General Science
What gas do plants absorb from the atmosphere for photosynthesis?
Carbon dioxide (CO₂)
What is the process by which green plants convert sunlight into chemical energy?
A) Respiration
B) Photosynthesis
C) Fermentation
D) Transpiration
B. Photosynthesis
What is the term for a substance that cannot be broken down into simpler substances by chemical means?
A) Compound
B) Element
C) Mixture
D) Solution
B. Element
What is the unit of force in the International System of Units (SI)?
Newton (N)
What is the layer of Earth that is composed primarily of solid rock and is located directly beneath the soil and water?
A) Mantle
B) Crust
C) Bedrock
D) Core
C. Bedrock
What force keeps objects bound to the Earth?
Gravity
The structure in a cell that contains the genetic material (DNA)
Nucleus
What is the pH value of a neutral solution at 25°C?
A) 5
B) 7
C) 9
D) 10
B. 7
What principle states that an object in motion will remain in motion unless acted upon by an external force?
Newton's First Law of Motion (or the law of inertia)
What is the term for the movement of tectonic plates that can cause earthquakes?
Plate tectonics
The protein that helps in the clotting of blood by forming a mesh to stop bleeding
Fibrin
The process by which a cell divides to produce two identical daughter cells.
Mitosis
Which law states that the volume of a gas is directly proportional to its temperature when pressure is held constant?
Charles's Law
What is the term for the energy possessed by an object due to its motion?
A) Potential energy
B) Thermal energy
C) Chemical energy
D) Kinetic energy
D. Kinetic energy
What is the primary gas found in the Earth's atmosphere?
Nitrogen (N₂)
What is the fundamental force responsible for the interaction between charged particles?
A) Gravitational force
B) Electromagnetic force
C) Nuclear force
D) Frictional force
B. Electromagnetic force
The structure that regulates the passage of substances in and out of a cell.
Cell membrane (or plasma membrane)
What type of reaction involves the transfer of electrons between substances?
Redox reaction (or oxidation-reduction reaction)
What phenomenon occurs when light waves change direction as they pass from one medium to another?
Refraction
What type of rock is formed from the cooling and solidification of magma or lava?
A) Sedimentary rock
B) Metamorphic rock
C) Igneous rock
D) Fossil rock
C. Igneous rock
The layer of Earth’s atmosphere that contains the ozone layer
Stratosphere
What is the primary pigment found in plants that captures light energy for photosynthesis?
A) Chlorophyll
B) Carotene
C) Xanthophyll
D) Anthocyanin
A. Chlorophyll
What is the chemical formula for table salt?
NaCl (sodium chloride)
What is the equation that relates the force, mass, and acceleration of an object?
A) F = ma
B) E = mc²
C) P = F/A
D) W = Fd
A. F = ma (Newton's Second Law of Motion)
What is the term for the process by which rocks are broken down into smaller pieces through weathering and erosion?
Sedimentation