
✦ Force & Pressure
Force: a push or pull
Unit: Newton (N)
Pressure formula:
[ \text{Pressure} = \frac{\text{Force}}{\text{Area}} ]
Smaller area → more pressure
Larger area → less pressure
✦ Cell Structure
Site of chemical reactions
3. English Grammar — Quick Revision
✦ Simple, Compound, Complex Sentences
Simple: 1 independent clause
I finished my homework.
Compound: 2 independent clauses + conjunction
I finished my homework, and I watched TV.
Complex: 1 independent + 1 dependent clause
I finished my homework because I had time.
✦ Active → Passive Voice
Active: The teacher explained the lesson.
Passive: The lesson was explained by the teacher.
Formula:
Object + was/were + past participle + by + subject
� 4. Literature — How to Write a Perfect
Answer