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WorksheetsNAT G12 Teacher-Made Reviewer [Set A]
Total questions: 100
Worksheet time: 2hrs 40mins
What is the basic unit of life?
Atom
Molecule
Cell
Tissue
Which of the following is NOT a part of the cell theory?
All living things are composed of cells.
Cells are the basic unit of life.
All cells arise from pre-existing cells.
Cells can form from non-cellular substances.
What is the function of ribosomes?
Energy production
Protein synthesis
DNA replication
Lipid synthesis
During which phase of mitosis do chromosomes align in the center of the cell?
Prophase
Metaphase
Anaphase
Telophase
What is the primary pigment involved in photosynthesis?
Carotenoids
Chlorophyll
Xanthophyll
Melanin
Which process converts glucose into energy in the absence of oxygen?
Photosynthesis
Aerobic respiration
Fermentation
Glycolysis
Which of the following is a characteristic of a prokaryotic cell?
Membrane-bound organelles
Nucleus
Circular DNA
Both A and B
What is the role of the mitochondria?
Photosynthesis
Energy production
Protein synthesis
DNA storage
Which type of RNA carries amino acids to the ribosome?
mRNA
rRNA
tRNA
snRNA
What is the function of the immune system?
Energy production
Nutrient absorption
Defense against pathogens
Hormone regulation
What is the atomic number of carbon?
6
12
14
16
Which type of bond involves the sharing of electrons?
Ionic bond
Covalent bond
Metallic bond
Hydrogen bond
What is the pH of a neutral solution?
0
7
14
10
Which of the following is an endothermic reaction?
Combustion
Photosynthesis
Dissolving salt in water
Rusting
What is the molar mass of water (H₂O)?
18 g/mol
16 g/mol
20 g/mol
12 g/mol
Which gas is produced during cellular respiration?
Oxygen
Carbon dioxide
Nitrogen
Hydrogen
What is the principle behind chromatography?
Density separation
Solubility
Molecular weight
Colorimetric analysis
Which of the following is a strong acid?
Acetic acid
Sulfuric acid
Carbonic acid
Citric acid
What type of reaction occurs when an acid and a base combine?
Synthesis
Decomposition
Neutralization
Combustion
What is the main component of natural gas?
Ethanol
Methane
Propane
Butane
What is Newton's first law of motion?
Force equals mass times acceleration.
For every action, there is an equal and opposite reaction.
An object at rest stays at rest unless acted upon by an external force.
Energy cannot be created or destroyed.
What is the unit of force?
Joule
Newton
Watt
Pascal
What is the formula for calculating kinetic energy?
KE = mv²
KE = 1/2 mv²
KE = mgh
KE = 3/2 kT
Which type of wave requires a medium to travel?
Electromagnetic waves
Sound waves
Radio waves
Light waves
What is the speed of light in a vacuum?
3.00 x 10⁸ m/s
3.00 x 10⁶ m/s
3.00 x 10⁷ m/s
3.00 x 10⁹ m/s
Which law states that energy cannot be created or destroyed?
Newton's First Law
Law of Conservation of Mass
Law of Conservation of Energy
Ohm's Law
What does the term 'frequency' refer to in wave mechanics?
The distance between wave peaks
The number of waves passing a point per unit time
The amplitude of a wave
The speed of a wave
What is the principle behind a lever?
Conservation of momentum
Mechanical advantage
Energy transfer
Friction
What is the phenomenon of light bending when entering a different medium called?
Reflection
Refraction
Diffraction
Absorption
In which type of circuit is the current the same at every point?
Series circuit
Parallel circuit
Open circuit
Short circuit
What is the outermost layer of the Earth called?
Mantle
Crust
Core
Lithosphere
Which process is responsible for the formation of mountains?
Erosion
Sedimentation
Plate tectonics
Weathering
What is the primary cause of earthquakes?
Volcanic activity
Human activities
Tectonic plate movements
Weather changes
What is the term for molten rock beneath the Earth's surface?
Magma
Lava
Granite
Basalt
Which layer of the atmosphere contains the ozone layer?
Troposphere
Stratosphere
Mesosphere
Thermosphere
What is the primary gas responsible for the greenhouse effect?
Oxygen
Carbon dioxide
Nitrogen
Methane
What is the process of water vapor turning into liquid called?
Evaporation
Condensation
Precipitation
Sublimation
What type of rock is formed from the cooling and solidification of magma?
Sedimentary rock
Igneous rock
Metamorphic rock
Fossilized rock
Which of the following is a major ocean current?
Gulf Stream
Amazon River
Nile River
Mississippi River
What natural phenomenon is measured by the Richter scale?
Tornadoes
Earthquakes
Hurricanes
Floods
What is the closest planet to the Sun?
Venus
Earth
Mercury
Mars
What is the largest planet in our solar system?
Saturn
Jupiter
Neptune
Uranus
What is the main component of stars?
Oxygen
Hydrogen
Carbon
Helium
Which celestial body is known as the 'Red Planet'?
Venus
Mars
Saturn
Jupiter
What is a black hole?
A type of star
A region in space with strong gravitational pull
A planet with no light
A type of comet
What is the name of our galaxy?
Andromeda
Milky Way
Triangulum
Whirlpool
What is the process by which stars produce energy?
Fission
Fusion
Combustion
Radiation
What phenomenon occurs when the moon passes directly between the Earth and the Sun?
Solar eclipse
Lunar eclipse
Supermoon
Equinox
What is the term for the orbit of a celestial body around another body?
Rotation
Revolution
Translation
Precession
What is the main source of energy for the Earth?
The Moon
The Sun
Geothermal energy
Fossil fuels
What is the primary function of a computer's CPU?
Store data
Execute instructions
Display graphics
Connect to the internet
Which programming language is primarily used for web development?
Python
Java
HTML
C++
What is the term for a computer network that spans a large geographical area?
LAN
PAN
WAN
MAN
What is the main purpose of an algorithm in computer science?
To store data
To provide a solution to a problem
To create graphics
To connect to the internet
What type of energy is generated by wind turbines?
Solar Energy
Mechanical Energy
Wind Energy
Electrical Energy
What does CAD stand for in engineering?
Computer-Aided Design
Computer-Aided Drafting
Centralized Application Development
Computer Automated Design
Purpose of a database?
To execute programs
To store and manage data
To display graphics
To connect devices
Which of the following is a renewable energy source?
Coal
Natural gas
Solar power
Nuclear energy
What is the process of creating a prototype in engineering?
Testing the final product
Designing a theoretical model
Producing a preliminary version of a product
Manufacturing the final product
What is the primary function of a circuit breaker?
To regulate voltage
To prevent electrical overload
To increase current flow
To store energy
What is the primary focus of environmental science?
The study of human behavior
The interaction between humans and the environment
The study of celestial bodies
The study of physical laws
What is the main advantage of using renewable energy sources?
They are less expensive
They can be depleted
They are environmentally friendly
They require advanced technology
What is the scientific method?
A process for conducting experiments
A way of organizing data
A method for writing scientific papers
A technique for teaching science
What is the primary purpose of peer review in scientific research?
To ensure accuracy and validity
To speed up publication
To increase funding
To promote collaboration
What is the term for a scientific explanation that is based on observation and experimentation?
Hypothesis
Theory
Law
Fact
Which of the following best describes the term 'biodiversity'?
The variety of life in a specific area
The number of species in a habitat
The genetic variation within a species
The interaction between organisms
What is the primary cause of the seasons on Earth?
The distance from the Sun
The tilt of the Earth's axis
The shape of the Earth
Ocean currents
What is the main component of the atmosphere?
Oxygen
Nitrogen
Carbon dioxide
Argon
What is the term for the study of interactions between organisms and their environment?
Biology
Ecology
Chemistry
Physics
Which of the following best describes the term 'sustainability'?
The ability to maintain ecological balance
The use of resources at a rapid pace
The increase of human population
The development of new technologies
What is the primary role of decomposers in an ecosystem?
To produce energy
To recycle nutrients
To compete for resources
To create food chains
What is the greenhouse effect?
The warming of the Earth due to trapped gases
The cooling of the Earth due to increased cloud cover
The increase in solar radiation
The decrease in atmospheric pressure
What is the primary purpose of conservation efforts?
To increase technology
To protect biodiversity
To promote industrial growth
To expand urban areas
What is the term for the maximum population size that an environment can sustain?
Biotic potential
Carrying capacity
Population density
Ecological footprint
What is the primary source of energy for the Earth's climate system?
Geothermal energy
Wind energy
Solar energy
Nuclear energy
What is the primary function of chloroplasts in plant cells?
Energy production
Photosynthesis
Respiration
Protein synthesis
What is the most abundant element in the universe?
Oxygen
Hydrogen
Helium
Carbon
What is the smallest unit of an element that retains the properties of that element?
Molecule
Atom
Ion
Compound
What is the difference between a hypothesis and a theory?
A hypothesis is a proven fact, while a theory is not.
A hypothesis is an educated guess, while a theory is a well-substantiated explanation.
A hypothesis is based on a theory, while a theory is based on facts.
A hypothesis can change, while a theory is always fixed.
What is the primary function of the cell membrane?
Energy production
Protection and regulation of what enters and exits the cell
Protein synthesis
DNA replication
What is the formula for calculating the area of a triangle?
A = bh
A = 1/2 bh
A = πr²
A = lw
Which of the following is a characteristic of living organisms?
Ability to grow
Ability to reproduce
Response to stimuli
All of the above
What is the main goal of scientific research?
To prove theories
To discover new knowledge
To validate existing knowledge
To eliminate uncertainty
Which of the following is NOT a renewable resource?
Solar energy
Wind energy
Natural gas
Hydropower
What is the primary purpose of an experiment in scientific research?
To prove a hypothesis
To gather data
To test a hypothesis
To draw conclusions
What is the term for the variety of life in a particular ecosystem?
Population
Community
Biodiversity
Habitat
What is the primary cause of ocean acidification?
Increased carbon dioxide levels
Pollution from plastics
Overfishing
Oil spills
What is the primary purpose of using a control group in an experiment?
To increase the sample size
To provide a standard for comparison
To manipulate variables
To ensure accurate measurements
What is the process by which plants lose water vapor?
Osmosis
Transpiration
Respiration
Evaporation
What is the most common type of rock found in the Earth's crust?
Igneous rock
Sedimentary rock
Metamorphic rock
Volcanic rock
What is the term for the movement of tectonic plates?
Erosion
Weathering
Plate tectonics
Sedimentation
What is the main component of the Earth's atmosphere?
Oxygen
Hydrogen
Nitrogen
Carbon dioxide
What is the primary purpose of a hypothesis in scientific research?
To prove a fact
To provide a basis for experimentation
To summarize findings
To eliminate variables
What is the term for the gradual change in species over time?
Adaptation
Evolution
Mutation
Natural selection
What is the primary greenhouse gas responsible for climate change?
Methane
Nitrous oxide
Water vapor
Carbon dioxide
What is the scientific term for a substance that speeds up a chemical reaction?
Catalyst
Inhibitor
Reactant
Product
What is the primary function of the kidneys in the human body?
Hormone production
Blood filtration
Nutrient absorption
Respiration
What is the term for the study of heredity?
Ecology
Genetics
Biochemistry
Microbiology
What is the term for the maximum number of individuals that an ecosystem can support?
Biotic potential
Carrying capacity
Population density
Ecological niche
What is the primary purpose of a scientific model?
To replace experimental data
To simplify complex systems
To provide absolute answers
To eliminate uncertainty
