Friday, April 30, 2010
Thursday, April 29, 2010
Saturday, April 24, 2010
During the Science period of Friday, April 23 2010, we additionally explored the activities being held later on this year. In the first minutes of class, Ms. D mentioned that our scheduled "Celestial Body Test" had once again been postponed as the Croatian classes are taking a trip to a theatre. Despite the fact that we are not having our test on Tuesday, Ms. D still highly recommended you prepare yourself (the chart) over the weekend. She took this further by saying that we CANNOT share our notes with anyone in the class as they will be taken away from both you and the person you shared them with. Prior to that, Ms. D made it clear to take blogger more seriously, look at what you are posting, chose your videos wisely, and make sure your commenting is appropriate, as she will be showing this Blog to others. Keep in mind, you need 3 Eighth grade posts, 3 Seventh grade posts, and 2 Sixth grade posts for Blogger. If experiencing trouble commenting on the 6th and 7th grade blogs, scroll to the bottom of the page where the verification button is as this will allow an access to commenting. Astronomy then ends on May the 7th, and we will be moving forward into Chemistry. As discussed, we will only be having Chemistry, and very little Astronomy in our Science Final.
Thursday, April 22, 2010
Today, in science class, April 22nd, 2010, we continued our forum discussion in connection with the planet packet. However, we first focused on a very important event which is happening today, the 40th anniversary of Earth day. Earth day was started in the US in 1970 but the UN celebrates international Earth Day on March 20th/ 21st. On this special day they also ring a peace bell.
In connection with Earth Day, we will also be planting plants tomorrow and take them home as a way to give back to the environment.
In our discussion about Earth day we brought up some important things such as one major problem at the moment: global warming. It is referred to as the extremes in climate which have drastically changed in the past years. The causes of global warming are being discussed and there are many theories; but, Ms. D pointed out that since carbon emissions have increased in the past years there have been extreme changes in weather patterns. If this process continues we may even end up resembling Venus; The hottest planet which melts metal on its surface, which would not be a pleasant thought!
Lastly, we watched videos and a slideshow in connection with Earth Day. The links to the videos are just below:
Photography - http://www.youtube.com/watch?
During class, Ms. D also gave us corn starch Styrofoam which indeed is very edible. (:
- The smallest exosolar planet they have found is Jupiter size
- The 4 spacecrafts with the sole mission of leaving this solar system are called Voyager 1, Voyager 2, Pioneer 10, and Pioneer 11. These all went in different directions in our solar system!
- Further explanation of 3 ways to find Exosolar planets:
1) Radical Velocity Method
-It is Earth based
- They find rays from the Parent star (Star which Exosolar planets orbits around) and measure the wavelength. If this wave length is abnormal or weird they suspect that they have found an Exosolar planet.
-The top of a wavelength is called a crest and the bottom a trough.
2) Astrometry Method
- Looks at the wobbling of a star
- Star wobbles because gravity affects it
3) Transit method
- Most surefire method
- Both Earth and solar system based
- Watches the changing brightness of a star
We also had a very cute visitor from 3rd grade named Alice. She came to observe our astronomy forum class for the last 20 minutes. The class introduced themselves and their planets to Alice while we continued the forum.
Homework & Upcoming events
April 23rd : second blogger comment for the 4th quarter is due!
April 27th at 8 AM: The fifth APOD for this unit any date from 2000-2010 may be used! Also, next week is the last APOD that will be due for science this year!
April 28th : Celestial Body test study session at lunch
April 29th : open note Celestial Body Test
April 30th : third blogger comment due
May 4th or 7th: A friend of Mrs. Sprljan may come in to talk to us about astromomy. He specializes in wormholes and Black holes.
May 11th : Chemistry unit starts
May 14th : Extra credit due. Each picture next to a planet is worth 2 points. The planets which count as extra credit are Saturn, Uranus, Neptune and Pluto. Email these pictures to firstname.lastname@example.org or email@example.com for extra credit. Good luck!
Here are the maps for the extra credit assignment: http://www.phy.hr/~mpozek/planeti/
Hebrew: Ohevet otchem kulam (Love ya guys) and good luck (:
Next scribe is Emma
Wednesday, April 21, 2010
With the second guide we explored mining and the use of electircty against physical power. As a demonstration Where Holly ran in this huge hamster wheel and about 5 boys were ment to stop her. As we moved on we saw how there was a patern of development, how everyday things got simpler and simpler. Then We got to the old car engines and the guide demonstrated how some of the first cars used leavers to get the engine started he also mentioned how most people drove themselves over because they had their car left in 1st gear so it would just drive over them. Then we saw some other intresting things. But finally the mining part came he showed us how they made 12 year old boys work in mines because of the low hight of the mine. And also how they would have mules which would not sea day for their full lives. He introduced the diffrent tools such as pick-axes, shovels. And how the miners needed to work 8 hours a day with the exeption of sunday. He lead us into a artifical mine beneath the museum which was not high at all and most of us needed to crouch. We saw a two meter block of rock missing in part of the wall he explained to us how a miner needs to dig that much within 3 hours and how there was no talking and lunch was 30 minutes. The miners ussually watched for mice running because if they ran that ment danger aslo they carried candels in the mines to see what gasses were down there somtimes its would blow up everything and somtimes it would turn off. As the guide was taking us through the last part of the tour he said that there was water driping from the seelings and how there was dust everywhere and the sound of drills pierced your ears.
Sunday, April 18, 2010
Here is a list of the symbols of the Celestial Bodies:
Here are some notes that we had discussed:
All the terrestrial planets are: Mercury, Venus, Earth, and Mars
All the gas planets are: Jupiter, Saturn, Neptune, and Uranus
The Sun has the longest revolution in our solar system
Mercury is the smallest planet
Venus is the biggest object we see in the sky from Earth (with the exception of the Sun and the Moon) because the atmosphere bounces off the light from the Sun
Venus is a good example of global warming
Venus rotates clockwise while all the other planets rotate counter clock wise
The Earth’s atmosphere is made of oxygen, hydrogen, carbon dioxide, nitrogen, H2O, O3, and Methane
The Earth’s land is made of: basalt, and iron
Saturn is the least dense planet in our galaxy
Galileo who discovered the rings of Saturn thought that they were the planets ears
is still orbiting around Saturn and taking the best pictures
ever taken of Saturn
Saturn has 62 moons however 53 moons have been named until now
Jupiter is the biggest planet
Jupiter has the 4 biggest moons
The first name of Uranus was called Georgium Sidus
(The Georgian Planet) in the honor of the British King; George III
Uranus has no magnetic field
The Methane in the atmosphere makes Neptune and Uranus blue
Eris is the biggest dwarf planet in our solar system
Haumea is the smallest dwarf planet in our solar system
Eris is the reason why Pluto isn’t a planet anymore because once they found Eris they knew it wasn’t supposed to be a planet and then they saw the similarities between Eris and Pluto so they decided that they are both dwarf planets
Three reasons why dwarf planets are dwarf planets:
1. Clear orbital path around the sun day do not exist
2. They are too small
3. The orbital paths are not on the same place as the planets
Videos (Just Click on the title):
Don't forget to check moodle for homework!!!!
Next Scribe will be by: Jacob
Don't forget to comment!!!!