Author: Mauvin Sequeira

1. What is the primary cause of global warming?
(a) Deforestation
(b) Increased volcanic activity
(c) The natural Earth cycle
(d) Increased greenhouse gas emissions

2. Which of the following is a renewable energy source?
(a) Coal
(b) Natural gas
(c) Solar power
(d) Nuclear power

3. Which layer of the atmosphere contains the ozone layer?
(a) Troposphere
(b) Stratosphere
(c) Mesosphere
(d) Thermosphere

1. What is the largest planet in our solar system?
(a) Earth
(b) Jupiter
(c) Saturn
(d) Neptune

2. Which planet is known as the Red Planet?
(a) Mars
(b) Venus
(c) Mercury
(d) Jupiter

3. What is the closest star to Earth?
(a) Sirius
(b) Betelgeuse
(c) The Sun
(d) Proxima Centauri

1. Which of the following is a pure substance?
(a) Air
(b) Salt water
(c) Iron
(d) Sugar solution

2.The smallest particle of an element that can exist independently is called:
(a) Molecule
(b) Atom
(c) Ion
(d) Electron

3. The process of converting a solid directly into a gas is called:
(a) Sublimation
(b) Evaporation
(c) Condensation
(d) Melting

1. Which of the following is a scalar quantity?
(a) Velocity
(b) Acceleration
(c) Force
(d) Speed

2. Newton’s second law of motion is expressed as:
(a) F = m/a
(b) F = ma
(c) F = a/m
(d) F = m – a

3. The unit of work is:
(a) Joule
(b) Newton
(c) Watt
(d) Kilogram

1. The basic unit of life is:
(a) Cell
(b) Tissue
(c) Organ
(d) Organ system

2. The process by which plants convert sunlight into energy is called:
(a) Respiration
(b) Photosynthesis
(c) Digestion
(d) Excretion

3. The control center of a cell is the:
(a) Cell membrane
(b) Cytoplasm
(c) Nucleus
(d) Mitochondria