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Cosmic Discovery- lesson 2: Classifying objects in the Solar System


 Solar GIF


I can classify objects in our solar system


Play with

Record & discuss interesting things you found out

New Info:

Today we will analyse our new information using CLASSIFICATION.

Use your ‘thinking skills outline table to check the steps in this process.

In 2006 Pluto was officially named a dwarf planet. This is because of the way Scientists have decided to classify ‘planets’.

The definition of planet set in Prague, Czech Republic in August 2006 by the International Astronomical Union (IAU) states that, in the Solar System, a planet is a celestial body which:

  1. is in orbit around the Sun,
  2. has sufficient mass to assume hydrostatic equilibrium (a nearly round shape), and
  3. has “cleared the neighborhood” around its orbit.

NASA  wants you to come up with a new way of classifying objects in our solar system

Classify: group similar items together based on similar traits

1. Name items to sort into groups– objects in our solar system- brainstorm- read & take notes on items using these websites:

2. Sort the items and say why they are in a group- how are objects classified at the moment?- make a table and put items into the table- eg.


3. Say how items could go into different groups- brainstorm what other ways we might group them

a new object object x was discovered outside ou

Goal reflection:

4. Tell what you know now (new idea) or could do with the information (new item)-What could be a different sorting system you could recommend to NASA? How might this system be useful?

If time, you may wish to discuss these:

the classification of the solar system

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