Monthly Archives: October 2016

Space Rock BTN

Here is the link to the video: http://www.abc.net.au/btn/story/s3693796.htm

Blue: Facts

Red: Understandings

Green: Questions

 

On the 26/2/2013, a massive meteor explosion took place right over Russia. The same day an asteroid passed really close to earth, though these 2 events weren’t linked. This article is about the difference between asteroids, meteors and comet.

We live on the planet earth, and the way we live is pretty decent. There’s water, oxygen, the weather isn’t too cold or too hot, we can breathe fresh air and create buildings, and we can even have picnics! But were not the only planet or rock out there in our solar system, and that’s where asteroids, comets and meteors come in.

This meteor that hit Russia was in the Ural Mountains and it no one expected it. It strike through the atmosphere and exploded above a city called Chelyabinsk. The force it made was 20 times bigger than an atomic bomb, but since it was so high in the sky the effects on ground weren’t devastating. But the shockwave blew out the windows, damaged buildings and injured more than a thousand people. As this event occurred, astronomers watched an asteroid half the size of a football field passed closely by earth.

These 2 events weren’t connected at all, but they did get people talking about what’s really going on in space. See, there are more things in our solar system than the planets that orbit the sun.  There are chunks of dust, rock and ice in our solar system (which are the leftovers from the process that formed the planets billions of years ago). These are called asteroids, meteoroids and comets.

Comets are chunks of ice and dust which are from the cold outer parts of the solar system. When they get close to the sun they start to melt, therefore giving off a gas that looks like a beautiful glowing trail.

Asteroids are normally made of rock or metal. Tens of thousands of them are located in an area in the solar system called the asteroid belt (which is between Mars and Jupiter) but some travel closer to Earth.

Meteoroids are a smaller version of asteroids, and millions of them hit the Earth’s atmosphere every day. When they enter the atmosphere, we change the name to meteors. Most meteors burn up really quickly when they hit the atmosphere, and if you’ve ever seen a shooting star, that’s a meteor.

This meteor that flew over Paris was bigger than most meteors, and because it was made of the things it was made of, it didn’t explode straight away. It exploded when it hit thicker air, and this has happened in Russia before. In 1908, scientists believe that a massive meteor exploded above a place called Tunguska. Nothing from the meteor reached the ground, but the force of it knocked down kilometers of trees. But when a meteor does hit the round, we call it a meteorite.

When we do get meteorites, they can be very valuable. This is because they give more knowledge to scientist to find out what’s going on in space, and to be able to touch a rock from space that is billions of years old, it would be amazing!

Damaging meteor/meteorites events on earth are rare, but they can happen. A lot of scientist believe that one reason why the dinosaurs became extinct (over 66 million years ago) was because of a meteorite. But scientist also believe that this type of event will probably not happen in our lifetime again, so humans are in no danger of meteors/meteorites. This is for astronomers spend a lot of time studying comets and asteroids, and finding things out like where they’re heading. Some can even send robotic spacecraft to study them up close, and they have different ways to protect the planet if one got to close. But these amazing comets, meteors and asteroids have a lot to teach us, and will teach us more about the ancient history of our solar system than ever in history.

 

An understanding I now have is:

Meteors, asteroids and comets are clearly linked but are they own different things, though we also could expand our knowledge on them (especially comets and asteroids).

 

2 questions I have are:

  1. What different ways can the robotic spacecraft (sent by astronomers) protect our planet?
  2. What equipment do astronomers, or even scientists, have to find out this information (besides the spacecraft)?

 

Space Video Reflection- Solar System

Here’s the video I did this report on:  http://antsclass.global2.vic.edu.au/2016/10/16/this-weeks-space-homework/

Key:

Blue: Facts

Red: Understandings

Green: Questions

 

This article is about our solar system and what we know about it (generally). The solar system is a series of objects that orbit the sun because of gravity. It consists of In consists of galaxies, planets, asteroids and many more. Our solar system is a tiny percent of what we call Space, which is enormous! Our solar system is located in a calmer part of the Milky Way, which all humans in our solar system live.

 

There are 8 planets in our solar system, which are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Each planet is either a gas planet or a terrestrial planet, but this doesn’t include the bunch of dwarf planets (I will expand on dwarf planets a bit later). Mercury, Venus, Earth and mars are terrestrial planets, but they are tiny compared to the gas planets Jupiter, Saturn, Uranus and Neptune (in fact these gas planets contain 99% of the mass of all the other planets combined!). Although these planets can be named into groups, they are very different. They can have different temperatures, weights, moons, weather, sizes, distance from the sun, and even simple things like the colour of the planet.  But there are still similarity’s about the planets like:

  1. Every planets has to be a sphere
  2. Every planet has cleared orbit
  3. All of the planets orbit the sun (Star Sol).

 

And all together, the planets make up 0.14% of our solar system.

 

 

Dwarf planets are also very different to each other and have categories, except theirs are based on where they are in the solar system. The two categories are the Asteroid Belt (the dwarf planets are between Mars and Jupiter), and the Kuiper Belt (the boundary of the solar system). In these belts are also the trillions of asteroids and comets in our solar system. The all circle the sun, and some examples of dwarf planets are Pluto, Ceres, Makemake and Haumea.  Ceres is the most known object in the Asteroid Belt, while Pluto, Makemake and Haumea are the best known objects in the Kuiper Belt. Although there are millions of objects in these belts, both are pretty empty. But the mass of these belts make up for it, the asteroid belt being 4% of the moons mass while the Kuiper belt is between 1/25 and 1/10 of Earth!

 

Another object in our solar system that is very important is our sun! It takes up 99.86% of our solar system mass, and it is made from mainly hydrogen, helium and less than 2% of oxygen and iron. The core of the sun consumes 620 million tons of hydrogen every second. Over the years the sun will get hotter and hotter, until when it get to the 500 million year make, the only thing that will remain in our solar system will be the 4 closest planets. Then the sun will melt each of the planets crusts, and the sun will get hotter. Then it will get so hot that it expands and swallows up these planets, or will turn them into a sea of lava. After the sun has done this, it will shrink into a white dwarf star and burn for a few billion years. Then the sun will die, and there will be no life in our solar system. The mankind in our solar system will be extinct, unless we leave and find somewhere else.

 

The solar system is so big that we haven’t even explored all of it yet. It has been around for 4 ½ billion years, and every year we learn something new about it. But we still haven’t developed the technology to find out everything about the solar system though we have found out a lot over the years.

 

I understand that we have found out so much about the solar system, yet we only have found out a tiny bit.

 

My Question is:

 When/will there be a time where we find out everything (or most things) about the solar system and will humankind still be there for it (the sun wouldn’t have swallowed us up)?

My 2 Question is:

When will we have the technology to discover everything (most things) about the solar system, and what will this technology do?

 

 

 

Space Video Reflection

This week, instead of a BTN video we could write a 321 reflection on a video about space (since space is our topic for this term). Hope you enjoy!

If you want to see the video, its on a blog called antsclass. Go check it out!

Blue = Facts

Red = Understandings

Green = Questions

 

This science video is about how ancient humans were fascinated by astronomy and how they talked about it then and now. The three main races that looked into astronomy the most were Mayans, Babylonians and Ancient Greeks. These 3 races discovered so much about astronomy and made us understand space a whole lot better. Especially Babylonians, they very advanced astronomers (and very interested in space) since they had created a writing system that allowed them to record a lot of information about space. This system helped Babylonia create mathematical models like calendars and these type of things were very helpful to them back then. Especially in the city-state of Ancient Babylon, which is located near modern Baghdad. These smart Babylonians were also able to predict astronomical phenomena, although they didn’t see things in a scientific standpoint. But their work has influenced astronomy and has created the birth of early forms of modern horoscopic astrology.

The race of Mayans is a group of Mesoamerican Indians. Even present day, we still don’t know a lot about this race and their knowledge about astrology (since the Spanish Conquistadors burned all of their records). But a very famous creation was from the Mayans, and that was the Mayan Long Count Calendar.  This calendar was a very sophisticated system that uses base 20 numbers. This calendar is very famous because the Mayans believed that the world was going to end on the 21st of December 2012 (since that was when the calendar ended). This prediction was incorrect, so that means that Christmas and New Year’s Eve could be celebrated! Although the prediction was incorrect, it helped the Mayans discover the eclipse which was used to prognosticate important events, as well as predicting things like the motion of the planets.

The last race that was very interested in astronomy was Ancient Greece. A very famous ancient astronomer from Greece was called Claudius Ptolemy who invented the Ptolemaic system. This astronomer was a Greco-Egyptian writer, mathematician, astronomer, geographer, astrologer and poet of a single epigram in the Greek Anthology. Ptolemy had a lot of jobs because at the time (90 AD – 168 AD), there wasn’t that much knowledge about science so people interested in science had to have a lot of other jobs. But nowadays, there is more knowledge about science therefore you can just focus on science if you want to.

Claudius was also a Greek citizen of the Roman emperor, and was born in ancient Egypt in Alexandria (when it was under a Roman emperor).  This Ptolemaic system showed how earth was in the middle/centre of the universe, and this fact has influenced humans for hundreds of years. This system was a drawing that shows earth was in the centre of the universe, but Ptolemy was known largely for it. But knowledge today is showing that heaps of Ptolemy’s knowledge actually came from another person,

Euclid (father of Geometry) who is an ancient Greek mathematician and a lot of people would say the greatest astronomer of all time. He categorised hundreds of stars, as well as discovering the Precession of the Equinoxesa (the wobbling of the earth around its axis). This Precession explains why in 12 000 years, the northern star won’t be Polaris anymore, it will be Vega.

An understanding I now have is some of our science knowledge was found out years ago, and a lot of our knowledge id from people in the past. Also that the knowledge we got from the past has really influenced us on our opinion of space.

2 questions I have now are:

  1. Who created the Mayan calendar or the Babylonians calendar?
  2. How did they find out all of this information when they didn’t have the technology we have today?

Science (Space) Goals/ Cosmic Discovery Goals

Science Understanding (Science as a human endeavor):

How does humans working in space help communities decide and solve problems relating to people’s lives?

 

Earth and Space Science:

Which planets can humans live on, why and what would be the main differences between these planets and Earth?

 

Science Inquiry Skills:

When taking notes about space life and the planets, I can summaries so it won’t be as confusing.

Reflection on Report Goals

 

Have I achieved my goals?

Starting with Literacy, I believe I have achieved this goal really well. I have constantly put this as one of my goals, but now I feel that I have achieved it. This is simply because I tend to write different texts for my 100wc, and I even started to include some facts. There are also times at home when I would think of an idea for a piece of writing, but normally make it a narrative. Now I try to put the idea into a different type of text, and I make them different every time. For example, I could think of something very simple (on the 1st week of holidays I thought of a story about an asthmatic) but instead of making it a narrative, I chose to make it an instructional text of how to use the puffer (with my sister’s help). Sometimes I won’t finish the piece, but most of the time it’s because I don’t like the idea anymore or the genre doesn’t fit the type of text. Another way I know I have achieved this goal is that I am improving in my other types of text, especially poetry and persuasive text (which I use for debates). So I believe that since I have improved, practiced and now have a bigger interest in different types of writing, I feel that I have achieved the goal.

 

Next is maths, which has been the hardest goal so far. I do know how to multiply the 2 decimals, though I not very confident and I still can have trouble with the decimal point. I have been trying to achieve this goal in simple things like hotmaths and at home. Hotmaths is compulsory, and all I really do is try to answer the question that is shown. But at home, sometimes I will ask my mum for random numbers (most of the time she doesn’t know what I’m talking about) and put them into 2 decimals and try to solve the multiplication. After I’m sure with my answer, I will go onto the calculator and see whether its correct. I still get tripped up with the decimal point, and I’m still no very confident so I believe I can still improve in this goal.

 

My personal goal was to be more organised with my work, and I believe that has been the only goal I can say that I was already halfway there. I needed to improve on this goal, since I had a lot of books (from school and home activities) and I needed the right ones. Since I always have the right books for when I get to school to my classroom as well as completing my homework every week, I didn’t quite work on that part. I worked on being more organised in my book, so every time someone would need to look at a part, I could just point at it. Everyone uses sub headings for there book, but I used to still have to skim and scan. Now, I know the parts I will need to look at, so I make paragraphs or just on its own sentences, as well as putting astricts or stars next to it. I believe I have achieved this goal, though I will still remember to make the work inside my book as clear as possible (since there are days that I need to remind myself).

 

 

FUTURE GOALS:

 

I believe that I still need to work on my second goal about maths. I’m still not as confident as I hope I can be, as well as not understanding the multiplication some of the time. If I can continue with this goal till the end of the year, then I will become more confident and will not be confused about the decimals place. Also, since I haven’t completed my goal yet, I need to try to achieve it since it is a goal.

 

My second goal is new, and will be to work on my angles. I do know how angles work and I do know a bit about them, though the main things is I’m not confident. I do know most angles and what there are called (and their degree), but when it comes down to comparing which angles are which, I can often get confused. Therefore, if I work on this (which we will be doing in class), I feel that I will be more confident in myself, it will be less complicated to and I will solve the problem quicker. This will also make me more confident when helping other classmates in decimals, and I will have less fear that I am wrong (I still help classmates now, though I double check a lot before they believe they have the answer).

 

My last goal is to summarise more efficiently and to use summarising more often. Sometimes you need to get the point you’re saying across in as few words as possible, so that it’s easier to read and understand. This goal out of all 3 of mine is the one I have to work on the most, but will be the most rewarding for when I complete it (since I’m preparing for high school)