1. Day and Night

Understand how the movement of the Earth causes day and night and the apparent daily movement of the Sun.

กลางวันและกลางคืน

2. The Seasons and Day Length

Understand how the tilt and movement of the Earth causes the seasons.

ฤดูกาลและความยาวของวัน

3. Year Length

Learn that a year is the time it takes for a planet to orbit the Sun and that a year on Earth is 365.25 days. Understand why planets further from the Sun have a longer year.

ความยาวของปี

4. Gravity

Learn that gravity is a force of attraction which acts on Earth towards the centre of the planet, and that the size of the force of gravity depends on the mass of each object and the distance between them.

แรงโน้มถ่วง

5. Gravity and the Solar System

Understand how the movement of planets around the Sun is related to gravitational forces.

แรงโน้มถ่วงและระบบสุริยะ

6. Satellites

Learn that the moon is a natural satellite of the Earth and how satellites stay in orbit around the Earth.

ดาวบริวาร

7. Uses of Satellites

Learn some uses of artificial satellites.

ประโยชน์ของดาวเทียม