A scientific investigation where only one factor is changed at a time, keeping all others constant, is called a... π
A Random guess π
B Fair test π
C Wild theory π
D Lucky trial π
Which of these best describes biodiversity? π
A The number of rivers in a region π
B The number of trees in one forest only π
C The variety of living things found in an area π
D The weight of all animals combined π
Which nutrient is mainly needed for building and repairing our muscles? π
A Vitamin C π
B Water π
C Carbohydrate π
D Protein π
A deficiency disease caused by a lack of Vitamin C is... π
A Scurvy π
B Night blindness π
C Rickets π
D Goitre π
Which pole of a freely suspended bar magnet always points towards the geographic North? π
A South pole π
B North-seeking pole π
C Both poles equally π
D Neither pole π
Which of these is the correct SI unit of length? π
A Second π
B Kilogram π
C Metre π
D Litre π
The motion of a swing moving back and forth is an example of... π
A Random motion π
B Rectilinear motion π
C Circular motion π
D Oscillatory motion π
A material that lets light pass through it clearly, so objects can be seen distinctly, is called... π
A Transparent π
B Magnetic π
C Opaque π
D Translucent π
Which thermometer is normally used to measure human body temperature? π
A Laboratory thermometer π
B Clinical thermometer π
C Weather thermometer π
D Oven thermometer π
The process by which water changes from liquid to vapour on heating is called... π
A Melting π
B Condensation π
C Evaporation π
D Freezing π
Which method is best to separate a mixture of iron filings and sand? π
A Sieving π
B Decantation π
C Filtration π
D Using a magnet π
Which of these is an irreversible change? π
A Burning of paper π
B Dissolving sugar in water π
C Folding a paper π
D Melting of ice π
Which of these is NOT one of the characteristics of living things? π
A Respiration π
B Melting π
C Reproduction π
D Growth π
Coal and petroleum are examples of... π
A Living organisms π
B Renewable resources π
C Fossil fuels π
D Solar energy sources π
Which of the "5 Rs" means using an item again instead of throwing it away? π
A Recycle π
B Refuse π
C Reduce π
D Reuse π
A group of stars that forms a recognisable pattern in the sky is called a... π
A Constellation π
B Comet π
C Asteroid π
D Galaxy π
Which planet is known as the Red Planet? π
A Venus π
B Mars π
C Jupiter π
D Saturn π
The Moon is best described as a natural... π
A Comet π
B Star π
C Satellite of Earth π
D Planet π
Light travels in a... π
A Circular path π
B Zigzag path π
C Curved path π
D Straight line π
A shadow is formed when light is blocked by an opaque object because light cannot... π
A Pass through the object π
B Reflect off any surface π
C Travel at all π
D Bend around corners π
In a simple electric circuit, which part is used to break or complete the flow of current? π
A Cell π
B Switch π
C Wire π
D Bulb π
Which of these materials is a good conductor of electricity? π
A Wood π
B Rubber π
C Copper π
D Plastic π
Spinning is the process of making yarn from... π
A Dyes π
B Buttons π
C Woven cloth π
D Fibres π
A joint that allows movement only in one direction, like a door hinge, is found in our... π
A Elbow π
B Hip π
C Neck π
D Shoulder π
Which gas in the air is most needed by living things for respiration? π
A Nitrogen π
B Oxygen π
C Carbon dioxide π
D Argon π
Somchai has a mixture of salt dissolved in water and wants to get back the solid salt. Which method should he use? π
A Filtration π
B Sieving π
C Evaporation π
D Handpicking π
Meena tests a thermometer in boiling water and finds it reads 105 degrees Celsius instead of the expected 100 degrees. What is the most likely explanation? π
A Boiling point changes randomly every day π
B Water always boils above 100 degrees π
C The water was not really boiling π
D The thermometer is faulty or not calibrated correctly π
If Earth's magnetic poles were suddenly to swap places, what would happen to a compass needle that used to point North? π
A It would now point towards South instead π
B It would stop working completely π
C It would point straight up π
D It would spin forever without stopping π
Priya observes that a plant kept near a window always bends and grows towards the light. What does this behaviour show about living things? π
A Plants can move from place to place like animals π
B Living things show sensitivity by responding to stimuli like light π
C The plant is sick and growing incorrectly π
D Light has no real effect on plant growth π
Arjun has a mixture of small stones, sand, and floating leaves in a bucket of water. What is the best FIRST step to separate the leaves? π
A Use a magnet to pull out the leaves π
B Filter the entire mixture through cloth π
C Handpick the floating leaves off the surface π
D Evaporate all the water first π