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Quizzes > High School Quizzes > Science

2015 PSLE Science Practice Test

Refine skills with sample questions and tips

Difficulty: Moderate
Grade: Grade 6
Study OutcomesCheat Sheet
Colorful paper art promoting 2015 PSLE Science Challenge trivia quiz for primary students.

What is the state of matter that has a fixed shape and fixed volume?
Solid
Liquid
Gas
Plasma
Solid is the state of matter in which particles are closely packed in a fixed arrangement, giving it a definite shape and volume. This distinguishes it from liquids and gases.
Which process involves the change of water from liquid to gas?
Condensation
Evaporation
Freezing
Melting
Evaporation is the process in which water changes from a liquid state to a gaseous state when heated. The other processes describe different phase changes.
What is the energy form that comes directly from the Sun?
Thermal energy
Chemical energy
Solar energy
Electrical energy
Solar energy is derived directly from the Sun and is harnessed through various technologies. This makes it the most obvious energy source from the solar system.
Which part of a plant is primarily responsible for photosynthesis?
Roots
Stem
Flowers
Leaves
Photosynthesis mainly occurs in the leaves where chlorophyll captures sunlight. This process enables plants to manufacture their own food.
What is the basic unit of life?
Atom
Cell
Molecule
Organ
The cell is considered the basic building block of all living organisms. It is the smallest unit that can carry out all life processes.
During the water cycle, which process describes water vapor cooling and forming clouds?
Evaporation
Condensation
Sublimation
Precipitation
Condensation occurs when water vapor cools and turns into tiny liquid droplets, forming clouds. This is a fundamental process in the water cycle.
Which tool is used to measure temperature?
Thermometer
Barometer
Hygrometer
Anemometer
A thermometer is specifically designed to measure temperature in various settings. The other instruments are used for measuring pressure, humidity, or wind speed.
What is a function of the human skeletal system?
Pump blood
Digest food
Support and protect the body
Produce hormones
The skeletal system provides structure and protection for the body, supporting movement and safeguarding vital organs. Its main function is to serve as the framework of the body.
Which type of energy is stored in food?
Kinetic energy
Chemical energy
Electrical energy
Radiant energy
Food contains chemical energy that is released during metabolism to fuel the body's functions. This stored energy is crucial for growth and activity.
How does a pulley system help lift heavy objects?
It decreases the force required
It increases the weight of the object
It changes the direction of force only
It has no effect
A pulley system reduces the amount of force needed by distributing the weight and changing the direction of the applied force. This mechanical advantage makes lifting heavy loads easier.
Which phenomenon explains why we see a rainbow?
Reflection
Refraction and dispersion of light
Diffraction
Absorption
Rainbows form when light enters water droplets, where it is refracted and dispersed into a spectrum of colors. This interaction of light with water droplets is responsible for the rainbow's appearance.
What is a characteristic of a good scientific experiment?
No control variables
Unrepeatable results
Fair testing procedure
Biased observations
A good scientific experiment uses a fair testing procedure, which includes controlling variables and ensuring results can be replicated. This minimizes errors and confirms the validity of conclusions.
Which gas is most abundant in Earth's atmosphere?
Oxygen
Carbon Dioxide
Nitrogen
Hydrogen
Nitrogen makes up about 78% of Earth's atmosphere, making it the most abundant gas. The other gases are present in much smaller proportions.
In an electrical circuit, what is the role of a resistor?
To increase current
To store electrical charge
To reduce current flow
To generate power
A resistor limits the flow of electrical current, ensuring that sensitive components are not damaged. It plays a critical role in controlling the circuit's overall function.
Which of the following best describes an ecosystem?
A community of organisms and their environment
A group of plants only
A water body only
Only the living organisms
An ecosystem is a community of living organisms interacting with both biotic and abiotic factors in their environment. This integrated system is essential for maintaining ecological balance.
How does increasing temperature generally affect the rate of chemical reactions?
It decreases the rate
It has no effect
It increases the rate
It stops the reaction
Increasing temperature raises the kinetic energy of molecules, leading to more frequent and energetic collisions. This results in an increased rate of chemical reactions.
In an experiment on plant growth, if one group of plants receives additional sunlight while another group is kept in the shade, what is the primary variable being tested?
Independent variable
Dependent variable
Controlled variable
Confounding variable
The independent variable is the factor that is deliberately altered in an experiment. In this case, the amount of sunlight provided to the plants is the independent variable.
Which of the following best explains why sound travels faster in water than in air?
Water molecules are more spread out than air molecules
Water is denser than air, allowing vibrations to transmit quickly
Air absorbs sound waves more efficiently
Water has less resistance to sound waves
Sound travels faster in water because the molecules are more closely packed together compared to air. This higher density facilitates the rapid transmission of sound vibrations.
When testing the effects of light on plant growth, what is the purpose of having a control group?
To ensure that all factors are altered
To isolate the effect of light by providing a baseline for comparison
To amplify the effects of light
To confuse the experimental results
A control group serves as a baseline that remains unchanged during the experiment, allowing scientists to compare results effectively. This isolation helps determine the specific impact of the light exposure.
Why is it important to replicate scientific experiments?
To introduce experimental error
To confirm reliability and validity of results
To confuse the scientific process
To invalidate previous outcomes
Replication helps confirm that experimental results are reliable and valid by showing consistency across multiple trials. This process is essential for strengthening scientific conclusions.
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Study Outcomes

  1. Understand key science concepts relevant to primary school learning.
  2. Analyze questions to identify core scientific principles.
  3. Apply logical reasoning to solve practice quiz challenges.
  4. Evaluate experimental data and draw evidence-based conclusions.
  5. Utilize effective study techniques to enhance exam preparedness.

2015 PSLE Science Paper Review Cheat Sheet

  1. Master the characteristics of living things - Living organisms all share traits like cellular organization, growth, reproduction, response to stimuli, and metabolism. Grasping these features helps you classify organisms and see how they interact in ecosystems. Dive into more details here: yestuition.sg
  2. Explore the three states of matter - Solids, liquids, and gases behave differently under changes in temperature and pressure. Understanding these transitions will let you predict and explain everyday phenomena like ice melting or steam rising. Get the full rundown at yestuition.sg
  3. Discover energy transformations - Kinetic, potential, thermal, electrical, and chemical energy constantly convert from one form to another. Recognizing these shifts is crucial for solving real-world problems, from powering gadgets to understanding your body's metabolism. Learn more on yestuition.sg
  4. Trace plant and animal life cycles - From pollination and seed germination to metamorphosis and reproduction, each stage tells a story of growth and survival. Drawing colorful diagrams helps cement each phase in your mind and reveals fascinating patterns in nature. Check out this guide: globaleducationsg.wixsite.com
  5. Unpack human body systems - Explore how the digestive, circulatory, and respiratory systems team up to keep you alive and thriving. Understanding these networks gives you a backstage pass to your own physiology and how it responds to food, exercise, and illness. Find insights at explico.sg
  6. Master multiple-choice tactics - Use the elimination technique to rule out wrong answers and boost your chances of picking the right one. Practicing this skill will sharpen your focus, build confidence, and shave precious minutes off your exam time. For more strategy tips, visit firstprinciples.com.sg
  7. Boost memory with active recall - Create flashcards or jot down key concepts in your own words to reinforce learning. This powerful method solidifies facts in your brain and makes retrieval during exams a breeze. Start crafting your flashcards here: mindchamps.org
  8. Visualize with concept maps - Draw webs of related scientific ideas to spot connections and knowledge gaps. This visual approach turns complex topics into clear, memorable maps that guide your revision. Explore mapping techniques at edufront.com
  9. Get hands‑on with simple experiments - Bring science to life by observing the water cycle with mini terrariums or tracking plant growth in your backyard. These activities make learning fun and help you remember concepts through real-world experience. Try a home experiment: nanyanglearning.com
  10. Practice with past PSLE papers - Familiarize yourself with the exam's format, question styles, and time constraints by working through real past papers. Reviewing your answers critically will reveal strengths to celebrate and weaknesses to target. Dive into past papers at edufront.com
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