Tuesday, February 14, 2012

Do Now: Stars Spectra

What does the surface color of a star tell us? Explain in detail. Then explain what is an absorption spectra.





Sources of continuous, emission, and absorption spectra




Sources of continuous, emission, and absorption spectra



http://csep10.phys.utk.edu/astr162/lect/light/absorption.html
Thus, emission spectra are produced by thin gases in which the atoms do not experience many collisions (because of the low density). The emission lines correspond to photons of discrete energies that are emitted when excited atomic states in the gas make transitions back to lower-lying levels.

A continuum spectrum results when the gas pressures are higher. Generally, solids, liquids, or dense gases emit light at all wavelengths when heated.

An absorption spectrum occurs when light passes through a cold, dilute gas and atoms in the gas absorb at characteristic frequencies; since the re-emitted light is unlikely to be emitted in the same direction as the absorbed photon, this gives rise to dark lines (absence of light) in the spectrum.

Friday, January 20, 2012

Blogging in Class


 

Blogging

Uses: Projects, journals, embed videos, keep track of conversations, post news articles, post homework, post review sheets, etc.


 

www.blogger.com (blogger is accessed through your gmail account. If you have a gmail then you can just login as yourself. If you don't then I have created an account for you.) When I use blogs in class, I have all students use a gmail account that I have created just for the purpose of the project – this gives me control over the content such that if an issue ever arose, I could go in and edit or delete a blog )

login: tvtscience2@student.tarbut.com

password – tvtentropy


 

Post Vs. Page – both can be changed at any time using the pencil or edit.

*you can also change the order of your posts by editing just the date box.

-posts move down the page in chronological order each new post at the top.

-Pages are static entities that in senescence act as a single post. They can be edited to make additions or changes whenever you like.


 

How to make a new page

Click – new post – then edit pages – then new page – then it asks you to name a location – I like my pages at the top of the page.


 

How to make a new post – click new post –

There is a edit HTML tab and a compose tab – when working in word click the compose tab. When working with embedding video click the edit HTML tab to copy and paste-


 


 

Embedding a YouTube Video

To embed a video from YouTube, just follow these simple steps:

  1. Click on the "Share" button underneath the YouTube video.
  2. Select "Show more," and then click on the Blogger icon.
  3. Depending on whether or not you're signed in to your blog, you might have to enter in your username and password in the new window that pops up.
  4. At the top of the new window, choose the blog you would like to post to from the drop-down menu.
  5. Publish your post!

*THIS IS THE METHOD I USUALLY USE***

Alternatively, you can copy the embed code and paste it into your blog. Just click on "Share" and then on "Embed" to find the embed code. Copy the code, then paste it into your blog while on the "Edit HTML" tab (as opposed to the "Compose" tab).

Posting pictures

You can now upload photos to your blog(s) using Blogger Images; just click the image icon in the post editor's toolbar.


When you click this icon, you'll get a window that allows you to select an image or multiple images from your computer. Click the Browse button to locate the ones you want. Alternatively, you can enter the URL of an image that's already online and insert it into your post.


If you click the link to choose a layout, you can customize the way your images will appear in your post:


The left, center and right options determine how the text of your post flows around the pictures. The size option lets you scale the pictures to different sizes within this posting area. Note that the picture will still be uploaded in its full size; this option just determines how it's scaled within the content of your post.


 

Adding an RSS Feed:

RSS stands for really simple syndication – they are generally sites that are updated regularly.

In the design tab – choose add a gadget – then scroll down to the RSS Feed gadget.

Copy and paste in the address for the RSS feed. Ex: Science News Daily –

RSS feeds normally look like one line of a web address.

You could always Google search your topic and RSS


 

WORKING DIRECTLY FROM WORD Document without ever having to log in. You can also open old files and just send them directly to your blog.

On word when you choose FILE NEW- you can choose blogpost.

  • Choose manage accounts – enter the data necessary to have your accounts accessible from word. You can just post straight from word. WORD!
  • All you need do is copy and paste the document into a blogpost and click submit


 


 


 


 


 

Ideas for blogs:

Post homework, review sheets 

Post videos and have students comment 

Post student work 

Post interesting photos of art and have students comment 

Post youtube videos of different parts of a song 

Post garage band performances 

Post links for research projects

Post math word problem of the day 

Post photographs from classroom reenactments 

Post links to current events 

Post links to podcasts about a certain topic 

Have students keep a journal about…. 

Have students keep their science log about….

Have students create a awareness about….. 

Have students collaborate about….. 

 


 


 

Notes:


 


 

Wednesday, January 18, 2012

Honors Science: Ten-second dance of electrons is step toward exotic new computers

Ten-second dance of electrons is step toward exotic new computers

Study Guide

Study Guide for Test on Chapter 17 and 18

  • Know the vocab
  • Study the Do Nows
  • Review all the homework questions – section reviews
  • Practice the chapter tests at end of chapter 17 and 18


 

Understand: sunrise, sunset, moonrise, moonset,

Be able to draw both types of eclipse

New Vocab:

Latitude

Longitude

Prime Meridian

Equator

Tropic of Cancer

Tropic of Capricorn

Arctic Circle

Oort Cloud

Kuiper Belt


 

Identify key ideas about the planets:

What is unique about venus's atmosphere?

What is unique about certain Jovian Moons?

Know the order of the planets.

Which planet has a strange tilt to its axis of rotation?

Why do the periods of revolution increase away from the sun but not the period of rotation?

Big Bang

What is the big bang? Explain its meaning and significance-

What happened right after the big bang? Can anything travel faster than the speed of light?

What is the speed of light? What is a light year?

Explain theory for the formation of our solar system and the formation of our moon.


 

Honors:

Be able to do black hole math for radius of a black hole

Be able to calculate using speed of light and AU

What is a black hole and what are the unique characteristics of them? How many are there out there in space? Can black holes combine? What is a supermassive black hole? How big would the black hole be made by something with the mass of our Sun, our Earth, or a 100 Kg human?

Sunday, January 8, 2012

Vocabulary Chapter 17 and 18


Chapter

Vocabulary

17.1

Nebula – nebulae

Solar system

Solar nebula

Planetesimals

Rotation

Revolution

Orbit

Period of revolution

Period of rotation

Keplers 1st law of motion

Kepler’s 2nd law of motion

Kepler’s 3rd law of motion

Gravity (what happens when the distance increases between objects)

18.1 and 18.2

Astronomical unit (au)

Terrestrial planets

Prograde rotation

Retrograde rotation

Gas giant

Outer planets

Solar eclipse

Lunar eclipse

18.3

Comet

Asteroid

Asteroid belt

Meteoroid

Meteorite

meteor

Aphelion

Perihelion

Chapter 19  We will have a separate test on Chapter 19.