We begin with four questions...

1. A little seed weighs next to nothing but a tree weighs a lot. From where does the tree get the stuff that makes up a wooden desk?

2. Can you light a little torch-bulb with a battery, a bulb and one piece of wire?

3. Why is it hotter in summer than in winter?

4. Could you scribble a plan diagram of the solar system showing the shape of the planets' orbits?

more..

Homework

How does an aircraft's wing create lift?
[Ensure you explain how planes fly upside down]

Why is the sea blue?
[And why is it blue on cloudy days]

Gaiaia think

보편적이고 근본적인 자연과학에 대한 지식은 전체적인 맥락과 논리만 정확하다면 회상 가능하다.

멋대로 오해해서 기억하고 있는 게 아니라면...

지식은 구체적인 사실보다 개념이 더 중요하다.

PS. 중간 내용은 쓰다가 날라갔다.. 아 짜증나..