10th Science Differentiation Questions | Distinguish Between Class 10

Perfect your exam presentation with our master collection of 10th Science Differentiation Questions. "Distinguish between" questions are among the highest-yielding areas in the Class 10 Science exam, offering an easy way to score full marks if presented in a clear, tabular format. This comprehensive guide compiles all critical comparison topics across Physics, Chemistry, and Biology. Whether you are revising the differences between concave and convex lenses, roasting and calcination, or aerobic and anaerobic respiration, this page provides precise, point-by-point comparisons designed to match the exact keys evaluators look for.

GRADE X

SCIENCE • DIFFERENTIATION QUESTIONS

1. Mass vs Weight

Mass	Weight
Mass is defined as the quantity of matter contained in the body.	Weight is defined as the gravitational force exerted on a body due to the gravity.
SI unit of mass is kilogram (kg).	SI unit of weight is newton (N).
It is a scalar quantity.	It is a vector quantity.
Mass remains constant.	Weight varies based on the gravitational field.

2. Convex Lens vs Concave Lens

Feature	Convex Lens	Concave Lens
Shape	Thicker at the center and thinner at the edges.	Thinner at the center and thicker at the edges.
Type of Lens	Converging lens (brings light rays together).	Diverging lens (spreads light rays apart).
Image formation	Mostly form real images.	Always forms virtual images.
Focal Length	Positive focal length.	Negative focal length.
Uses	Used to treat hypermetropia.	Used to treat myopia.
Example	Magnifying glass.	Spectacle lens for nearsightedness.

3. Myopia vs Hypermetropia

Feature	Myopia (Shortsightedness)	Hypermetropia (Longsightedness)
Definition	Inability to see distant objects clearly. Nearby objects can be seen clearly.	Inability to see nearby objects clearly. Distant objects can be seen clearly.
Cause	Lengthening of eyeball.	Shortening of eyeball.
Image Formation	Image forms in front of the retina.	Image forms behind the retina.
Focal Length	Focal length of eye lens is reduced.	Focal length of eye lens is increased.
Correction	Corrected with a concave lens.	Corrected with a convex lens.
Example	Difficulty seeing the blackboard from a distance.	Difficulty reading a book up close.

4. Sound vs Light

SOUND	LIGHT
Medium is required for the propagation.	Medium is not required for the propagation.
Sound waves are longitudinal.	Light waves are transverse.
Wavelength ranges from 1.65 cm to 1.65 m.	Wavelength ranges from 4 × 10^-7 m to 7 × 10^-7 m.
Sound waves travel in air with a speed of about 340 ms^-1 at NTP.	Light waves travel in air with a speed of 3 × 10⁸ ms^-1.

5. Nuclear Fission vs Nuclear Fusion

Nuclear Fission	Nuclear Fusion
The process of breaking up of a heavy nucleus into two smaller nuclei is called 'nuclear fission'.	Nuclear fusion is the combination of two lighter nuclei to form a heavier nucleus.
Can be performed at room temperature.	Extremely high temperature and pressure is needed.
Alpha, beta and gamma radiations are emitted.	Alpha rays, positrons, and neutrinos are emitted.
Fission leads to emission of gamma radiation.	Only light and heat energy is emitted.

6. Reversible Reaction vs Irreversible Reaction

REVERSIBLE REACTION	IRREVERSIBLE REACTION
It can be reversed under suitable conditions.	It cannot be reversed.
Both forward and backward reactions take place simultaneously.	It is unidirectional. It proceeds only in forward direction.
It attains equilibrium.	Equilibrium is not attained.
The reactants cannot be converted completely into products.	The reactants can be completely converted into products.
It is relatively slow.	It is fast.

7. Linear vs Superficial vs Cubical Expansion

Linear Expansion	Superficial Expansion	Cubical Expansion
When a body is heated or cooled, the length of the body changes due to change in its temperature. Then the expansion is said to be linear expansion.	If there is an increase in the area of a solid object due to heating, then the expansion is called Superficial expansion.	If there is an increase in the volume of a solid body due to heating, then the expansion is called cubical expansion.
The ratio of increase in length of the body per degree rise in temperature to its unit length is called as the coefficient of linear expansion.	The ratio of increase in area of the body per degree rise in temperature to its unit area is called as coefficient of superficial expansion.	The ratio of increase in volume of the body per degree rise in temperature to its unit volume is called as coefficient of cubical expansion.
It is also called as longitudinal expansion.	It is also called as Areal expansion.	It is also called as Volumetric expansion.

8. Resistivity vs Conductivity

Feature	Resistivity (ρ)	Conductivity (σ)
Definition	The property of a material to oppose the flow of electric current.	The property of a material to allow the flow of electric current.
Formula	ρ = (R × A) / L	σ = 1 / ρ
Unit	Ohm meter (Ω m)	ohm-metre^-1 (Ω^-1 m^-1) or mho meter
Nature	Higher for insulators like glass or rubber.	Higher for conductors like copper or aluminum.
Significance	Measures how much a material resists electric current.	Measures how well a material conducts electric current.
Example	Nichrome has a high resistivity and is used in heating elements.	Copper has a high conductivity and is used in electrical wiring.

9. Natural vs Artificial Radioactivity

Natural radioactivity	Artificial radioactivity
Emission of radiation due to self-disintegration of a nucleus.	Emission of radiation due to disintegration of a nucleus through induced process.
Alpha, beta and gamma radiations are emitted.	Mostly elementary particles such as neutron, positron, etc. are emitted.
It is a spontaneous process.	It is an induced process.
Exhibited by elements with atomic number more than 82.	Exhibited by elements with atomic number less than 82.
This cannot be controlled.	This can be controlled.

10. Soap vs Detergent

Feature	Soap	Detergent
Composition	Sodium salts of long chain fatty acids	Sodium salts of sulphonic acids
Cleansing in hard water	Ineffective due to insoluble scum formation	Effective even in hard water
Biodegradability	Biodegradable	Often non-biodegradable (branched chains)
Source	Derived from natural fats or vegetable oils	Prepared from hydrocarbons obtained from crude oil
Scum	It forms scum in hard water	It does not form scum in hard water
Foaming Capacity	It has poor foaming capacity	It has rich foaming capacity

11. Atom vs Molecule

Atom	Molecule
An atom is the smallest particle of an element.	A molecule is the smallest particle of an element or compound.
Atom does not exist in free state except in noble gases.	Molecule exists in a free state.
Except some noble gases, other atoms are highly reactive.	Molecules are less reactive.
Atom does not have a chemical bond.	Atoms in a molecule are held by chemical bonds.

12. Monocot Root vs Dicot Root

Feature	Monocot Root	Dicot Root
Number of Xylem Bundles	Polyarch	Tetrarch
Cambium	Absent	Present
Secondary growth	Absent	Present
Pith	Present	Absent
Conjunctive Tissue	Sclerenchyma	Parenchyma
Example	Maize, Grass	Bean, Sunflower

13. Aerobic Respiration vs Anaerobic Respiration

Aerobic Respiration	Anaerobic Respiration
Complete oxidation of glucose using oxygen.	Breakdown of glucose without using oxygen.
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP	C₆H₁₂O₆ → 2CO₂ + 2C₂H₅OH + ATP
End products are Carbon dioxide (CO₂), water (H₂O), and ATP	End products are Ethanol and carbon dioxide (in yeast) or lactic acid (in bacteria)
High energy is produced.	Low energy is produced.
Complex process (Three stages – 1. Glycolysis, 2. Krebs Cycle, 3. Electron Transport Chain)	Simple process (Glycolysis)

14. Systole vs Diastole

Systole	Diastole
It is the contraction phase of the heart.	It is the relaxation phase of the heart.
The ventricles contract to pump blood out of the heart.	The ventricles relax and fill with blood from the atria.
Blood pressure is higher during systole, known as systolic pressure.	Blood pressure is lower during diastole, known as diastolic pressure.
It occurs after the atrial systole.	It occurs after the ventricular systole.
Results in the pumping of blood to the lungs and body.	Results in the filling of the heart with blood.

15. Voluntary Actions vs Involuntary Actions

Voluntary Actions	Involuntary Actions
Initiated by our own will.	It is not under our control.
Controlled by Cerebral cortex, cerebellum.	Controlled by Hypothalamus / Medulla oblongata.
Example: Walking, writing.	Example: Heartbeat, digestion.

16. Medullated Nerve Fibers vs Non-medullated Nerve Fibers

Medullated Nerve Fibers	Non-medullated Nerve Fibers
Axon is covered with a myelin sheath.	Axon is not covered with a myelin sheath.
It forms the white matter of the brain.	It forms the grey matter of the brain.
Impulse transmission is faster.	Impulse transmission is slower.
Appear white.	Appear grey.

17. Homologous Organ vs Analogous Organ

Homologous Organ	Analogous Organ
They have inherited from common ancestors with similar developmental pattern in embryos.	They have different origin with different development pattern.
Homologous organs look dissimilar and adapted for different functions.	The analogous organs look similar and perform similar functions.
Example 1: Forelimb of a frog and man seem to be built from the same basic design of bones but they perform different functions.	Example 1: Wings of birds and bats look similar. But in birds wings are covered by feathers all along the arm but the wings of bats is skin folds stretched between elongated fingers.
Example 2: A human hand, a front leg of a cat, flipper of a whale and a bat's wing look dissimilar and adapted for different functions.	Example 2: Penguins and fish both have fin-like structures to swim aquatic environments. These locomotory organs have different origin but look similar and perform similar function.

18. Somatic Gene Therapy vs Germ Line Gene Therapy

Somatic Gene Therapy	Germ Line Gene Therapy
It is the replacement of defective gene in somatic cell.	It is the replacement of defective gene in germ cell (sperm and egg).
Correction of genetic defects is beneficial to patient. It may not be carried to next generation.	It will be inherited and beneficial to next generation.

19. Undifferentiated cells vs Differentiated cells

Undifferentiated cells	Differentiated cells
They are unspecialized mass of cells. So these cells could still become any kind of cell that the body needs.	They become specialized cells for doing certain jobs.
Example: Cells in early embryos are undifferentiated. The cells are multiplying, but they haven't started become specific types of cells.	Example: These cells become a liver cell, a blood cell, or a neuron, muscle cells, skin cells, etc.

20. Outbreeding vs Inbreeding

Outbreeding	Inbreeding
It is the breeding of unrelated animals.	It refers to the mating of closely related animals with the same breed.
The hybrids are stronger and vigorous than their parents.	It helps in the accumulation of superior genes and elimination of genes which are undesirable.
Cross between two different species with desirable features of economic value is mated. Male donkey + Female Horse = Mule	Superior males and superior females of the same breed are identified and mated in pairs. Bikaneri (Magra) ewes + Australian Merino rams sheep = Hisardale Sheep