1. Gravity discovered by?
A) Galileo
B) Newton
C) Einstein
D) Tesla
Answer: B) Newton
2. Human blood pH?
A) 6.4
B) 7.4
C) 8.4
D) 9.4
Answer: B) 7.4
3. Energy source of sun?
A) Chemical
B) Nuclear fusion
C) Electrical
D) None
Answer: B) Nuclear fusion
4. Eye part for image?
A) Cornea
B) Retina
C) Pupil
D) Lens
Answer: B) Retina
5. Largest bone?
A) Humerus
B) Femur
C) Tibia
D) Radius
Answer: B) Femur
6. Gas for burning?
A) CO₂
B) N₂
C) O₂
D) H₂
Answer: C) O₂
7. SI unit of length?
A) Centimeter
B) Meter
C) Kilometer
D) Millimeter
Answer: B) Meter
8. SI unit of mass?
A) Gram
B) Kilogram
C) Tonne
D) Pound
Answer: B) Kilogram
9. Plant respiration?
A) CO₂ use
B) O₂ use
C) N₂ use
D) None
Answer: B) O₂ use
10. Water freezes at?
A) 4°C
B) 0°C
C) 10°C
D) 100°C
Answer: B) 0°C
