Getting Started (LB pg 136):

1) A globe

2) The Earth's axis

3) The Earth spins once every 24 hours on its axis

Earth's orbit

• Shape of the orbit: slight ellipse

• Shape of the Sun, Earth, and Moon: sphere

• Average distance between Earth and Sun: 150 million km

• Direction that the Earth moves around the Sun: Anticlockwise direction

• Duration for Earth to complete its orbit around the Sun: 365.25 days or 1 year

• Length that Earth travels around the Sun: 940 million km

• The Sun exerts a bigger gravitational force on the Earth

Think Like A Scientist (LB pages 137-138)

1. The Earth orbits around the Sun & the orbit is slightly elliptical.

2. The scale is not accurate.

3. It is not a perfect circle.

4. Gravity

5. The Earth is turning on its axis.

6. A leap year where there is an extra day in February, every four years.

The Seasons (LB pg 138-141)

1. Seasons: spring, summer, autumn, and winter

2. YouTube video: https://www.youtube.com/watch?v=4HeeCYVqf3U

3. Northern Hemisphere: countries between the Equator and the North Pole

4. Southern Hemisphere: countries between the Equator and the South Pole

5. When the Northern Hemisphere has summer, the Southern Hemisphere has winter

6. In summer, the days are long while the nights are short

7. In the Equator, we have equal day and night = no seasons.

8. Opposite of winter = summer

9. Opposite of fall/autumn = spring

10. Activity 1 page 139

11. Different seasons in different parts of the world

    1. Day: side of Earth facing the Sun

    2. Night: the side of the Earth facing away from the Sun

    3. The length of the day is different in the northern hemisphere, the equator, and the southern hemisphere

12. Activity 2 page 140

13. Homework: workbook pages 84-88