Q1. What is the chemical symbol of Oxygen?
Explanation: The symbol ‘O’ represents oxygen in the periodic table.
Q2. Which planet is known for having rings around it?
A. Jupiter
B. Uranus
C. Neptune
D. Saturn ✅
Explanation: Saturn has beautiful and well-defined rings made of ice and rock particles.
Q3. What is the basic unit of life?
A. Atom
B. DNA
C. Cell ✅
D. Tissue
Explanation: The cell is the smallest living unit that carries out all life processes.
Q4. Which vitamin is known as the “sunshine vitamin”?
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D ✅
Explanation: Vitamin D is produced in the skin when exposed to sunlight.
Q5. What part of the atom has a positive charge?
A. Neutron
B. Electron
C. Proton ✅
D. Nucleus
Explanation: Protons are positively charged particles in an atom’s nucleus.
Q6. Which gas do we breathe in that is essential for life?
A. Hydrogen
B. Carbon dioxide
C. Oxygen ✅
D. Nitrogen
Explanation: Oxygen is essential for cellular respiration in humans and animals.
Q7. How many planets are in the Solar System?
Explanation: There are 8 planets; Pluto is now classified as a dwarf planet.
Q8. What is H₂O commonly known as?
A. Hydrogen
B. Oxygen
C. Water ✅
D. Salt
Explanation: H₂O is the chemical formula for water—2 hydrogen and 1 oxygen atom.
Q9. What organ pumps blood throughout the human body?
A. Brain
B. Liver
C. Heart ✅
D. Kidney
Explanation: The heart pumps blood through a network of arteries and veins.
Q10. What type of energy is stored in a battery?
A. Thermal
B. Chemical ✅
C. Nuclear
D. Light
Explanation: Batteries store chemical energy, which is converted into electrical energy when used.