YEAR 4 CHAPTER 9: SOLAR SYSTEM

YEAR 4

CHAPTER 9: SOLAR SYSTEM

Objectives of the topic learning:

1. Student able to identify the members in solar system.
2. Student able to arrange planets in solar system.

This content are attached with pictures and videos for the students to learn.

Topic that will be learn: 

1. Solar System

1. Sun

• The Sun is a yellow dwarf star, a hot ball of glowing gases at the heart of our solar system.
• The size of the sun is 100 times bigger than the size of our earth and 400 times bigger than the size of moon.
• The size of the earth is four times bigger than the size of the moon.
• Diameter of the sun is 1 400 000 km, the diameter of the earth is 12 756 km and the diameter of the moon is 3 480 km. 

      2. Planets

• There eight planets that orbiting the sun. 
• Each of the planets has it own characteristics.

Planets in solar system

(video from YouTube, Planets in solar system)

Link: https://youtu.be/libKVRa01L8

     3. Natural satellite

• Natural satellite is a n object that orbiting a planet.
• All planets has it own natural satellite except for Mercury and Venus.
• Moon is the natural satellite.

    4. Asteroid 

• Asteroid is a large piece of rock that orbiting the sun.
• Most of the asteroids orbits in asteroid belt.
• It is made up of rocks and metals.

     5. Meteoroid

• Meteoroid is a broken piece of asteroids and comets.
• Meteoroid floating and orbiting in outer space.
• It is smaller in size.

     6. Comet

• Comets are cosmic snowballs of frozen gases, rock and dust that orbit the Sun.
• Its orbiting the sun in a large orbit.
• Comet not emitting a light.
• Its only glowing when entering the solar system.
• In 1986, the European spacecraft Giotto became one of the first spacecraft ever to encounter and photograph the nucleus of a comet, passing and imaging Halley's nucleus as it receded from the sun.
• Halley's comet are about 15 kilometers by 8 kilometers. It is one of the darkest, or least reflective, objects in the solar system.