1,255 practice questions for CBSE Class 6 Science, organised by NCERT chapter (12 chapters). Every question includes a written explanation. Pick a chapter below, or try the samples first.
A magnet exerts its force across a gap, so a pin jumps towards it before any contact is made. Touching is not needed for the pull to act. Wetting or heating the pin does not decide whether a magnet can attract it.
Q2
hard
Two habitats are described. The first has scattered thorny shrubs, very hot days and almost no rain. The second is covered mainly with grasses, has few trees and supports many grazing animals. Which pair names them correctly?
ABoth of them are forests
BThe first is a grassland and the second is a desert
CThe first is a forest and the second is a mountain
DThe first is a desert and the second is a grassland
Show answer and explanation
Correct answer: D - The first is a desert and the second is a grassland
Thorny shrubs with great heat and almost no rain describe a desert, while a cover of grasses with few trees and grazing animals describes a grassland. Calling the first a grassland and the second a desert swaps the two. Neither place is thick with tall trees, so neither is a forest, and no height or cold is mentioned for a mountain.
Q3
medium
Assertion (A): A temperature of $-5\ ^\circ\text{C}$ is warmer than a temperature of $-1\ ^\circ\text{C}$. Reason (R): The number $5$ is greater than the number $1$.
ABoth A and R are true, and R is the correct explanation of A
BBoth A and R are true, but R is not the correct explanation of A
CA is true, but R is false
DA is false, but R is true
Show answer and explanation
Correct answer: D - A is false, but R is true
R is a true statement about plain numbers. A is false, because below the zero mark a larger number means further down the scale, so $-5\ ^\circ\text{C}$ is the colder of the two.
Q4
hard
Two neighbouring fields get the same low rainfall. One is sown with paddy and the other with jowar. Which outcome is most likely?
ABoth crops fail, because no cereal grows with low rainfall
BThe jowar crop survives better because it needs less water
CBoth crops do equally well, because rainfall does not matter
DThe paddy crop survives better because it needs less water
Show answer and explanation
Correct answer: B - The jowar crop survives better because it needs less water
Jowar is a millet suited to dry conditions, while paddy needs plenty of standing water, so jowar copes far better with low rainfall. The reversed choice swaps the water needs of the two crops. Millets are cereals that do grow with low rainfall, and rainfall clearly decides which crop survives.
Q5
hard
A wide shallow tray and a narrow tall glass hold the same amount of salt solution and stand side by side in the sun. The water dries up first in
Athe glass, because the liquid in it is deeper
Bthe tray, because a larger surface of liquid is open to the air
Cneither, because evaporation happens only on boiling
Dboth at the same time, since the amounts are equal
Show answer and explanation
Correct answer: B - the tray, because a larger surface of liquid is open to the air
Evaporation happens at the open surface, so the wide tray, with far more surface exposed, loses water faster. Greater depth in the narrow glass gives a small surface and slows drying. Equal amounts do not mean equal surfaces, and evaporation goes on well below boiling.
Q6
easy
Why is it useful to estimate a length before measuring it?
AAn estimate is always more accurate than a measurement
BEstimating tells you what material the object is made of, so you can pick the right scale
CEstimating removes the need to measure at all
DA measured value far from the estimate warns you that something has gone wrong
Show answer and explanation
Correct answer: D - A measured value far from the estimate warns you that something has gone wrong
An estimate sets a rough expectation, so a measurement far away from it points to a mistake such as a misread scale. Estimating does not replace measuring, and it is less accurate, not more. It says nothing about what an object is made of.
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