AA Natural Sciences 2 — Questions and Answers
Question 1: Which organelle is known as the powerhouse of the cell?
- Mitochondria (Correct answer)
- Nucleus
- Ribosome
- Golgi apparatus
Correct answer: Mitochondria
Mitochondria produce ATP through cellular respiration, providing energy for cellular activities.
Question 2: What is Newton's first law of motion also called?
- Law of Inertia (Correct answer)
- Law of Acceleration
- Law of Action-Reaction
- Law of Gravity
Correct answer: Law of Inertia
Newton's first law states that an object at rest or in motion stays that way unless acted upon by an external force, which is the definition of inertia.
Question 3: Which of the following is a renewable energy source?
- Solar power (Correct answer)
- Coal
- Natural gas
- Petroleum
Correct answer: Solar power
Solar power is renewable because it is continuously replenished by the sun, unlike fossil fuels which are finite.
Question 4: What is the atomic number of carbon?
- 6 (Correct answer)
- 12
- 8
- 4
Correct answer: 6
Carbon has 6 protons in its nucleus, which is its atomic number.
Question 5: What phase of matter has a definite volume but no definite shape?
- Liquid (Correct answer)
- Solid
- Gas
- Plasma
Correct answer: Liquid
Liquids have a fixed volume but take the shape of their container because their particles can flow past one another.
Question 6: Which organ system is responsible for transporting blood throughout the body?
- Cardiovascular system (Correct answer)
- Respiratory system
- Digestive system
- Nervous system
Correct answer: Cardiovascular system
The cardiovascular system, consisting of the heart and blood vessels, circulates blood to deliver oxygen and nutrients.
AA Natural Sciences 2
Which organelle is known as the powerhouse of the cell?