1.1) solution is a mixture of 2 or more substances, colloid is a substance diffused in another substance, suspension is a fluid containing solids.
1.2) they dissolve
1.3) it changes the mass and substance
1.4) you made a solution because you are adding 2 fluids
1.5) solvents freezing point changes depending on the mass of the solute
2.1)how much of a given substance is in another substance
2.2) it can be removed or added
2.3) temperature, volume, mass, pressure
2.4) it makes their particles slow and makes them stiffer or harder
2.5) it shows you basses and acids
3.1) Blue on litmus paper, sour, liquid, reacts with metals
3.2) soapy, slippery, red on litmus, reacts with acid
3.3)acid turns red on litmus, bases, blue
3.4) it is sour or wet
3.5) because fertilizer has acid in it and can burn skin
4.1) hydrogen
4.2) carbon
4.3) carbon
4.4) it is acid
4.5) more hydrogens
5.1) acid breaks it down, bases re build it
5.2) they have acids, and bases
5.3) it makes it harder for the acids to break it down
5.4) saliva
5.5) it changes due to acids and bases
Wednesday, December 1, 2010
test1, how do we know about electrons?
We know about electrons even though they are so small because in 1896, JJ Thomson did expiraments using cathode rays. Cathode rays concentrate electrons in a stream that can be seen through a vacuum tube. Cathode rays can also be seen through Crookes tubes, which sends electrons in straight lines from a cathode ray to form the shadow of an object. Johann Wilhelm Hittorf was the first to truly discover the electon though, he did this when he discovered that there was a glow from a cathode when he decreased the gas pressure in 1869. Hittorf used this discovery to advance scientific technology farther when he created the Cathode ray. This tool was later supplemented with William Crookes' vacuum tube for the cathode rays making the expiramentmuch more effective.
Over time, more expiraments have been done on the electron over time, to prove that they are negetive charge, and for us to learn more about them. We are still learning more about the electron as time goes on because our tools and technologies advance, opening doors for our knowlege of electrons to expand. These Cathode rays inside the Crookes tubes are what helped us discover electrons, in a broader category, we know about electrons, even though they are so small because of technological advances over time.
Over time, more expiraments have been done on the electron over time, to prove that they are negetive charge, and for us to learn more about them. We are still learning more about the electron as time goes on because our tools and technologies advance, opening doors for our knowlege of electrons to expand. These Cathode rays inside the Crookes tubes are what helped us discover electrons, in a broader category, we know about electrons, even though they are so small because of technological advances over time.
Wednesday, November 17, 2010
hw 9
1.1) farenheit, celcius, and kelvins
1.2) the higher the temp. the more thermal energy
1.3) it means the section's heat is very warm
1.4) because your body heat is warmer then the ice
1.5) because of the denstity and material/ material's ability to hold heat
2.1) mercury gets warm and moves up the thermometer
2.2) they are farenheit, celcius, and kelvins, they are different because they have different numbers for different temps.
2.3) 42 degrees F
2.4) 224 degrees
2.5) 83600
3.1) conducion, convection, radiation
3.2) up
3.3) conductors conduct heat, insilators hold heat
3.4) conductor because heat travels through it
3.5) you would set up a tent because heat would travel up and away.
4.1) thermal energy
4.2) it becomes more flexible
4.3)because the temperature does not change the state fully
4.4) when heat becomes so high it loses substance
4.5) because otherwise the heat will be trapped and cause mr potatoe head to go boom boom!!!
5.1) they use heat to expand and circulate
5.2) internal uses gasses while external uses fluids, both break down energy
5.3) because it is more efficient to use gasoline and it holds more energy
5.4) matter slows down and hardens
5.5) heat would not be allowed out and would stay in as long as the door was shut along with the cold air
1.2) the higher the temp. the more thermal energy
1.3) it means the section's heat is very warm
1.4) because your body heat is warmer then the ice
1.5) because of the denstity and material/ material's ability to hold heat
2.1) mercury gets warm and moves up the thermometer
2.2) they are farenheit, celcius, and kelvins, they are different because they have different numbers for different temps.
2.3) 42 degrees F
2.4) 224 degrees
2.5) 83600
3.1) conducion, convection, radiation
3.2) up
3.3) conductors conduct heat, insilators hold heat
3.4) conductor because heat travels through it
3.5) you would set up a tent because heat would travel up and away.
4.1) thermal energy
4.2) it becomes more flexible
4.3)because the temperature does not change the state fully
4.4) when heat becomes so high it loses substance
4.5) because otherwise the heat will be trapped and cause mr potatoe head to go boom boom!!!
5.1) they use heat to expand and circulate
5.2) internal uses gasses while external uses fluids, both break down energy
5.3) because it is more efficient to use gasoline and it holds more energy
5.4) matter slows down and hardens
5.5) heat would not be allowed out and would stay in as long as the door was shut along with the cold air
Thursday, November 11, 2010
i do not know what to do with my test... i am posting it and emailing (verb?) it...
ATOMIC TEST 1 Name_____________
1) When was the first atom discovered?
a) 1661 b) 604 BCE c) 1741 d) It hasn’t been found yet
2) Who was the first documented person to know that there were atoms?
a) Dalton
3) When do atoms naturally die?
a) When we kill them b) Every second c) Exactly 100 years d) Never
4) What is made up of atoms?
a) Only brain matter b)nothing c) Everything (larger than atoms) d) Only food
5) What do atoms do all day?
a) Nothing b) They are in constant motion c) they gather food d) die
TURE or FALSE
6) ______ Atoms need food to!!!
7) ______ Atoms can kill
8) ______ everything in Earth and only Earth is made of atoms
9) ______ Rutherford is the creator of the most modern atomic model
10) ______ Democritus made the very first Atomic model ever
11) ______ When atoms die they explode
12) ______ JJ Thomson discovered the electron through cathode rays
13) ______ JJ Thomson also discovered neutrons through EMI rays that magnify neutrons
14) ______ Rutherford killed JJ Thomson to steal his work
15) ______ Rutherford discovered electrons through his famous gold foil experiment
Explain how with each Atomic model from JJ Thomson to our modern atomic model, the technology has advanced parallel to our understanding of what Atoms are made of, and what they look like. Please write a 4 paragraph essay in the space given or on a separate sheet of paper. (5 points)
Wednesday, November 3, 2010
matter hw
1.1) Because weight changes in different elevations
1.2) 688.5 cm sq.
1.3) g/v cubed
1.4) mass / volume
1.5) L x W x H
2.1) physical is a visible change, chemical is a change in chemicals
2.2) dispalcement, synthesis, decomposition, and combustion
2.3) mass of a closed space will remain constant- empedocles
2.4) thermal energy is energy from heat whereas heat is the movement of particles
2.5) exothermic is giving off heat, endothermic is taking in heat
3.1) thermal, kinetic, electric
3.2) kinetic
3.3) potential
3.4) a wave of energy in matter
3.5) thermal energy is matter moving and generating heat
4.1) in warm temperatures, particles speed, in cooler they slow
4.2) because the particles speed up and hold it more losely
4.3) the vibrations hold matter together
4.4) when the particles move fast and escape
4.5) when solid turns into a gas before liquid
5.1) between pressure and volume
5.2) because the gas expands
5.3) pV=K
5.4) so they know necesarry pressures
5.5) so they know how much air is in their oxygen tanks
1.2) 688.5 cm sq.
1.3) g/v cubed
1.4) mass / volume
1.5) L x W x H
2.1) physical is a visible change, chemical is a change in chemicals
2.2) dispalcement, synthesis, decomposition, and combustion
2.3) mass of a closed space will remain constant- empedocles
2.4) thermal energy is energy from heat whereas heat is the movement of particles
2.5) exothermic is giving off heat, endothermic is taking in heat
3.1) thermal, kinetic, electric
3.2) kinetic
3.3) potential
3.4) a wave of energy in matter
3.5) thermal energy is matter moving and generating heat
4.1) in warm temperatures, particles speed, in cooler they slow
4.2) because the particles speed up and hold it more losely
4.3) the vibrations hold matter together
4.4) when the particles move fast and escape
4.5) when solid turns into a gas before liquid
5.1) between pressure and volume
5.2) because the gas expands
5.3) pV=K
5.4) so they know necesarry pressures
5.5) so they know how much air is in their oxygen tanks
Sunday, October 24, 2010
catalysts
After testing to see if either salt, vinegar, or vegetable oil was a catalyst by seeing which one made water boil fastest, we realized that neither salt, nor vinegar was a catalyst. Both of these variables were proven wrong when both boiled at exactly 8 minutes, and 50 seconds. However, when we introduced vegetable oil to the expirament, the water boiled at 4 minutes and 45 seconds. This means that vegetable oil is a catalyst because it sped up the expirament by 4 minutes and 5 seconds. This proved my hypothesis wrong because I beleived that salt would help water boil fastest and that vegetable oil wouldn't make any differance. An observation that I had during the expirament is that the water would bubble every few seconds in temperature rises. There was a pattern to the bubbles every minute or so, but with the vegetable oil, there was no pattern at all, it was as if the oil sped up and cut out a whole part of the expirament.
Wednesday, September 1, 2010
Democratus Versus Thomson
By Jack Sheehan
Two people that I have learned about and have also liked to learn more about are Democritus and J.J. Thomson. I chose these two great minds because I believe that they are the most different from each other as all the scientists I learned about, yet they also have some similarities.
Democritus was unique because he had no teachings and no technology that allowed him to study the atom. Yet his great mind and philosophy lead him to discover that the atom existed even though he couldn’t see it. Democritus realized that atoms were indestructible. He also thought that atoms came with different locks and attachments. One thing that is very important about Democritus’ theory is that it is still a parallel to what scientists believe today! Democritus literally gave birth to the modern science of atoms.
J.J. Thomson is another very important name in the ladder of the atomic revolution. Although maybe not as important as the man who started it, Thomson jumpstarted or restarted Democritus’ theory of atoms after it had been forgotten over a thousand years before. Not only did Thomson uncover Democritus’ long forgotten work, but he figured out a missing link. J.J. Thomson figured out the electron. Even if Thomson put the electron in the wrong place, he still was the first one to find it. He proved every scientist to come before him wrong when he proved to them that atoms were not indivisible, by discovering the electron. On another experiment that many scientists had failed, he created a beam of atoms. He said other scientists had got it wrong because they put too many gasses in their Crookes tubes.
These two of the world’s most important atomic scientists have proved points on a ladder that will go through history. Even though this seems near impossible, the top of the ladder has not been reached yet. It could take millions of years to be understood.
Two people that I have learned about and have also liked to learn more about are Democritus and J.J. Thomson. I chose these two great minds because I believe that they are the most different from each other as all the scientists I learned about, yet they also have some similarities.
Democritus was unique because he had no teachings and no technology that allowed him to study the atom. Yet his great mind and philosophy lead him to discover that the atom existed even though he couldn’t see it. Democritus realized that atoms were indestructible. He also thought that atoms came with different locks and attachments. One thing that is very important about Democritus’ theory is that it is still a parallel to what scientists believe today! Democritus literally gave birth to the modern science of atoms.
J.J. Thomson is another very important name in the ladder of the atomic revolution. Although maybe not as important as the man who started it, Thomson jumpstarted or restarted Democritus’ theory of atoms after it had been forgotten over a thousand years before. Not only did Thomson uncover Democritus’ long forgotten work, but he figured out a missing link. J.J. Thomson figured out the electron. Even if Thomson put the electron in the wrong place, he still was the first one to find it. He proved every scientist to come before him wrong when he proved to them that atoms were not indivisible, by discovering the electron. On another experiment that many scientists had failed, he created a beam of atoms. He said other scientists had got it wrong because they put too many gasses in their Crookes tubes.
These two of the world’s most important atomic scientists have proved points on a ladder that will go through history. Even though this seems near impossible, the top of the ladder has not been reached yet. It could take millions of years to be understood.
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