Objective questions and answers on core science

Here are some objective questions and answers on core science topics:

1. What is the powerhouse of the cell?

   • Answer: Mitochondrion

2. Which gas is essential for photosynthesis?

   • Answer: Carbon dioxide

3. What is the unit of force?

   • Answer: Newton

4. The chemical symbol for water is:

   • Answer: H₂O

5. What process involves the movement of water across a semipermeable membrane?

   • Answer: Osmosis

6. What is the law that states energy cannot be created or destroyed, only transformed?

   • Answer: The Law of Conservation of Energy

7. Which part of the plant absorbs sunlight for photosynthesis?

   • Answer: Chlorophyll (in chloroplasts)

8. What is the resistance of a conductor measured in?

   • Answer: Ohms

9. What is the basic unit of heredity?

   • Answer: Gene

10. What is the process by which organisms with traits better suited to their environment tend to survive and reproduce more offspring?

    • Answer: Natural selection