AA Natural Sciences 1 — Questions and Answers
Question 1: What is the basic unit of life?
- Cell (Correct answer)
- Atom
- Molecule
- Tissue
Correct answer: Cell
The cell is the smallest structural and functional unit of all living organisms.
Question 2: Which planet in our solar system has the most moons?
- Saturn (Correct answer)
- Jupiter
- Neptune
- Uranus
Correct answer: Saturn
As of recent discoveries, Saturn has over 140 confirmed moons, the most of any planet in our solar system.
Question 3: What process do plants use to convert sunlight into food?
- Photosynthesis (Correct answer)
- Respiration
- Fermentation
- Transpiration
Correct answer: Photosynthesis
Photosynthesis uses sunlight, water, and carbon dioxide to produce glucose and oxygen.
Question 4: What is the chemical formula for water?
- H₂O (Correct answer)
- CO₂
- NaCl
- O₂
Correct answer: H₂O
Water consists of two hydrogen atoms bonded to one oxygen atom, giving the formula H₂O.
Question 5: Which gas makes up the largest percentage of Earth's atmosphere?
- Nitrogen (Correct answer)
- Oxygen
- Carbon dioxide
- Argon
Correct answer: Nitrogen
Nitrogen makes up approximately 78% of Earth's atmosphere, far more than oxygen at about 21%.
Question 6: What type of rock is formed from cooled magma or lava?
- Igneous (Correct answer)
- Sedimentary
- Metamorphic
- Crystalline
Correct answer: Igneous
Igneous rocks form when molten material (magma underground or lava above ground) cools and solidifies.
AA Natural Sciences 1
What is the basic unit of life?