November Topics, Evaluation Criteria and homework 1 15/10/18 - 19/10/18 3rd Grade, section II and III

3rd Grade, section II and III Astronomy Science

          Stars, Galaxies and the Universe

• ·          Stars
• ·         Describe how color indicates the temperatura of  a star
• ·         Explain how a scientist can identify a star’s composition
• ·         Describe how scientist classify stars
• ·         Compare absolute magnitude with apparent magnitude
• ·         Identify how astronomers measure distances from Earth to stars
• ·         The Life Cycles of Stars
• ·         Describe different types of stars
• ·         Describe the quantities that are plotted in the H-R diagram
• ·         Explain how stars at different stages in their life cycle appear on the H-R diagram

Evaluation  Criteria

1. Classwork 40%

2. Speaking Ability 20%

3. Homework: 20%

4. Quiz: 20%

Write the information below, make two questions, answer them on your notebook and illustrate the topic.  

Color

A star's color depends on its surface temperature. Cooler stars tend to be redder in color, while hotter stars have a bluer appearance. Stars in the mid ranges are white or yellow, such as our sun. Stars can also blend colors, such as red-orange stars or blue-white stars.

Brightness

Two characteristics define brightness: luminosity and magnitude. Luminosity is the amount of light that a star radiates. The size of the star and its surface temperature determine its luminosity. Apparent magnitude of a star is its perceived brightness, factoring in size and distance, while absolute magnitude is its true brightness irrespective of its distance from earth.