WorksheetsNAT Grade 12 Science
Total questions: 60
Worksheet time: 3600secs
Which statement should be classified under the Aristotelian view of motion?
Objects in motion remain in motion unless acted upon by a force.
Heavier objects fall faster than lighter objects.
All falling objects accelerate at the same rate (ignoring air resistance).
Motion is relative to the observer.
A student creates a Venn diagram comparing Aristotle and Galileo. Which grouping correctly organizes their ideas? Aristotle only: Inertia Galileo only: Continuous force required Aristotle only: Heavier objects fall faster; Motion requires a mover Galileo only: Inertia; Equal falling rate Aristotle only: Parabolic projectile motion Galileo only: Natural and violent motion Both: Continuous force needed to maintain motion
Aristotle only: Inertia; Galileo only: Continuous force required
Aristotle only: Heavier objects fall faster; Motion requires a mover; Galileo only: Inertia; Equal falling rate
Aristotle only: Parabolic projectile motion; Galileo only: Natural and violent motion
Both: Continuous force needed to maintain motion
Arrange the historical development of ideas about motion in the correct order. 1. Newton formulates the laws of motion. 2. Aristotle proposes natural and violent motion. 3. Galileo performs experiments on falling bodies.
2 → 3 → 1
3 → 2 → 1
1 → 2 → 3
2 → 1 → 3
A student kicks a soccer ball across a field. Which law is correctly associated with the situation where the ball eventually slows down and stops?
Newton’s First Law – Objects resist changes in motion, but friction acts on the ball.
Newton’s Second Law – Greater mass increases acceleration.
Newton’s Third Law – Forces come in equal pairs.
Law of Universal Gravitation – Earth attracts the ball.
If the same ball is kicked with twice as much force and its mass remains constant, what is the effect on its acceleration?
Acceleration decreases
Acceleration stays the same
Acceleration doubles
Acceleration becomes zero
Suppose the ball is kicked on the Moon, where gravity is weaker and there is no air resistance. What will most likely happen?
The ball will fall faster than on Earth.
The ball will travel farther before hitting the ground.
The ball will not move.
The ball’s mass will decrease.
Two carts move on a frictionless track. Cart A (2 kg) moves at 4 m/s to the right. Cart B (2 kg) is initially at rest. They collide and stick together. Which information is related to energy conservation rather than momentum conservation?
The masses of the carts
The initial velocities of the carts
The carts stick together after collision
The color of the carts
Which information is irrelevant when calculating the system’s total momentum before collision?
Mass of Cart A
Velocity of Cart A
Velocity of Cart B
The length of the track
What is the final velocity of the two carts after they stick together?
1 m/s
2 m/s
4 m/s
8 m/s
For a student observing water being heated in a pot, the following data are available: volume of water; initial temperature; type of pot material; time elapsed; color of the stove. Which of the following correctly identifies different types of information for a physics experiment on temperature change?
All information is equally relevant
Volume, initial temperature, pot material, and time are quantitative; color of stove is qualitative
Only the volume is relevant
Time and stove color are physical constants
A teacher asks: Calculate the final temperature of 500 g of water after 5 minutes of heating with a 200 W stove. Which information is required to answer this question?
Mass of water, heating power, time, specific heat capacity of water
Color of stove, type of pot, initial room temperature
Volume of water only
Shape of the pot, color of the water
If a question asks: “Describe how heat is transferred from the stove to the water,” which type of information should you provide?
Numerical values for mass and temperature only
Explanation of conduction from stove to pot and convection in water
Color and shape of the pot
Time it takes for water to boil in minutes only
A student wants to determine the angle of reflection when a light ray hits a plane mirror. Which strategy is most appropriate?
Measure the distance between the mirror and the source
Draw the incident ray and normal, then measure the angle between them
Measure the brightness of the reflected light
Change the color of the light
The student wants to verify the law of reflection experimentally. Which method is appropriate?
Use a laser pointer, a plane mirror, and a protractor to measure incident and reflected angles
Use a prism to bend the light and observe colors
Place a mirror in the dark and see if light appears
Shine light on a black cloth and measure absorption
Which of the following is an alternative method to determine the angle of reflection without using a protractor?
Using a ray diagram on paper to calculate angles geometrically
Using a prism to refract light
Measuring the color of reflected light
Observing shadow formation
A student is researching the history of atomic models and comes across articles describing the experiments of J.J. Thomson, Ernest Rutherford, Henry Moseley, and Niels Bohr. Which type of source would provide first-hand experimental details about Rutherford’s gold foil experiment?
A modern textbook summarizing atomic theory
Ernest Rutherford’s original research paper
A Wikipedia article about atomic structure
A YouTube video explaining atomic models
A student is researching the history of atomic models and comes across articles describing the experiments of J.J. Thomson, Ernest Rutherford, Henry Moseley, and Niels Bohr. A student finds an article online claiming J.J. Thomson discovered the neutron. What is the best indicator that this source may lack credibility?
It is written by a well-known physics professor
It has multiple references to peer-reviewed journals
It contains factual errors about historical discoveries
It is published in a reputable physics journal
A student is researching the history of atomic models and comes across articles describing the experiments of J.J. Thomson, Ernest Rutherford, Henry Moseley, and Niels Bohr. When evaluating sources on the Bohr model of the atom, which criterion is most important to ensure the information is reliable?
The font size and website design
Whether the source cites experiments and scientific evidence
Whether the article is written in simple language
The popularity of the website among students
Which of the following is the best way to present information about the differences between elements and molecules in a visual medium?
Write a paragraph on a word document
Create a labeled diagram showing atoms forming molecules
Read a textbook aloud in class
Memorize definitions and recite them
While preparing a slide presentation, how should the student organize the information about elements and molecules for clarity?
Randomly place facts across the slides
Group slides into “Elements” and “Molecules” sections with examples
Only include a single slide with all information
Write long paragraphs on each slide without headings
The student notices the slides are confusing because chemical symbols appear before the explanation of elements. What is the best way to re-sequence the information?
Keep symbols first to grab attention
Explain what an element is, then show the chemical symbols as examples
Remove the examples of symbols entirely
Combine everything into one text-heavy slide
If a compound has a high melting point, conducts electricity when molten, and is formed between a metal and a nonmetal, which hypothesis can the student generate about the type of compound?
The compound is covalent
The compound is ionic
The compound is molecular
The compound is metallic
The student discovers that a compound with similar properties to the first one does not conduct electricity when molten. How should the hypothesis about the type of compound be modified?
It must still be ionic
It is likely covalent instead of ionic
It is a metallic compound
The compound cannot exist
Based on the observations about electrical conductivity and melting point, which general hypothesis can the student propose for identifying other unknown compounds?
All compounds with low melting points are ionic
Compounds formed between metals and nonmetals are likely ionic; compounds between nonmetals are likely covalent
All compounds conduct electricity
Covalent compounds always have high melting points
Which observation is associated with the complete combustion of methane (CH4)?
Production of black soot and water
Formation of carbon dioxide and water
Formation of carbon monoxide only
Methane does not react with oxygen
What is the cause of carbon monoxide production during the combustion of hydrocarbons?
Excess oxygen in the reaction
Limited oxygen supply during combustion
Presence of nitrogen in the fuel
Heating the fuel too slowly
If a student burns propane (C3H8) in excess oxygen, what is the expected outcome?
Formation of carbon monoxide and water
Formation of carbon dioxide and water
Production of soot with water only
No reaction; unburned propane remains
Which of the following is evidence that soap can remove grease?
Soap has a pleasant fragrance
Soap molecules have hydrophobic tails that bind to oils and hydrophilic heads that bind to water
Soap comes in many colors
Soap is sold in bars or liquid forms
How does the evidence about soap molecules support the argument that soap is effective in cleaning?
Because hydrophobic tails attract water
Because hydrophobic tails bind to oils while hydrophilic heads bind to water, forming micelles that trap grease
Because soap smells good
Because soap is colorful and appealing
Based on the structure of soap and experimental observations, what conclusion can the student draw about soap and detergents?
Soap cannot remove dirt effectively
Soap and detergents are effective because they form micelles that trap oils and dirt, which can then be washed away with water
Soap is only useful for its fragrance
Soap works because it changes color when it touches dirt
Which of the following correctly classifies Earth’s major spheres?
Crust, Mantle, Core
Lithosphere, Asthenosphere, Mesosphere, Core
Atmosphere, Hydrosphere, Biosphere, Geosphere
Troposphere, Stratosphere, Mesosphere, Thermosphere
Which of the following shows a logical organization of Earth’s spheres from largest system to subsystems?
Earth → Spheres → Subsystems → Components
Geosphere → Lithosphere → Crust → Mantle
Atmosphere → Hydrosphere → Biosphere → Geosphere
Biosphere → Hydrosphere → Atmosphere → Geosphere
Sequence the interaction of Earth’s spheres during a volcanic eruption: Geosphere, Atmosphere, Biosphere, Hydrosphere
Geosphere → Atmosphere → Biosphere → Hydrosphere
Atmosphere → Geosphere → Hydrosphere → Biosphere
Biosphere → Hydrosphere → Atmosphere → Geosphere
Hydrosphere → Geosphere → Atmosphere → Biosphere
Which of the following rocks does not belong based on how it is formed?
Granite
Basalt
Sandstone
Gabbro
When classifying a rock, which factor is most relevant?
The mineral composition of the rock
The price of the rock in the market
The region where the rock is mined
The folklore or myths about the rock
Which combination of characteristics is most useful for identifying an igneous rock?
Mineral composition, texture, cooling history
Fossil content, texture, mineral composition
Fossil content, color, market value
Color, location found, folklore
Which of the following geological features is most closely associated with tectonic plate movement?
Earthquakes
River erosion
Sand dune formation
Coastal deposition
Which of the following shows a correct cause-and-effect relationship for an endogenic process?
Magma rises → Formation of volcanoes
Heavy rainfall → Formation of river valleys
Wind blows → Sand dune migration
Glacier melts → Coastal flooding
If tectonic activity increases in a region, what is the most likely geological outcome over time?
Increased earthquake frequency and mountain building
Formation of sand dunes along deserts
Widening of river valleys by erosion
Deposition of sediments along riverbanks
Which of the following is the primary source for studying crustal deformation?
A research article describing measurements of fault movements
A textbook summarizing types of folds
A news report about a recent earthquake
A teacher’s lecture on plate tectonics
Which factor best determines the credibility of a source on crustal deformation?
Published by a peer-reviewed scientific journal
Written in simple language
Includes colorful diagrams
Appears first in a Google search
Which of the following criteria is most appropriate for evaluating a source on crustal deformation?
Author’s expertise, publication type, date of research
Colorful visuals, number of pages, writing style
Popularity, ease of understanding, citation count
Price, publisher location, country of origin
Which of the following strategies is primarily used to reduce the impact of flooding?
Constructing levees and floodwalls along rivers
Increasing urban paving to improve drainage
Removing wetlands to create more land
Drilling deep wells to lower the water table
Which combination of methods is most appropriate to manage a flood-prone area?
Early warning systems, evacuation plans, and improved drainage systems
Painting houses with waterproof paint and planting flowers
Installing solar panels and energy-efficient appliances
Creating hiking trails and playgrounds
Which of the following can be considered an alternative mitigation method for floods if levees fail?
Installing traffic lights
Relocating communities to higher ground
Expanding shopping malls
Building swimming pools
Which situation is most closely associated with the unifying theme of energy flow in a system?
Rocks breaking into smaller pieces
Plants converting sunlight into chemical energy
Clouds changing shape
Magnets attracting metal
Which example correctly shows cause and effect related to energy transfer?
Decrease in sunlight → Decrease in plant growth
Increase in predators → Increase in prey population
More rainfall → Less water in rivers
More producers → Less energy available to consumers
If the number of producers in an ecosystem decreases significantly, what is the most likely outcome?
Decrease in available energy for higher trophic levels
Immediate increase in predator population
Unlimited energy flow in the system
No effect on consumers
Which of the following are classified as energy carriers produced during photosynthesis?
ATP and NADPH
Oxygen and carbon dioxide
Glucose and starch
Water and chlorophyll
Which arrangement correctly organizes the transformation of energy in photosynthesis?
Light energy → Chemical energy (ATP/NADPH) → Stored energy in glucose
Chemical energy → Light energy → Heat energy
Glucose → ATP → Sunlight
Oxygen → Carbon dioxide → Light energy
Which sequence best represents the steps involved in producing glucose during photosynthesis?
Light is absorbed by chlorophyll → ATP and NADPH are produced in the light reactions → Carbon dioxide is fixed in the Calvin cycle → Glucose is synthesized
Glucose is broken down in mitochondria → Light is absorbed by pigments → Oxygen is released → Starch is formed
Water is converted directly into glucose → Sunlight is reflected by leaves → ATP is used to emit heat → Carbon dioxide is released
Chlorophyll releases energy as heat → Calvin cycle captures sunlight → ATP and NADPH are converted into light → Oxygen is fixed into carbon
A student notices that herbivores have longer intestines than carnivores. Which hypothesis can explain this observation?
Longer intestines allow more time for the breakdown of plant material
Herbivores do not eat much food
Carnivores digest food slower
Intestine length does not affect digestion
After studying omnivores, which modification makes the hypothesis more accurate?
Intestine length varies depending on diet complexity, with herbivorous diets requiring longer intestines
Only herbivores have intestines
Omnivores digest food without intestines
Intestine length is random
What general principle can be drawn from comparing digestive systems in different animals?
Digestive system structure evolves to maximize nutrient absorption based on diet
All animals have identical digestive tracts
Digestive systems are unrelated to diet
Only herbivores have specialized digestive systems
Which of the following is an example of evidence supporting evolution?
Fossil records showing gradual changes in species over time
The design of modern smartphones
The color of a rainbow
Popular myths about mythical creatures
How does fossil evidence support the argument that species evolve over time?
Fossils show transitional forms between ancient and modern species
Fossils are found only in deserts
Fossils are colorful and attractive to collectors
Fossils prove that the Earth is flat
Based on fossil evidence, anatomical similarities, and genetic studies, which conclusion is most supported?
All species appeared suddenly and remain unchanged
Fossils are unrelated to living organisms
Species have evolved from common ancestors over long periods
Evolution occurs only in laboratories
Which of the following is the best way to present information about a food web in another medium?
Drawing a diagram showing producers, consumers, and decomposers
Writing the definition of “food web” repeatedly
Listing animals alphabetically without connections
Recording the temperature of a nearby pond
When organizing a food web diagram, which method is most effective?
Place producers at the bottom, primary consumers above them, and secondary consumers at the top
Place all animals randomly without hierarchy
Organize species alphabetically
Arrange organisms by size only
How would you reorganize a food web diagram to show the flow of energy more clearly?
Use arrows from producers to decomposer
Remove arrows and group species by color
Arrange species in a circle with no connections
List all organisms in alphabetical order
