CBSE Class 10 Science Term 1 Syllabus 2021-2022 (Revised) - Download Now!

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CBSE Class 10th Science Syllabus 2021-2022 (Term 1) is available here. Download the rationalised/revised syllabus and start preparing actively for the Term 1 Board Exam that will be held in November-December 2021.

CBSE Class 10 Science Revised Syllabus for the current academic session 2021-2022 is released by the board on its official website. The Board has bifurcated the Science syllabus for the two terms - Term 1 and Term 2. We are providing here the detailed curriculum of CBSE Class 10 Science for Term 1. Students must go through this revised syllabus and start their preparations for the first part of the CBSE Class 10 Board Exam 2021-2022, i.e, the Term 1 Exam that will be held in November-December.

General Instructions:

  1. The total Theory Examinations (Term I+II) will be of 80 marks and 20 marks weightage shall be for Internal Assessment (Term I+II).

  2. Internal Assessment - Maximum Marks 10 for each Term:

a. There will be Periodic Assessment that would include:

· Three periodic tests will be conducted by the school in the entire session. Average of the two periodic tests/marks of best periodic Test conducted in the Term is to be taken for consideration.

· Diverse methods of assessment as per the need of the class dynamics and curriculum transaction. These may include - short tests, oral test, quiz, concept maps, projects, posters, presentations, enquiry based scientific investigations etc.

b. Subject Enrichment in the form of Practical/Laboratory work should be done throughout the year and the student should maintain record of the same. Practical Assessment should be continuous. All practicals listed in the syllabus must be completed. c. Portfolio to be prepared by the student- This would include class work and other sample of student work.

Course Structure for CBSE Class 10 Science First Term 2021-2022:

Units Marks I Chemical Substances-Nature and Behaviour: Chapter 1, 2 and 3 16 II World of Living: Chapter 6 10 III Natural Phenomena: Chapter 10 and 11 14 Total 40 Internal Assessment 10 Total 50

Also Check CBSE Class 10 Revised Syllabus 2021-2022 for Term 1 & Term 2 (All Subjects)

Theme: Materials

Unit I: Chemical Substances - Nature and Behaviour

Chapter - 1 Chemical reactions and equations

Chemical reactions: Chemical equation, Balanced chemical equation, implications of a balanced chemical equation, types of chemical reactions: combination, decomposition, displacement, double displacement, precipitation, neutralization, oxidation and reduction.

Chapter - 2 Acids, Bases and Salts

Acids, bases and salts: Their definitions in terms of furnishing of H+ and OHions, General properties, examples and uses, concept of pH scale (Definition relating to logarithm not required), importance of pH in everyday life; preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris.

Chapter - 3 Metals and non-metals

Metals and nonmetals: Properties of metals and non-metals; Reactivity series; Formation and properties of ionic compounds.

Theme: The World of the Living

Unit II: World of Living

Chapter - 6 Life processes

Life processes: ‘Living Being’. Basic concept of nutrition, respiration, transport and excretion in plants and animals.

Theme: How Things Work

Unit III: Natural Phenomena

Chapter - 10 Light - Reflection and Refraction

Reflection of light by curved surfaces; Images formed by spherical mirrors, centre of curvature, principal axis, principal focus, focal length, mirror formula (Derivation not required), magnification.

Refraction; Laws of refraction, refractive index.

Refraction of light by spherical lens; Image formed by spherical lenses; Lens formula (Derivation not required); Magnification.

Power of a lens.

Chapter - 11 Human eye and colourful world

Refraction of light through a prism, dispersion of light, scattering of light, applications in daily life.


Practical should be conducted alongside the concepts taught in theory classes.



1.A. Finding the pH of the following samples by using pH paper/universal indicator:

(i) Dilute Hydrochloric Acid

(ii) Dilute NaOH solution

(iii) Dilute Ethanoic Acid solution

(iv) Lemon juice

(v) Water

(vi) Dilute Hydrogen Carbonate solution

B.Studying the properties of acids and bases (HCl & NaOH) on the basis of their reaction with:

a) Litmus solution (Blue/Red) b) Zinc metal c) Solid sodium carbonate Unit–I:(Chapter-2)

2.Performing and observing the following reactions and classifying them into:

A.Combination reaction B. Decomposition reaction C. Displacement reaction D. Double displacement reaction

(i) Action of water on quicklime

(ii) Action of heat on ferrous sulphate crystals

(iii) Iron nails kept in copper sulphate solution

(iv) Reaction between sodium sulphate and barium chloride solutions. Unit-I:(Chapter-1)

3.A. Observing the action of Zn, Fe, Cu and Al metals on the following salt solutions:

(i) ZnSO4(aq)

(ii) FeSO4(aq)


(iv)Al2 (SO4)3(aq)

B.Arranging Zn, Fe, Cu and Al (metals) in the decreasing order of reactivity based on the above result. Unit-I :(Chapter-3)

4.Experimentally show that carbon dioxide is given out during respiration. Unit-II:(Chapter-6)

5.Determination of the focal length of (i) Concave mirror and (ii) Convex lens by obtaining the image of a distant object. Unit-III:(Chapter- 10)

6.Tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. Measure the angle of incidence, angle of refraction, angle of emergence and interpret the result. Unit-III:(Chapter-10)

7.Tracing the path of the rays of light through a glass prism. Unit-III:(Chapter-11)


· Science-Text book for class X- NCERT Publication

· Assessment of Practical Skills in Science- Class X- CBSE Publication

· Laboratory Manual-Science-Class X, NCERT Publication

· Exemplar Problems Class X – NCERT Publication

Assessment Areas (Theory) 2021-22

(Class X)

Science (086)

Maximum Marks: 80

Competencies Marks Demonstrate Knowledge and Understanding 46% Application of Knowledge/Concepts 22% Analyze, Evaluate and Create 32%

Note: ·Internal choice would be provided.

Internal Assessment – Term I and II (10 Marks each)

· Periodic Assessment - 03 marks

· Multiple Assessment - 02 marks

· Subject Enrichment (Practical Work) - 03 marks

· Portfolio - 02 marks·

You may also check the old or combined syllabus of CBSE Class 10 Science to understand the changes the board has made to the syllabus and know how topics have been bifurcated for the two terms. Link to the old syllabus is given below:

Also Check: CBSE Class 10 Science Best Study Material for 2021-2022 Session

The 9 Best Soaps For Soft Water

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If you have soft water in your home, you have a lot of options when it comes to soap. “Most everything will work well in soft water,” Stephanie Greenwood, long-time soap maker and founder of Bubble & Bee Organic, tells Bustle. However, soft water does make it harder to rinse soap away, and according to Elizabeth Mullans, M.D., a Board-certified dermatologist and founder of Uptown Dermatology, you should “be mindful of soaps and opt for one that is fragrance-free.” That’s why the best soaps for soft water use gentle formulas that are free from synthetic fragrances and wash away easily, whether you’re bathing, washing the dishes, or doing a load of laundry.

When choosing a soap, it helps to understand the difference between hard and soft water. Hard water contains a high amount of calcium and magnesium, which creates soap scum and requires more detergent to get things clean. “Soft water does not contain the amount of minerals that hard water does, so you will need less detergent to get your clothes clean,” Dr. Mullans tells Bustle. But 85% of the United States has hard water and many manufacturers add chelating agents such as ethylenediaminetetraacetic acid (EDTA) to improve soap’s performance, which can cause skin irritation for some people. With soft water, you can choose a soap that’s free from EDTA and other potentially irritating ingredients. Similarly, soap-free, synthetic detergents are a good choice if your skin is easily irritated. The best ones still “give you loads of lather and a clean rinse,” according to Greenwood, adding: “Organic and natural soaps will work better in soft water than in hard water, so if you’re looking for more natural options, soft water is your friend.”

With all that in mind, scroll on for the best soaps for soft water, including body wash, hand soap, and dish and laundry detergents.

1 The Overall Best Cleansing Bar CeraVe Hydrating Cleanser Bar (3-Pack) Amazon $14 See On Amazon This soap-free CeraVe cleansing bar is noncomedogenic and free from parabens and fragrance, though it does contain EDTA. The formula is accepted by the National Eczema Association, so it’s gentle enough for sensitive skin and can be used on the face, body, and hands. The cleansing bar contains ceramides and hyaluronic acid to help skin retain moisture and maintain its natural barrier. Each bar also contains 5% of CeraVe’s moisturizing cream to hydrate skin. The body bar is an Amazon favorite, with an overall 4.8-star rating after more than 7,000 reviews. One positive review: “I like the softness and moisture on my skin after using this product. Has just enough foaming to feel clean but no sticky residue left on skin.”

2 The Derm’s Pick Liquid Laundry Detergent Arm & Hammer Free & Clear Liquid Laundry Detergent, 50 Oz. Amazon $9 See On Amazon Dr. Mullans recommends this gentle liquid laundry detergent, which has been specially formulated for sensitive skin and dermatologist-tested. The 100% SkinSAFE product is free from fragrances, dyes, and other potential irritants (though it does contain EDTA), so it removes dirt and odor from your laundry and rinses away clean. Plus, the low-suds formula works in High Efficiency (HE) washing machines. One positive review: “Arm and Hammer is my first choice of detergent. I especially like the no-fragrance A&H. It’s more effective with heavy soil and doesn’t irritate my skin. The High Efficiency works really well with our washer and is reasonably priced.

3 The Best Body Wash Eucerin Advanced Cleansing Body and Face Cleanser, 16.9 Oz. Amazon $9 See On Amazon If you prefer a liquid cleanser, this soapless Eucerin face and body wash is an excellent choice since it’s free of fragrances, dyes, and EDTA. It’s also formulated to help skin retain its pH balance, and is designed to rinse clean without leaving behind any residue. Plus, it’s backed by a 4.7 overall star rating on Amazon with more than 4,000 reviews. One positive review: “I was so surprised at how much lather I got from just a small amount. Leaves you with a great clean feeling and no irritation.”

4 The Best Hand Soap Kirk’s Castile Liquid Soap, 12 Oz. Amazon $8 See On Amazon This coconut-based castile soap is free of artificial fragrances, dyes, parabens, and EDTA. The soap uses a vegetable fermentation process that actually removes odors like onion, garlic, and fish, making it a great choice for the kitchen. The soap is formulated with coconut and aloe vera to create a creamy, soothing lather, and is safe to use for sensitive skin types. Though this version is scent-free, the liquid soap is also available in Lemon & Eucalyptus, Rosemary & Sage, and a variety pack. One positive review: “I was looking for something that did not have fragrance, was not anti-bacterial, and this has good reviews. I was not expecting this, but this is the only soap I have ever used that rinses off easily with soft water. That was a nice surprise. I’m sold. We put a dispenser at each sink.”

5 The Best Facial Cleanser CeraVe Hydrating Facial Cleanser, 16 Oz. Amazon $14 See On Amazon Another great CeraVe product, this non-foaming facial cleanser has an overall 4.7-star rating on Amazon as well as an incredible 50,000-plus reviews. It’s formulated with ceramides and hyaluronic acid to help skin retain moisture and has a non-greasy feel, which is especially important for soft water. The cleanser is paraben-, fragrance-, and soap-free but does contain EDTA. It’s also noncomedogenic and accepted by the National Eczema Association. One positive review: “I absolutely love this stuff! No more greasy residue on your face after using a typical face wash. This cleaner is light weight and leaves your skin feeling clean.”

6 The Best Natural Bar Soap Aspen Kay Naturals Organic Turmeric Soap, 4.5 Oz. Amazon $10 See On Amazon This natural bar soap contains organic turmeric root powder, which has anti-inflammatory properties, and organic turmeric extract and essential oil. Other nourishing ingredients include olive oil, shea butter, and chamomile extract. The soap is great for soft water, EDTA-free, and can be used on both the face and body. While this natural cleanser is gentle, it’s not soap-free and the essential oils leave a fragrance, so it might not be the best for those with very sensitive skin. One positive review: “This stuff is so good I actually went back and ordered two more! Skin is glowing, smooth, and clear. It’s very gentle and I also love that it removes makeup very well. The smell is very earthy yet refreshing.”

7 The Best Dish Soap Seventh Generation Dish Soap Free & Clear, 19 Oz. (6-Pack) Amazon $17 See On Amazon This gentle dish soap effectively removes grease and residue from your dinnerware while being easy on your skin. The plant-based liquid soap is free of fragrance, dye, EDTA, and other harsh ingredients. It’s also USDA-certified as a 95% Biobased Product and has a 4.7-star rating overall after more than 19,000 reviews on Amazon. However, the soap is not meant to be used with an automatic dishwasher. One positive review: “Have used this brand for the last couple years. It does a good job of cleaning without leaving any scent on dishes or glassware. It’s easy on the hands, too. A little bit makes a nice amount of suds in soft water, and I don’t see any spots on the things I wash by hand and let air dry.”

8 The Best Dishwasher Pods Seventh Generation Fragrance-Free Dishwasher Pods (2-Pack, 45 Count) Amazon $25 See On Amazon Also from Seventh Generation, these detergent pods are a great option if you have soft water and use a dishwasher. The pods are free of fragrances, dyes, phosphates, chlorine bleach, and EDTA and are USDA-certified as 78% bio-based. The enzyme-rich formula cuts through grease and food residue, without leaving any spots behind. It’s backed by an overall 4.7-star rating and more than 5,000 reviews on Amazon. One positive review: “I am a big fan and supporter of Seventh Generation and this is one of my favorite products. It doesn’t leave white residue on your dishes and gives them a good clean without any food left over.”

9 A Natural Powder Laundry Detergent Molly’s Suds Original Laundry Detergent Powder, 47 Oz. Amazon $14 See On Amazon The low-sud formula of this laundry powder is free from synthetic fragrance, dyes, EDTA, optical brighteners, phosphates, and other additives. It’s safe to use on all fibers except silk and leather. It can be used with HE washing machines, however, it needs warm water to fully dissolve and go to work. The concentrated formula means each bag should last for about 70 loads. With more than 7,000 reviews and a 4.7-star overall rating, it’s a popular choice with Amazon customers, and you can choose from peppermint, rosé, and unscented formulas. One positive review: “I’m really impressed with this product. My laundry is cleaner and brighter. I have tried other environmentally friendly laundry products. Molly’s Suds is superior to all of them. I like how little product is needed for an average laundry load. This is saving me lots of money, also!”


Stephanie Greenwood, founder of Bubble & Bee Organic

Elizabeth Mullans, M.D., a board-certified dermatologist and founder of Uptown Dermatology

Get major markdowns on top-rated beauty products at the Dermstore Anniversary Sale

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— Recommendations are independently chosen by Reviewed’s editors. Purchases you make through our links may earn us a commission.

Looking to refresh your skincare routine or cosmetic bag? There’s no better time to do that than during a sale—and Dermstore has you covered on all things makeup, skincare and hair care. From August 8 through 17, Dermstore is running a massive Anniversary sale where you can snag deep discounts on brands like Olaplex, Paula’s Choice, Estée Lauder and more from the online beauty retailer.

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During the Dermstore Anniversary Sale, you can get up to 25% off beauty favorites using the code CELEBRATE. We’ve scoured the site and called out a few of our favorite products you can get on sale right now.

These are the top 10 deals you can shop at the Dermstore Anniversary Sale.

  1. Save $21: Olaplex Anniversary Exclusive

Olaplex catapulted to the forefront of many beauty lovers’ wish lists because of its products that claim to “correct damaged hair.” During the sale, Dermstore offers this kit that contains the No. 3 Hair Perfector, a pre-shampoo treatment that claims to reduce breakage; the No. 0 Intense Bond Building Hair Treatment that claims to rebuild the hair’s bonds and strengthen it; the No.4 Bond Maintenance Shampoo that claims to hydrate; and the No. 8 Bond Repair Mask that moisturizes for smoother locks. If you bleach, dye or use hot tools on your hair, this kit can help strengthen your strands.

Get the Olaplex Anniversary Exclusive 4 piece for $69 (Save $21)

  1. Save $17.25: Colorescience Sunforgettable Total Protection Brush-On Shield SPF 50

You’re likely familiar with how important it is to wear sunscreen every day to protect your skin from the sun’s harmful UV rays. But just as important is keeping up with reapplication. To make the process easier, try this brush-on powder sunscreen from Colorescience that comes in fair, medium, tan and deep matte shades to suit your skin tone. Colorescience is 25% off during the sale, so you can snag other sun protection products at a discount.

Get the Colorescience Sunforgettable Total Protection Brush-On Shield SPF 50 for $51.75 (Save $17.25)

  1. Save $4.30: Estée Lauder Double Wear Stay-in-Place Makeup

If you still haven’t found a foundation that has a natural-looking finish but covers redness, blemishes and discoloration, look no further than this one from Estée Lauder. The liquid formula has a full coverage, natural-matte finish and is available in 56 shades with cool, neutral and warm undertones. It claims to control oil for up to 24 hours and we found that it didn’t budge or transfer onto a face mask. Right now, all Estée Lauder products are 10% for the sale.

Get the Estée Lauder Double Wear Stay-in-Place Makeup for $38.70 (Save $4.30)

  1. Save $54.25: Living Proof Dermstore Exclusive Frizz-Free Kit

This line from Living Proof claims to keep your hair looking pristine and frizz-free. The Dermstore-exclusive set includes the No Frizz Shampoo to cleanse the hair, the No Frizz Conditioner to condition and prevent frizz, the No Frizz Intense Moisture Mask to deeply moisturize the hair, the No Frizz Nourishing Style Cream to smooth the strands and block humidity, and the No Frizz Instant De-Frizzer to soften and add shine. You can also grab certain Living Proof products for 25% during the sale.

Get the Living Proof Dermstore Exclusive Frizz-Free Kit 5 piece for $51.75 (Save $54.25)

  1. Save $4.43: Paula’s Choice Skin Perfecting 2% BHA Liquid Exfoliant

Few beauty products are revered like this one from Paula’s Choice. This liquid formula claims to chemically exfoliate the skin with salicylic acid to keep pores unclogged and the skin looking bright and clear. Plus, it’s gentle enough for use in the morning and at night. The Paula’s Choice brand is 15% off during the sale.

Get the Paula’s Choice Skin Perfecting 2% BHA Liquid Exfoliant for $25.07 (Save $4.43)

  1. Save $10: Aquis Waffle Luxe Hair Turban

This Aquis hair towel claims to cut down on your hair’s drying time by 50%, which Reviewed’s tester found to be true while testing the Waffle Luxe. It should also minimize frizz and breakage with its ultra-soft feel. The towel works for all hair types, from straight strands to curly locks, and it has a tapered shape and button closure to fit securely around the head.

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  1. Save $30: PMD Dermstore Exclusive Purely Clean Pro Jade Bundle

Let’s be honest: Most people don’t enjoy washing their face, but it’s a necessary task for a clean, clear complexion. To upgrade the experience, Reviewed tested face cleansing brushes and named the PMD Clean its Best Overall because it’s easy to hold and maneuver around the face, comes with a convenient charging cradle and is easy to clean, thanks to its silicone material. This kit includes a makeup-removing cloth and the updated PMD Clean Pro that has the same lovable features.

Get the PMD Dermstore Exclusive Purely Clean Pro Jade Bundle for $179 (Save $30)

  1. Save $11.80: Dermalogica Daily Microfoliant

To keep your skin feeling ultra-smooth, try the top-rated Dermalogica Daily Microfoliant. The product claims to even the skin tone with licorice, grapefruit and phytic acid; remove excess oil and reduce texture and pores with papain enzymes and salicylic acid; and soothe redness with colloidal oatmeal. Scoop half a teaspoon of the powder into wet hands to create a paste and then massage it into the face before rinsing it away. Find other Dermalogica products on sale for 20% off through the sale.

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  1. Save $32: Briogeo Dermstore Exclusive Scalp Revival Soothe Detoxify Duo

Your scalp needs exfoliation, too. This duo from Briogeo contains the popular Scalp Revival Charcoal + Coconut Oil Micro-Exfoliating Shampoo, which claims to soak up oil and rid the hair of product buildup with ingredients like charcoal, and the Scalp Revival Charcoal + Tea Tree Cooling Hydration Scalp Mask, which hydrates the hair and soothes an itchy, flaky scalp. Briogeo’s products are25% off during the sale.

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  1. Save $8: BareMinerals Original Loose Mineral Powder Foundation Broad Spectrum SPF 15

This BareMinerals powder foundation is a must-try, whether you have oily skin and prefer a powder formula or want to set your liquid makeup down while adding coverage. This claims to be buildable from sheer to full coverage, depending on how much you layer on the skin, and it comes in 30 shades ranging from fair to deep. Tap the powder into the jar cap, pick up a small amount with a makeup brush and dust it onto the face. Find even more BareMinerals products on sale for 25% off.

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Prices were accurate at the time this article was published but may change over time.