Foundation Olympiad Class 8 NSO 5-Year E-book 14
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Foundation Olympiad Class 8 NSO 5-Year E-book 14

Science

13 Qs

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During the electrolysis of dilute sulphuric acid, it splits into :

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A piece of calcium metal is placed in water. A reaction takes place in which bubbles of hydrogen gas are seen. After the reaction stops, the solution is tested for its colour, temperature and action with litmus solution. Select the correct observation

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Four test-tubes were set up as shown in the following options. Each piece of iron was protected on one side by coating of different materials. In which test-tube is the iron least likely to rust?

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Observe the chemical reactions taking place in two test tubes X and Y. Which two gases are evolved in test tubes X and Y respectively?

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Which of the following is correct regarding the given Venn diagram?

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Read the given statements.
(i) Ingestion in Hydra occurs with the help of pseudopodia.
(ii) Bile juice is secreted by gall bladder and stored in liver.
(iii) In humans, digestion of starch starts in the mouth.
(iv) The outer covering of teeth is called as enamel and is the hardest substance in human body.
(v) Omasum is the largest chamber of ruminant stomach where food is stored.
Which of the above statements are incorrect?

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Identify P, Q, R, S and T in the given flowchart and select the correct option.

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Match column-I with column-II and select the correct option from the codes given below.
Column - IColumn - II
(a)Phloem(i)Contain respiratory pigment
(b)Arteries(ii)Translocation of food in plants
(c)  Red blood cells(iii) Carry oxygenated blood away from the heart
(d) Xylem(iv)Have thin walls
(e)Veins(v)Conducts water from roots to leaves

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The given diagram shows respiratory system of man.Which of the following correctly shows the functions of the parts labelled W, X, Y and Z?

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The change in number of two species X and Y belonging to the same food chain over a period of time is shown in the given graph. Which of the following best identifies the organisms?

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Correct the given statements by replacing the underlined words and select the correct option.

(i) The viscous fluid present in the nucleus is called cytoplasm.
(ii) Vacuoles are rod shaped structures which oxidize food to provide energy.
(iii) Mitochondria contain green pigment chlorophyll and take part in photosynthesis.
(iv) Lysosomes take part in synthesis of protein.

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Identify X, Y and Z in the given flowchart and select the correct option.

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Refer the given flowchart and identify X, Y and Z.

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Science

13 Qs

Related Questions to study

When pressure is applied through a piston at the top of a closed tube containing water, the pressure is transmitted to:

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Which of these represents the correct order of planets in the solar system in relation to the Sun?

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Study the table carefully. Which of the above are correctly matched?

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Observe the given flowchart carefully and mark the appropriate option correctly representing I, II and III.

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The shape of the bacteria shown in the figure is

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Which of the following is not a forest product?

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Sumana prepared maida dough by taking 1/2 kg flour to which she added some sugar, mixed with warm water and at the end added a small amount of yeast powder. After two hours, she observed that the dough got raised. Which of the following is correct regarding this?

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A habitat change may result in the decline in the numbers of a given species. Such species slowly become P. This means that the species are on the verge of becoming Q. Some animals whose number has gone down to critically low levels are called R. A species is considered S when no member of the species is still alive.
Which of the following is correct sequence for P, Q, R and S in the above paragraph.

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Anil wants to see microscopic view of the organelle which takes part in the transmission of hereditary characters from one generation to the next. Which labelled part will his teacher focus to make a microscopic view of the organelle?

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The given figures show the feet of four different birds. They are variously adapted according to their respective functions. Which of the following is correct regarding this?

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Ritu, Shweta and Urvashi want to find out who among them has the largest lung capacity. They decide to blow air into a balloon in one breath and see how big it becomes. Which of the following factors must they keep same to make the test a fair one?
(i) Colour of the balloon
(ii) Size and shape of the balloon
(iii) Whether to breathe in before blowing
(iv) Material of the balloon

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Which of the following is not the adaptation of polar bear for the extreme climate in polar regions?

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Megha and Farheen were performing an experiment on plant reproduction. They both placed a potato in the soil and observed the changes after few days. Which of the following will they observe?

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Science

15 Qs

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Which of the following planets can be seen with the naked eye?

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Sudha took a small amount of sulphur in deflagrating spoon and heated it over a burner. As soon as it started burning she put it in a gas jar and covered with a lid. After sulphur stopped burning she added a small amount of water in it and dissolved the gas in water by shaking it. She then tested the solution with red and blue litmus paper. What did she observe?

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Ramesh mixed some iron filings with sulphur powder in a China dish. In another dish, he mixed iron filings and sulphur powder and heated the mixture. Which of his observations is not correct?

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Three experiments to investigate the reactivities of three metals are shown.
What is the correct order of reactivity (most reactive least reactive) for these three metals ?

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Four experiments on rusting are shown in the figure.
Which two experiments can be used to show that air is needed for iron to rust?

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Select the correct option which on rearranging gives the term for the groundwater stored between layers of hard rock below the water table.

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Observe the given apparatus carefully showing an activity performed to compare the carbon dioxide content of inhaled and exhaled air.What would be the observation for T1 and T2 test tubes and itscorrect explanation? [(+) indicates milky colouration in limewater]
 Explanation

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A schematic representation of the blood circulation is given. Which circulatory parts are incorrectly placed in it?

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The given figure shows different layers of a forest labelled as W, X, Y and Z. Which layer is the habitat of many animal species like monkeys, orangutans, toucans and sloths as there is plenty of food available?

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Namita's mother does not allow her to lie on the abdomen immediately after having food. What could most likely be the reason for this?

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Latika observed her grandmother adding lots of salt on unripe mangoes to prepare pickles. Her grandmother also added an excess of oil in the pickle jar. What could be the reason for it?

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Look at the given cell carefully. Identify the function of the part labelled Y.

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Match Column-I with Column-II and select the correct option from the codes given below.
Column - IColumn - II
(a)Jim Corbett National Park(i)Karnataka
(b)Kanha National Park(ii)Madhya Pradesh
(c)Kaziranga Wildlife Sanctuary(iii)Tamil Nadu
(d)Bandipur Sanctuary(iv)Uttaranchal
(e)Mudumalai Sanctuary(v)Assam

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Read the given statements and select the correct option.
Statement 1 : Aquatic animals produce large number of eggs and sperms necessary to ensure external fertilization.
Statement 2 : The eggs swim in water with the help of cilia, and fertilize the sperms.

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Which of these is a behavioral adaptation?

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Science

15 Qs

Related Questions to study

Two plane mirrors are inclined to each other at an angle of . If a ray of light incident on the first mirror is parallel to the second mirror, it is reflected from the second mirror

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The given figure shows a part of digestive system. Identify it and select its main function.

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A piece of ice is floating in a beaker containing water. When ice melts, the temperature falls from to  and the level of water:

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Select the correct option.

Statement 1: Wind pollinated flowers need to produce more quantities of pollen grains.
Statement 2: Seeds from cross-pollinated flowers produce weaker and less healthy plants.

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Which of these can be found in a tropical rainforest?

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Refer the given figure and select the option which correctly describes parts labelled as W, X, Y and Z.
Codes:
a. Contains hereditary materials.
b. Most chemical reactions occur here.
c. Made of mainly sugar molecules.
d. Partially permeable.

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Lunar eclipse occurs when earth comes in between sun and the moon. Solar eclipse occurs when moon comes in between sun and earth. This suggests that:

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Mrs Renu came to know about Mrs Sunidhi's pregnancy, but she became anxious as Mrs Sunidhi smokes badly. She knew that smoking may affect the health of the mother and developing foetus. Among the following, what are the consequences of smoking?
(i) Increased heartbeat and blood pressure in the mother due to release of adrenaline.
(ii) Increased blood supply to the placenta.
(iii) Blood clot formation in the arteries of the mother leading to the diffusion of CO and urea into the foetus' blood.
(iv) Reduced ability of haemoglobin to carry oxygen in the RBC, which may affect the development of the foetus' brain.

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Which of the following statements is incorrect for the organism shown in the figure?

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The given figure shows a beaker containing a solution of copper sulphate and two carbon electrodes. A battery is placed next to it. In order to plate the electrode E with Copper : 

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Which of the following groups represents the bacterial diseases?

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Match Column-I with Column-II and mark the correct option.
Column - IColumn - II
(a)Richter scale(i)Electric Charge
(b)Electroscope(ii)Amber
(c)Resin(iii)Earthquake

(d)
Electric current(iv)Flow of charges

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Any article of iron if left in open for some time, acquires a film of brownish substance (rust) having chemical formula:

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The given figure shows the nitrogen cycle. Match the following table according to the given figure and select the correct option.
BacteriaLetters
(a)Able to form nodules with plants(i)R
(b)Able to denitrify(ii)Q
(c)Able to nitrify(iii)S
(d)Able to use ammonium as energy source(iv)T
(e)Able to fix nitrogen from air(v)P

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Ms. Chopra, a science teacher prepared two solutions for practical test as follows:
Solution 1 : Dissolved the ash collected after burning the magnesium ribbon in water.
Solution 2 : Added dilute sulphuric acid to lime water. She asked a student to test the solutions with china rose indicator and write the change in colour. 
Choose the correct observation among the following.

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Science

10 Qs

Related Questions to study

Match the options given in Column A with Column B and mark the correct option.
Column AColumn B
(a)Electrolyte(i)Production of magnesium chloride
(b)Cathode(ii)Negatively charged electrode
(c)Electrolysis(iii)Copper sulphate solution
(d)Anode(iv)Connected to negative pole of battery

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Smita carried out some experiments with china rose petals. She placed china rose petals in a beaker and added some hotwater. She divided this solution into three test tubes and added acid to one, base to another and left the third one as such. But she forgot to label these test tubes. Identify the correct match for the solution in each test tube.

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Which of the following describes moulting?

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Match Column I with Column II and select the correct option from the codes given below.

Column IColumn II
(a)Endemic species(i)Species that exist in very small number
(b)Endangered species(ii)Species found exclusively in a particular area
(c)Vulnerable species(iii)Species that are likely to become endangered
(d)Rare species(iv)Species that are likely to get extinct in the near future

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Refer the given figure of a cell. Which organelle is more in number ? Also, identify among P, Q, R and S, the organelle which is responsible for transmission of hereditary information.

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Refer the given graph of menstrual cycle. What happens after day 28?

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Refer the given experiment. What can you conclude from it?

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How can plants prevent self pollination?

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The given figure shows a model demonstrating the mechanism of breathing. What is incorrect about the model?

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What is X in the given figure?

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Science

10 Qs

Related Questions to study

Match the following columns and select the correct option from the codes given below.
Column I  Column II
(i) Pressure  (p) Pattern formed due to multiple reflection
(ii) Decibel  (q) Unit of loudness
(iii) Richter  (r) Force per unit area
(iv) Kaleidoscope (s) Scale to measure intensity of earthquake

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Which of the following statements is true ?

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Choose the reactions which are not feasible.
I. Iron + Zinc sulphate Iron sulphate + Zinc
II. Magnesium + Silver nitrate  Magnesium nitrate + Silver
III. Copper + dil. sulphuric acid  Copper sulphate +
IV. Zinc + Ferrous sulphate  Iron + Zinc sulphate 

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Match the items in column I with their preservation methods in column II and choose the correct option from the codes given below.
Column IColumn II
(a) Amla(i) Sodium benzoate
(b) Vegetables(ii) Drying
(c) Squashes(iii) Cooling
(d) Spices(iv) Oil and vinegar
(e) Ketchups(v) Sugar
(vi) Salts

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The microorganism in the given figure is associated with which of the following functions?

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Statement I : All prokaryotes have a cell wall, eukaryotes do not.
Statement II : Prokaryotes have a true nucleus, eukaryotes have a primitive nucleus.

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Given below are some possible reasons for a sharp decline in population of the species given in figure. Which of the following are correct?
(i) Cleared forests 
(ii) Flooded large areas
(iii) Polluted air and water
(iv) Scarcity of food

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Cloning is the production of an exact copy of a cell, any other living part of a complete organism. A sheep named Dolly was the first mammal to be cloned by Ian Wilmut and his colleagues at the Roslin Institute in Edinburgh. Find out the incorrect statements about the cloning of Dolly.

(i) Dolly was born on 5th July 1996.
(ii) Dolly was given birth by the Finn Dorset sheep.
(iii) Dolly was found to be absolutely identical to the Scottish blackface ewe.
(iv) The nucleus of the mammary gland cell from the Finn Dorsett sheep was inserted into the egg of the Scottish blackface ewe whose nucleus had been removed.

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India contains globally important population of some of the Asia's rarest animals. Which of the following animals belong to that category?
(i) Marbled cat
(ii) Asiatic lion
(iii) Indian elephant
(iv) Bengal fox
(v) Indian rhinoceros
(vi) Asiatic wild ass

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A cell is considered to be a fundamental unit of life because___________________

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