CBSE Class 10 - Pre SA2 Science Sample Question Paper (2016-17)(#cbsepapers)

CBSE Class 10 - Pre SA2 Science  Sample Question Paper (2016-17)

CBSE Class 10 - Physics - The Human Eye and Colourful World (Very Short Q and A)(#cbsenotes)

The Human Eye and Colourful World

Very Short Q and A


Question 1: Name the essential parts of a human eye.

Answer: Cornea, Iris, Pupil, eye lens, ciliary muscles and retina.


Question 2: What is cornea??

Answer: Spherical membrane covering the front of the eye


Question 3: Which liquid fill the space behind the cornea?

Answer: Aqueous humour


Question 4: Which liquid fills the space between lens and retina?

Answer: vitreous humour


Question 5: How is the eye lens held in its position?

Answer: By Ciliary muscles which hold the eye in position.

CBSE Class 10 - Marking Scheme Of SA2 Science Sample Question Paper (2016-17)(#cbsepapers)

CBSE Class 10 - Marking Scheme Of (SA2) Science Sample Question Paper (2016-17)

☛See Science Sample Question Paper (2016-17)

CBSE Class 10 - Science Sample Question Paper (2016-17) (#cbsepapers)(#cbsenotes)

CBSE Class 10 - Science Sample Question Paper (2016-17)

☛See also Marking Scheme of SA2 Science Sample Question Paper (2016-17)

CBSE Class 10 - Science Pre-board SA2 Sample Question Paper (2016-17)

CBSE Class 10  - Science Pre-board SA2 Sample Question Paper (2016-17)

CBSE Class 10 - Science - Management of Natural Resources - Very Short and Short Q and A (#cbsenotes)

Management of Natural Resources 

Very Short and Short Q and A from CBSE Papers 


Q1: What is coliform ?

Answer: It is a group of bacteria found in human intestine.


Q2: List any four stakeholders which may help in the conservation of forests.

Answer: People, the government, industrialists and Wildlife and nature enthusiasts.


Q3: What is reuse strategy ? Reuse strategy is considered better than the recycling strategy. Why ?

Answer: In reuse strategy, things are used again and again instead of throwing them. It is better than recycling of objects as no energy is used in this strategy for remaking of objects.


Q4: India has more than 50,000 strains of rice. Mention the level of biodiversity it represents.

Answer: It is a genetic variation within the species.


Q5: What do the three R’s refer to save the environment ? Which one of these would be the best for environment ?

Answer: Three R’s refers to Reduce, Recycle and Reuse.
Reducing wastage of energy is the best for environment.

Class 10 - Biology - How Do Organisms Reproduce? - Worksheet

Reproduction 

Longitudinal Section of a Bisexual Flower
Label the parts of the flowers (answer given in this post)
image credits: wikimedia

Worksheet

Fill in the blanks


1. In _________, many bacteria and protozoa simply divide into two or more daughter cells.


2. __________ is associated with the stability of population of species.


3. The fertilized egg gets implanted in the lining of the ________.


4. In mammals, the embryo gets nutrition from the mother’s blood with the help of a special tissue called _________.

Class 8, 10: Science - Uses of Some Common Metals and Non-Metals

Uses of Some Common Metals and Non-Metals

USES OF SOME COMMON METALS

Metal	Main Uses
Iron	Bridges, Train tracks, Construction Bars, Steel, Engine Parts, Iron sheets etc.
Copper	Electrical Wires, Utensils, Coins etc.
Aluminium	Electric Wires, Utensils, Airplanes, Metallic Paints, Foil for packaging etc.
Silver	Jewellery, Electroplating, photography, Utensils, Coins, silvering of mirrors etc.
Gold	Jewellery and Decorations, Coins
Lead	Batteries, Alloys, Paints, Alloys like solder, Protective screen for X-Rays etc.
Mercury	Thermometers, Barometers, Dental amalgams etc.

CBSE Class 10 - Science- SA1- Sample Question Paper (2016)

CBSE Class 10 - Science- SA1- Sample Question Paper (2016) 

CBSE Class 10 - Science - CH7: Control and Coordination (VSQA)

CONTROL AND COORDINATION

Very Short Question And Answers

Q1: Which chemical induces artificial ripening of fruits?

Answer: Ethylene


Q2: What is stimulus?

Answer: The changes in the environment to which an organism responds and reacts is called stimulus.


Q3: Name the longest cell present in the human body.

Answer: Neuron is the longest cell in the human body.


Q4: Give examples of glands which act as both endocrine and exocrine.

Answer: Pancreas, Testes, Ovaries


Q5: What are nastic movements?

Answer: Movements of plants which are independent of stimuli are called nastic movements. e.g. movement by Touch-Me-Not (Mimosa) plant i.e. leaves close or droop when touched.


Q6: Where do you find gustatory receptors?

Answer: On the tongue.


Q7: What do olfactory receptors detect?

Answer: They detect smell.


Q8: Name the hormone released by thyroid gland.

Answer: Thyroxin.


Q9: Where is Hypothalmus is located?

Answer: In the brain.

CBSE Class 10 - Physics - CH 12 Electricity (Worksheet)

Electricity

Worksheet

Fill in the blanks

1. The source of all electricity is ______. It’s SI unit is _________.


2. The net charge flowing through a cross section of a conductor in unit time is called ________.


3. Electric potential difference between points in an electric circuit is the ______ _______ to move a unit charge from one point to other. i.e. 1V = ____/1C.


4. Current is measured in Amperes using _______.


5. If 90 coulombs charge passes through the conductor for 5 minutes, then the current in the conductor is _____.


6. A _________ is an electronic measuring instrument the combines several measuring functions (electric potential difference, electric current and electric resistance) in one unit.

CBSE Class 10 - Science- SA2- Sample Question Paper (2016)

CBSE Class 10 - Science- SA2- Sample Question Paper (2016) 

CBSE Class 10 - Biology - Heredity and Evolution - Do Not Miss These Important Definitions and Terms

Heredity and Evolution

Important Definitions and Terms

Q1: Define Genetics

Answer: Genetics is the branch of Biology which deals with the study of heredity and variation.


Q2: Define Heredity

Answer: Heredity refers to process by which certain features (inheritable) are transmitted from parent to offspring.


Q3: Define Variation

Answer: Offspring of same parents do not exactly resemble each other as well to their parents. It is called variation.


Q4: What are analogous organs?

Answer: The organs that have same functions but different structures and origin are called analogous organs. e.g. the wings of a bat and the wings of an insect are analogous.


Q5: What are homologous organs?

Answer: The organs that have the same structure, origin and components but may be performing different functions are called homologous organs. Eg: hands of a human and the forelimbs of a horse.


Q6: What are vestigial organs?

CBSE Class 10 - Science- SA2- Sample Question Paper (2016) and Marking Scheme

CBSE Class 10 - Science- SA2- Sample Question Paper (2016) and Marking Scheme

CBSE Class 10 - Science - Four New Elements Added In Periodic Table

Four New Elements Added In 

Periodic Table

Time to update Chemistry Textbooks. On December 30, IUPAC completes the verification of discoveries of four new chemical elements. It completes the 7 periodic row.

The atomic numbers of these four new elements are 113, 115, 117 and 118. Soon the new names will be given to these elements. At present these elements have temporary names i.e.

Ununtrium 113, 
Ununpentium 115, 
Ununseptium 117, 
Ununoctium 118 

CBSE Class 10 - Science - CH 16 - Management Of Natural Resources (Question Bank)

 Management Of Natural Resources 

Nature Conservation is Our Duty

(Question Bank)

Very Short Questions (1 Mark Each)

Q1: What is a natural resource? Give two examples.

Q2: Define sustainable development.

Q3: What does the three R’s stand for to save the environment?

Q4: What do you mean by water – shed management?

Q5: Name the award recently instituted by govt. of India in the memory of Amrita Devi Bishnoi.

Q6: Name the bacteria whose presence in the water indicates its contamination with disease causing microbes.

Q7: Define Bio-diversity.

Q8: Why fossil fuels should be used judiciously?

Q9: Which canal has brought greenery to the areas of Rajasthan?

Q10: State the advantage of constructing a dam across a river?

Q11: Name the place where “Chipko Andolan” organised.

CBSE Class 10 - Physics - Reflection of Light By Plane and Spherical Mirrors (V Short Q and A)

Reflection of Light By Plane and Spherical Mirrors

Laughing Mirrors use combination of Spherical Mirrors and Plane Mirrors.
Is this image real or virtual?

Very Short Question Answers (Based on NCERT Chapter)

Q1: What is the position of the object, when we get a diminished image with a concave mirror?

Answer: Beyond C (centre of curvature)

Q2: What are Marginal rays?

Answer: The rays which strike the mirror surface near the periphery are called marginal rays.

Q3: What type of rear mirrors are used by drivers in automobiles?

Answer: Convex mirrors

Q4: What is the relation between the radius of curvature (R) and focal length (f) of a concave mirror?

Answer: R = 2f

Q5: What is a focal length in case of spherical mirrors?

Answer: It is the distance between focal length and focus.

Q6: An object is moving with a speed v towards a plane mirror, what is the speed of the image?

CBSE Class 10 - Biology - CH8 - How do Organisms Reproduce? (Very Short Q and A)

How do Organisms Reproduce?

Very Short Q & A Based on CBSE Question Papers 

Q1: Name the scientist who used the Latin phrase "Omnis cellula e cellula," means "Every Cell From a Cell"?

Answer: Rudolf Virchow, a German Scientist who emphasised that cell produces cells.


Q2: Does Cell Division play an important role in reproduction?

Answer: Yes. It plays important role in both prokaryotes and eukaryotes. It is important in following two ways:
i.  gives rise to a new organism or daughter cell.
ii. in multicellular prokaryotes, cell division renews and repairs cells that die from wear and tear.


Q3: Give an example cell division occurs in human body for continuity of life?

Answer: Bone marrow continuously produce new blood cells.


Q4: What is the crucial function of cell division?

Answer: To pass genetic material (DNA copy) to offspring cellular apparatus.


Q5: What are the types of cell division? Give examples of each

Answer: There are two types of cell division:
i.  Mitotis : This cell division occurs in most of the cells of the body. Parent cells divides into two (or more) offspring cells passing on identical copies of DNA (genetic material).
ii Meosis: This cell division occurs in cells of reproductive organs (called male and female gametes). Each offspring cell contains half copy of DNA material froms its parent cell. When these male and female gametes fuse together, it gives rise to new organism.

CBSE Class 10 - Science- SA1- Sample Question Paper (2015-16) - Set2

CBSE Class 10 - Science- SA1- Sample Question Paper (2015-16) Second Set

CBSE Class 10 - Science- SA1- Sample Question Paper (2015-16)

CBSE Class 10 - Science- SA1- Sample Question Paper (2015-16)