: 143, E: 92  14.a. Isotopes are atoms that have the same number of protons but different numbers of neutrons which will make it have a different atomic mass.  14.b. Chlorine-35 P: 17, N: 18, E: 17  Chlorine-37 P: 17, N: 20, E: 17 14.c.  15.a.  15.b.   15.c.   16.a. Arsenic, As: E: 33. 2, 8, 18, 5 16.b. Bromine, Br: E: 35. 2, 8, 18, 7 16.c. Tin, Sn: E: 50. 2, 8, 18, 18, 8 16.d. Xenon, Xe: E: 54. 2, 8, 18, 18, 9 17.a. A, F  17.b. A  17.c. C  17.d. B  17.f. Calcium 17.g. 82, Lead Homework: 23-09-2010 1. The three particles that we find in atoms are protons, electrons and neutrons 2. The atomic number and the number of protons is the same thing 3. The mass number is the total number of protons and neutrons 4. An example of an element that is found as isotopes is carbon 5. No, Isotopes don't behave in different ways in chemical reactions 6. Carbon-14 is unusual because it's radioactive 7. We can use radioactive isotopes to make food last longer, because when food is exposed to radioactivity, it kills all microbes 8. Group 0 has 8 elements in the outer shell 9.  10. The noble gases are so unreactive because it's outer shell is already full of electrons, which makes it stable, and they don't have to react. Homework: 17-09-2010
 * Protons || Electrons || Neutrons ||
 * 6 || 6 || 6 ||
 * 6 || 6 || 8 ||

Why do you believe that the colors would affect the pH? Do you feel there is a difference in the pH of the dye? Question: Do different coloured liquids have different PH scales? Hypothesis: If different colours are added to water then the PH scale of the different colours will be different IV: The colour write out, IV is actually the colored dyes DV: PH Scale write these out in sentences, pH of the water Control Group: Water Experimental group: Colours Variables to control: Amount of water and amount of colour

Take more time explaining instead of just writing one or 2 words.

Homework: 13-09-2010

**Does presoaking beans affect the germination and growth of plants? **

__Observation: __This person was telling me about when she walked pass a garden she saw a lady pre-soaking her beans and then planting them, she didn't know why she was doing that, after I was thinking about what she had told meand I thought, what if pre-soaking the beans affect their germination and the growth of the plant? __Research:__ "the first step in the seed sprouting process is the absorption of moisture. Nothing happens until the seed id sufficiently water logged" People recommend to pre-soak the seeds from 12-24 hours.

[|**http://www.scribd.com/doc/2181738/Quick-Start-Your-Garden-Presoak-Your-Seeds**] [|**http://idigmygarden.com/forums/showthread.php?t=8397**]

Lab Report:

Hypothesis: If I soak beans before planting them, then it will affect the growth of the plants affect it how? decrease sprout time? make them grow taller? grow slower? Be specific.

IV: Preasoaking beans

DV: Growth of plants once again growth how?

Experimental group: Presoaking beans

Control Group: Non-Soaking beans

Materials:

-Beans

-Water

-Pots

-Soil

-Ruler

Method:

1. Get the 6 beans

2. Pre-soak 3 beans for roughly 12 hours in water how am i presoaking these beans? you haven't told me. You must be detailed.

3. After 12 hours take them out

4. Get 6 pots, all the same size

5. Put the same amount of soil in all pots how much is that?

6. Get the pre-soaked beans

7. Put one in each pot

8. Get the other 3 beans (the ones you didn't pre-soak)

9. Put one in each pot

10. Label each pot, (seed1, seed2, seed3, seed4, seed5, seed6)

11. Measure each plant, every 3 days

12. Record the results on data table

Data Table:


 * || **Seed 1 (cm)** || **Seed 2 (cm)** || **Seed 3 (cm)** || **Seed 4 (cm)** || **Seed 5 (cm)** || **Seed 6 (cm)** ||
 * **3 days** ||  ||   ||   ||   ||   ||   ||
 * **6 days** ||  ||   ||   ||   ||   ||   ||
 * **9 days** ||  ||   ||   ||   ||   ||   ||
 * <span style="font-family: Calibri; font-size: 14pt; line-height: normal; margin: 0in 0in 0pt; padding: 0px;">**12 days** ||  ||   ||   ||   ||   ||   ||
 * <span style="font-family: Calibri; font-size: 14pt; line-height: normal; margin: 0in 0in 0pt; padding: 0px;">**15 days** ||  ||   ||   ||   ||   ||   ||
 * <span style="font-family: Calibri; font-size: 14pt; line-height: normal; margin: 0in 0in 0pt; padding: 0px;">**18 days** ||  ||   ||   ||   ||   ||   ||
 * <span style="font-family: Calibri; font-size: 14pt; line-height: normal; margin: 0in 0in 0pt; padding: 0px;">**21 days** ||  ||   ||   ||   ||   ||   ||
 * <span style="font-family: Calibri; font-size: 14pt; line-height: normal; margin: 0in 0in 0pt; padding: 0px;">**24 days** ||  ||   ||   ||   ||   ||   ||
 * <span style="font-family: Calibri; font-size: 14pt; line-height: normal; margin: 0in 0in 0pt; padding: 0px;">**27 days** ||  ||   ||   ||   ||   ||   ||
 * <span style="font-family: Calibri; font-size: 14pt; line-height: normal; margin: 0in 0in 0pt; padding: 0px;">**30 days** ||  ||   ||   ||   ||   ||   ||

<span style="font-family: Arial,sans-serif; font-size: 12pt; line-height: normal; margin: 0in 0in 0pt;">Homework: 03-09-2010 TASK 1

**<span style="font-family: 'Arial','sans-serif'; font-size: 12pt;">The Scientific Method Homework **

Explain a little more

<span style="font-family: 'Arial','sans-serif'; font-size: 12pt;">The Scientific Method is a method/guideline that scientist use to test a prediction that they have made. The scientific method is used to investigate a question that you’ve come up with, and to try to answer it by doing an experiment. The scientific method is not only a guideline but it is also used to study the environment and the world. <span style="color: #00ff00; font-size: 12pt; lineheight: normal; margin: 0in 0in 0pt; marginbottom: 0pt; marginleft: 0in; marginright: 0in; margintop: 0in;">﻿You Could have given an example as to how you could use it to study the enviorment and the world. It's a good explanation but you could've used an alternative word at the beginning of each sentence :) <span style="font-family: Arial,sans-serif; font-size: 12pt; line-height: 115%; margin: 0in 0in 10pt;">To start using the scientific method you have to pick a topic, choose a topic that really interests you. After you’ve picked your topic, you have to <span style="color: #128723; font-size: 12pt; lineheight: 115%; margin: 0in 0in 10pt; marginbottom: 10pt; marginleft: 0in; marginright: 0in; margintop: 0in;">identify a problem, then research it, and then come up with a question that you can answer after your experiment has been tested <span style="font-family: Arial,sans-serif; font-size: 12pt; line-height: 115%; margin: 0in 0in 10pt;">. Then you have to come up with a hypothesis. Your hypothesis must be constructed in a way to help you answer the question you came up with. To come up with a hypothesis, you have to write it this way: <span style="color: #128723; font-size: 12pt; lineheight: 115%; margin: 0in 0in 10pt; marginbottom: 10pt; marginleft: 0in; marginright: 0in; margintop: 0in;">If (I do this) then (this will happen). <span style="font-family: Arial,sans-serif; font-size: 12pt; line-height: 115%; margin: 0in 0in 10pt;">After you came up with your hypothesis, you have to design an experiment. Then after you have to list all your materials which is everything you’re going to be needing to do your experiment. After you have to do a step-by-step list of your experiment from the very beginning to the very end. Make sure you don’t miss anything, list every step in detail. Then you have to test your experiment, use your step by step, and make sure you don't miss any. After you've tested your experiment, you have to write down your results, which include: graphs, tables, observations, what you thought of the experiment, you have to analyse the results, make sure to be clear and to list the observations as detailed as possible. After you've done that you have to create a conclusion, which answers your question, and proves if your hypothesis was write or wrong. <span style="color: #00ff00; font-size: 12pt; lineheight: 115%; margin: 0in 0in 10pt; marginbottom: 10pt; marginleft: 0in; marginright: 0in; margintop: 0in;">﻿Good job explainig it but i feel like you used the word then to many times, it would have made the explination better if it was not used so often.

Dont use the same word, but well explained.

Good explanation but there's a lot of repetition at the beginning of the sentences :)

<span style="font-family: 'Arial','sans-serif'; font-size: 12pt;"> <span style="color: #00ff00; font-size: 12pt; lineheight: normal; margin: 0in 0in 0pt; marginbottom: 0pt; marginleft: 0in; marginright: 0in; margintop: 0in;">﻿Marcela, good use of pictures.

Good use of pictures

Good use of images :)

<span style="font-family: Arial,sans-serif; font-size: 12pt;">Scientist use the Scientific Method to help them answer questions, also to solve problems. We can use the Scientific Method everyday at school, or when you go home, or anywhere else, for example, you’re lost in a forest, and you know that your house is on the west, so you look at the sun and you know that the sunset will be on the west, So you go the way the sun is, or if its morning, the sun will be on the east, so you go the opposite way. good job putting in an example but It is very confusing. Tell us why this is a good example and what your testin tellin us which way the sun sets isnt telling me how this is an example of how scientists use the scientific method. Next time tell me how this can be tested. <span style="color: #00ff00; font-family: Arial,sans-serif; font-size: 12pt;">Overall good essay, But i think you could have explained on some things further and told us how you use the scientific method out of the classroom.

Good sources.

I liked the overall essay :)

<span style="font-family: Arial,sans-serif; font-size: 12pt; line-height: normal; margin: 0in 0in 0pt;">__Sources:__

<span style="font-family: Arial,sans-serif; font-size: 12pt; line-height: 14.25pt; margin: 0in 0in 0pt;">[]

<span style="font-family: Arial,sans-serif; font-size: 12pt; line-height: 14.25pt; margin: 0in 0in 0pt;">[]

<span style="font-family: Arial,sans-serif; font-size: 12pt; line-height: 14.25pt; margin: 0in 0in 0pt;">[]

<span style="font-family: 'Arial','sans-serif'; font-size: 12pt;">Picture: [] <span style="color: #76d576; font-size: 12pt; lineheight: 14.25pt; margin: 0in 0in 0pt; marginbottom: 0pt; marginleft: 0in; marginright: 0in; margintop: 0in;">

Taylor

<span style="color: #128723; display: block; font-size: 12pt; margin-bottom: 0pt; margin-left: 0in; margin-right: 0in; margin-top: 0in;">Marius FREDDIE Rachael :)