Practice Worksheets for Class 8 Science: Chapter 08 Nature Of Matter Elements, Compounds, And Mixtures
Review targeted practice sets for Class 8 Science Chapter 08 Nature Of Matter Elements, Compounds, And Mixtures. Built according to official educational guidelines for the 2026-27 academic year, these downloadable worksheets support daily revision and core concept reinforcement.
Practice Chapter 08 Nature Of Matter Elements, Compounds, And Mixtures Worksheets for Class 8 Science
Navigate directly to the printable exercises for Chapter 08 Nature Of Matter Elements, Compounds, And Mixtures using the digital viewer below. Each practice set allows students to isolate specific topics for thorough review and uninterrupted practice alongside standard textbooks.
A. Check Point
1. List the differences between compounds and mixtures.
Show answer
Answer:
| Compound | Mixture |
|---|---|
| Elements join chemically in a fixed ratio | Substances are only mixed in any ratio |
| Properties differ from the constituents | Constituents keep their properties |
| Cannot be separated by physical methods | Can be separated by physical methods |
| Always homogeneous | May be homogeneous or heterogeneous |
Teacher's Note:
2. Categorise as mixtures and compounds: air, water, iron(II) sulphide, ice-cream, common salt solution, brass, milk and blood.
Show answer
Answer: Compounds: water, iron(II) sulphide. Mixtures: air, ice-cream, common salt solution, brass, milk and blood.
Teacher's Note:
3. Give an example of a mixture of solid in gas.
Show answer
Answer: Smoke (carbon particles in air) or dust in air.
Teacher's Note:
4. Give two examples each: (a) liquid in liquid (b) solid in liquid (c) gas in liquid.
Show answer
Answer: (a) Alcohol in water; milk (fat in water) or oil and vinegar. (b) Salt in water; sugar in water. (c) Soda water (carbon dioxide in water); oxygen dissolved in water.
Teacher's Note:
5. Fill in the blanks: Mixture contains two or more elements, or compounds or ____. Constituents of mixtures ____ their properties.
Show answer
Answer: both (elements and compounds); retain.
Teacher's Note:
B. Separation of Mixtures
1. What is separation of mixtures? Why are the constituents separated?
Show answer
Answer: Separation means removing the different components of a mixture from each other. Constituents are separated to get pure substances, to remove harmful or unwanted substances and to obtain a useful substance, for example salt from sea water.
Teacher's Note:
2. State any five methods of separating a solid-solid mixture.
Show answer
Answer: Handpicking, sieving, winnowing, magnetic separation, sublimation, sedimentation and decantation, or using a solvent.
Teacher's Note:
3. Name the technique for separating: (a) pure water from impure water (b) cream from milk (c) chalk from a chalk and water mixture (d) kerosene from kerosene and water.
Show answer
Answer: (a) Distillation; (b) centrifugation (or churning); (c) filtration (or sedimentation and decantation); (d) separating funnel.
Teacher's Note: See the diagrams below.
4. Explain with an example: (a) winnowing (b) decantation (c) centrifugation (d) evaporation.
Show answer
Answer: (a) Winnowing: wind blows away the lighter husk from heavier grain. (b) Decantation: pouring off the liquid after a solid settles, for example muddy water. (c) Centrifugation: spinning a mixture rapidly so that heavier particles settle at the bottom, as in separating cream from milk. (d) Evaporation: heating to turn the liquid to vapour and leave the dissolved solid, as with salt from sea water.
Teacher's Note:
5. Name the technique for separation of: (a) a soluble solid in a liquid (b) a mixture of a soluble solid in a liquid (c) large and small-sized particles (d) two immiscible liquids of different densities.
Show answer
Answer: (a) and (b) Evaporation (or crystallization) for a soluble solid in a liquid; (c) sieving; (d) separating funnel.
Teacher's Note: The question prints (a) and (b) the same.
C. Keywords
11. Define: compound, crystal, crystallization, decantation, element, filtration, mixture, sedimentation, sieving, sublimation, winnowing.
Show answer
Answer: Compound: a pure substance made of two or more elements chemically combined in a fixed ratio. Crystal: a solid with a regular geometric shape. Crystallization: formation of crystals from a hot saturated solution on cooling. Decantation: pouring off the clear liquid from a settled solid. Element: a pure substance made of only one kind of atom. Filtration: separating an insoluble solid from a liquid using filter paper. Mixture: two or more substances mixed without chemical combination. Sedimentation: settling of heavy particles at the bottom. Sieving: separating particles of different sizes using a sieve. Sublimation: a solid changing directly into a gas. Winnowing: separating husk from grain with wind.
Teacher's Note:
D. Exercise
(i) An element is made up of (a) one kind of atoms (b) different kinds of atoms (c) different kinds of molecules (d) none
Show answer
Answer: (a) One kind of atoms.
Teacher's Note:
(ii) Which is a compound? (a) N2 (b) NaCl (c) S (d) sand
Show answer
Answer: (b) NaCl.
Teacher's Note:
(iii) Which is a mixture? (a) NaCl+CaCO3 (b) Na2CO3 (c) H2 (d) none
Show answer
Answer: (a) NaCl + CaCO3.
Teacher's Note:
(iv) A homogeneous mixture of two solids is (a) air (b) brass (c) graphite (d) nitrogen
Show answer
Answer: (b) Brass (a mixture of copper and zinc).
Teacher's Note:
(v) To separate chalk from chalk and water use (a) filtration (b) sedimentation (c) evaporation (d) sieving
Show answer
Answer: (a) Filtration.
Teacher's Note:
17. Fill in the blanks: 1. The method of separating the colours (oil) in ink is called ____. 2. Handpicking is used for a mixture with particles of different ____, ____ and ____. 3. A mixture of solid particles, one heavier than the other, can be separated by ____ and ____. 4. Separation of iron articles in a junk yard uses ____.
Show answer
Answer: 1. chromatography; 2. size, shape and colour; 3. sedimentation, decantation; 4. magnetic separation.
Teacher's Note:
18. Give reasons: 1. A mixture of oil and water retains the properties of its constituents. 2. Magnetic separation cannot be used for copper and sulphur. 3. Sand is separated from gravel at construction sites by sieving.
Show answer
Answer: 1. In a mixture, there is no chemical combination, so each substance keeps its own properties. 2. Neither copper nor sulphur is magnetic. 3. Sand particles are smaller than gravel and pass through the holes of the sieve.
Teacher's Note:
19. Match: 1. alcohol from alcohol and water; 2. charcoal from charcoal and water; 3. copper sulphate crystals from its solution; 4. sulphur from sulphur and charcoal; 5. iron from iron and lead.
Show answer
Answer:
| Item | Technique |
|---|---|
| 1 | c. Fractional distillation |
| 2 | d. Sedimentation |
| 3 | b. Crystallization |
| 4 | a. Evaporation, with a suitable solvent (carbon disulphide) |
| 5 | e. Magnetic separation |
Teacher's Note: Pair 4 uses a solvent that dissolves only sulphur; the matching key given is a. Evaporation.
20. Draw labelled diagrams of: kerosene from kerosene and water; salt from sea water; chalk powder from chalk and water; ammonium chloride from a mixture of ammonium chloride and sodium chloride.
Show answer
Answer: Kerosene from water: separating funnel (see the diagram above). Chalk from water: filtration (see the diagram above). Salt from sea water: heat the water in a china dish until the water evaporates and salt is left. Ammonium chloride: heat the mixture in a china dish covered by an inverted funnel with cotton in its stem; ammonium chloride sublimes and sticks to the funnel, leaving sodium chloride.
Teacher's Note: I have drawn the two most-asked diagrams; the other two are described.
E. Define with Examples
21. Define: sublimation, crystallization, evaporation, filtration, decantation, winnowing, with suitable examples.
Show answer
Answer: Sublimation: solid to gas directly, as with camphor. Crystallization: crystals forming from a saturated solution, as with copper sulphate. Evaporation: liquid changing to vapour at the surface, leaving the solid, as salt from sea water. Filtration: insoluble solid separated by filter paper, as with sand and water. Decantation: pouring off the clear liquid, as from muddy water. Winnowing: wind separates husk from grain.
Teacher's Note:
F. Diagram Question
22. Write the name of the process in the diagram and label the markings.
Show answer
Answer: The diagram printed in the worksheet is not available in the text. It is most likely distillation or filtration; use the labels in the diagrams on this page (funnel, filter paper, residue, filtrate) for filtration, or flask, condenser, water in and out, distillate for distillation.
Teacher's Note: I am not certain which diagram was printed, so please check against your worksheet.
Free study material for Science
Practice Worksheet and Study Resources for Class 8 Science Chapter 08 Nature Of Matter Elements, Compounds, And Mixtures
Chapter 08 Nature Of Matter Elements, Compounds, And Mixtures Printable Worksheet for Class 8 Science
Explore reliable practice questions for Chapter 08 Nature Of Matter Elements, Compounds, And Mixtures tailored for Class 8 Science learners. Use these structured worksheets to evaluate preparedness and strengthen problem-solving skills.
How to Use These Practice Sheets
Built using the official NCERT book for Class 8 Science, these practice materials provide reliable academic guidance. Pair your practice with our recommended NCERT solutions to master optimal problem-solving approaches.
Enhance Speed with Online Practice
Wrap up your chapter revision by testing your knowledge against standard question formats. Everything on our platform is provided free of charge.
FAQs
You can download the teacher-verified PDF for CBSE Class 8 Science Elements Compounds and Mixtures Worksheet Set 01 from StudiesToday.com. These practice sheets for Class 8 Science are designed as per the latest CBSE academic session.
Yes, our CBSE Class 8 Science Elements Compounds and Mixtures Worksheet Set 01 includes a variety of questions like Case-based studies, Assertion-Reasoning, and MCQs as per the 50% competency-based weightage in the latest curriculum for Class 8.
Yes, we have provided detailed solutions for CBSE Class 8 Science Elements Compounds and Mixtures Worksheet Set 01 to help Class 8 and follow the official CBSE marking scheme.
Daily practice with these Science worksheets helps in identifying understanding gaps. It also improves question solving speed and ensures that Class 8 students get more marks in CBSE exams.
All our Class 8 Science practice test papers and worksheets are available for free download in mobile-friendly PDF format. You can access CBSE Class 8 Science Elements Compounds and Mixtures Worksheet Set 01 without any registration.