Biology
What is the largest land animal?
African elephant
What is the third planet counted from the sun?
Earth
A natural body that revolves in an orbit around a star
A planet
Define a force
A push or a pull acting on an object.
What are the vertical columns in the periodic table called?
Groups
What organelle is known as the powerhouse of the cell?
Mitochondria
What molecule carries genetic information in most living organisms?
DNA
A long term weather patterns
Climate
A 5 kg object accelerates at 3 m/s². What is the net force acting on it?
F = ma = 5 × 3 = 15 N
What element is used in thermometers and is toxic to humans?
Mercury
What is the primary function of red blood cells?
To transport oxygen
What is the smallest unit of life? State at least three organelles in it.
Cell
The process when leaves on trees use sunlight for energy production
Photosynthesis
What happens to current when resistance increases (with constant voltage)?
Current decreases (inverse relationship).
Hydrogen
What is the primary pigment in plants that captures sunlight for photosynthesis?
Chlorophyll
What is the pH of a neutral substance, like pure water?
7
A naturally occurring raw material or form of energy that can be replenished over time naturally.
Renewable
How old is the Universe?
13.8 billion years
What is the common name for dihydrogen monoxide?
Water
What is the largest organ in the human body?
Skin
What is the most abundant gas in the Earth’s atmosphere?
Nitrogen gas
A description, analogy or a simplified representation of something that helps us understand it better
Model
Describe the difference between kinetic and potential energy with real-life examples.
Kinetic = motion (e.g., moving car);
Potential = stored (e.g., stretched bow).
What is a salt in chemistry?
The product of a reaction in between acid and base
Which organ in the human body produces insulin?
Pancreas
What element is present in all organic compounds?
Carbon
The role of an organism in nutrient and energy flow within an ecosystem
Trophic levels
State Newton’s First Law and explain it.
Objects stay in motion/rest unless acted on.
E.g., a car stops suddenly and passengers jerk forward due to inertia.sublimation
Why alcohol evaporates faster than water?
Because intermolecular forces are weaker in alcohol than in water.