SEE Science New Model Question 2079

 

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NEW Question Collection 2080

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OLD Science Model Questions

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Science 1

 

Set(1)

Grade: Ten                   FM: 75

Subject: Science                                                          Time: 2:15 hrs.

Candidates are required to give their answers according to the given instruction.

 

Attempt all the questions:

 

Group "A"15×1=15

1. Write short answer the questions.

a)  What is universal gravitational constant?

    ljZjJofkL u'?Tjfsif{0f cr/ eg]sf] s] xf] <

b) State Pascal's law. kf:snsf] lgod n]Vg'xf];\ .

   c) Write an equation to show nuclear fusion .

    Go'lSno/ ˆo'hgsf] ;lds/0f n]Vg'xf];\ .

d) What is meant by accommodation of eye?

    cfFvfsf] ;dfof]hg eGgfn] s] a'lemG5 <

e)  Define 1 unit of electricity. Ps o'lg6 wf/fljw'tsf] kl/efiff n]Vg'xf];\ .

f) What is the relationship between size of atoms and reactivity in case of non-metals?k/df0f'x?sf] cfsf/ / /f;folgs ;ls|otfsflarcwft'x?df s:tf] ;DaGw x'G5 <

g) Write an example of endothermic reaction.

    tfkzf];sk|ltls|ofsf] Pp6fpbfx/0f lbg'xf];\ .

h) Write down the structural formula of ethane and butene.Oy]g / Ao'6Lgsf] ;+/rgfTds ;'q n]Vg'xf];\ .

i)   Write any two adverse effects of chemical pollution.

    /f;folgs k|b'if0fsf] b'O{ j6f gs/fTds c;/ n]Vg'xf];\ .

j)   What is goiter? unufF8 eg]sf] s] xf] <

k) What is chromosomal disorder?qmf]df]hf]dn l8::c8{/ eg]sf] s] xf] <

l)   What type of asexual reproduction takes place in hydra and tapeworm?xfO8«f / 6]kjd{df s:tf] s:tf] k|sf/sf] cd}y'lgsk|hgg\ x'G5 <

m) Write the functions of pericardial fluid.

    k]l/sfl8{on ˆn'8sf] sfo{ n]Vg'xf];\ .

n) What is mutation?Do'6];g eg]sf] s] xf]<

o) What is ozone depletion? cf]hf]g Iflos/0f eg]sf] s] xf] <

 

Group "B"    13×2=26

2. Government of Nepal gives the subsidy in solar equipments. Why?g]kfn ;/sf/n] ;f}o{ phf{sf] pks/0fdf ;x'lnotlbPsf] 5 . lsg<

3. An egg sinks in pure water but floats in saturated solution of salt. Why?z'b\b kfgLdf cG8f 8'Ag] / g'gkfgLsf] ;Gq[Kt 3f]ndf cG8f plqg'sf] sf/0f pNn]v ug'{xf];\ .

4. Study the given transformer and answer the following questions.lrqdf b]vfOPsf] 6«fG;kmd{/sf] cWoogug'{xf];\ / tn ;f]lwPsfk|Zgx?sf] hjfkmlbg'xf];\ .

a. What type of transformer is it? Why?of] s:tf] k|sf/sf] 6«fG;kmd{/ xf] <lsg<

b.  Calculate the number of secondary coil.6fG;kmd{/sf] ;]s]G8/L kmGsfsf] ;ª\VofkTtfnufpg'xf];\ .

5. 10 bulbs of 40 watt each and 2 heaters of 1200 watt each are used for two hours daily. Find the units of electricity consumed in 30 days.^) jf6sf !)cf]6faNa / !@)) jf6sf @ cf]6f lx6/x? k|To]slbg @ 3G6fsf b/n] k|of]u ul/Psf] 5 . #) lbgdfvktx'g] o'lg6 kTtfnufpg'xf];\ .

6. Give the electronic configuration of magnesium in terms of sub shell. Write its block and period on the basis of your electronic configuration.;a;]nsf] cfwf/dfDofUg]l;odsf] On]S6f«]g laGof; ug'{xf];\ .  o;sf] cfwf/dfDofUg]l;odsf] Ans / lkl/o8 kQfnufpg'xf];\ .

7. Define homologous series. Write the homologous series of alkanes.  xf]df]nf]u; l;l/hsf] kl/efiff n]Vg'xf];\ . cNs]gsf] xf]df]nf]u; l;l/h n]Vg'xf];\ .

8. Write any two differences between thermo-plastic and thermo-setting plastics.ydf]{–Knfl:6s / ydf]{;]l6ª Knfl:6s larsf] s'g} @ j6f km/s n]Vg'xf];\ .

9. Why is catalyst used in chemical reaction? Write two examples of catalyst./f;folgs k|ltls|ofdfpTk]|/ssf] k|of]u lsgul/G5 <pTk]|/ssf] @ j6f pbfx/0fx? n]Vg'xf];\ .

10. Why hormones are called chemical messengers? Write the name of hormones secreted by adrenal gland. xdf]{gnfO{ /f;folgs ;+jfbbftfklg elgG5, lsg< Pl8«gn u|lGyn] pTkfbgug]{ xdf]{gsf] gfd n]Vg'xf];\ .

11. Write two differences between layering and grafting.

    n]ol/ª / u|flˆ6ª ljlwaLr @ j6f km/s n]Vg'xf];\ .

12. Write one-one function of queen bee and worker bee.

    efn] df}/L / sdL{df}/Lsf] !÷! j6fsfo{ n]Vg'xf];\ .

13. The normal blood pressure of human being is 120/80 mm of Hg. What does it mean?Pp6f ;fwf/0f dflg;sf] An8 k]|;/ !@)÷*)mm of HgeGgfn] s] a'lemG5 <

14. Write any four objectives of launching of artificial satellites into the space.cGtl/Ifdfs[lqdpku|xx? k7fpg'sf] s'g} $ j6f p2]Zox? pNn]v ug'{xf];\ .

 

Group "C"6×3=18

15. The mass of the Jupiter is 2×10²⁷kg and its radius is 6.5×10⁴km. What is the acceleration due to gravity on the Jupiter? Also, calculate the weight ofa person having the mass of 70kg on the Jupiter.olb j[x:kltsf] lk08 2×10⁷kg/ cw{Jof;6.5×10⁴km5g\ eg] j[x:kltsf] u'?Tjk|j]u slt x'G5 <70 kg lk08 ePsf] dflg;sf] tf}n To; u|xdfkTtfnufpg'xf];\ .

16. Answer the following questions on the basis of given table.

    tn lbOPsf] tflnsfcg';f/ ;f]lwPsfk|Zgx?sf] pTt/ n]Vg'xf];\ .

Substances	Sp. heat capacity
A	2100 J/kg/0C
B	910 J/kg/0C
C	138kg/0C

i)   If A, B and C are taken in equal mass and heated by giving equal heat, which one of them gains the maximum temperature and why? olb ;dfg lk08 ePsfA, B / CnfO{ ;dfgtfklbFbfs'gkbfy{n] a9L tfkqmdk|fKt u5{ / lsg<

ii)  Which one of them is suitable for cooling and heating purpose? Why?oLkbfy{x?dWo], s'gkbfy{ lr:ofpg / ttfpgpko'St x'G5 <lsg<

iii)           If equal mass of A and B are taken at 80⁰C and left to cool, which will be cooled faster and why?olb a/fa/ lk08 ePsf] A/ BnfO{ 80⁰ C ;DdttfP/ lr:ofpbf, s'gkbfy{ rfF8} lrl:;G5 / lsg<

17. Write any two ores of Iron. The external cover of aeroplane is made from aluminium instead of iron. Give two reasons.

kmnfdsf] @ cf]6fwfpx?sf] gfd n]Vg'xf];\ . xjfOhxfhsf] aflx/L cfj/0f kmnfdsf] ;6\6f PNd'lgodaf6 agfOPsf] x'G5 . @ cf]6fsf/0f n]Vg'xf];\ .

18. Why magnesium hydroxide and aluminium hydroxide are called antacids? Write the balanced chemical equation for the formation of acidic salt by the reaction between strong acid and weak base.DofUg]l;od xfO8f]cS;fO8 / PNd'lgod xfO8f]cS;fO8nfO{ PG6fl;8 elgG5 . lsg< s8f cDn / g/d Iff/sf] k|lts[ofaf6 aGg] cDnLo n+j0fsf] pbfx/0f ;Gt'lnt /f;folgs ;lds/0f¢f/f n]Vg'xf];\ .

19. What is vegetative propagation? Give any two points to show the importances of vegetative propagation.s[ltd k|hgg\ eg]sf] s] xf] < s[ltd k|hggsf] @ cf]6f dxTTjpNn]v ug'{xf];\ .

20. Explain the present scenario of air pollution in Kathmandu valley. Write any two control measures of air pollution.sf7df8f}F pkTosfdfxfnsf] jfo' k|b"if0fsf] cj:yfsf] af/]df j0f{g ug'{xf];\ . jfo' k|b"if0f lgoGq0f ug]{ @ cf]6f pkfox? n]Vg'xf];\ .

 

Group "D"    4×4=16

21. A convex lens has a focal length of 3cm. If a pencil is placed twice of its focal length then, Pp6f sGe]S; n]G;sf] s]Gb|Ls/0f b'/L 3cm 5 . olb s]Gb|Ls/0f b'/Lsf] bf]Aa/ b'/Ldf Pp6f k]lG;n /flvPsf] 5 eg]M

i)   Draw a clear ray diagram to show the formation of image of pencil.ls/0f /]vflrqlvr]/ k]lG;nsf] cfs[lt b]vfpg'xf];\ .

ii) Write the nature of image.        cfs[ltsf] k|s[lt n]Vg'xf];\ .

iii) Calculate the magnification of image.

    cfs[ltsf] la:t[tLs/0f kTtfnufpg'xf];\ .

iv) What is the power of lens?       n]G;sf] ;fdYo{ slt 5 <

22.Draw a neat and labeled diagram showing laboratory preparation of gas which is found in deep well and is acidic in nature. Also write the balanced chemical equation of chemical reaction of that gas formed. What happens when this gas is passed through slaked lime for a while?k|of]uzfnfdfulx/f] O{gf/df kfO{g] clDno u'0f ePsf] UofF; agfpg] ljlwsf] ;kmfgfdª\lstlrqsf]g'{xf];\ . pStUofF; aGbfx'g] /f;folgsk|lts[ofsf] ;Gt'lnt ;lds/0f klg n]Vg'xf];\ . pStUofF;nfO{ s]xL a]/;Ddr'gkfgLdf k7fpFbf s] x'G5 <

23.If the monohybrid cross between black male rabbit and white female rabbit takes place, all offspring of F₁ generation were black. Why were not white offspring seen in F₁ generation? Show this process with the help of chart up to F₂generation. Also write genotypic and phenotypic ratio of black and white rabbit in the second filial generation. sfnf] efn] v/fof] / ;]tf] kf]yL v/fof]sf] lardfdgf]xfOla|8 s|; u/fpFbfklxnf] j+zdfsfnf v/fof]x? dfq b]lvPeg] ;]tf v/fof] b]vf k/]gg\ lsg< bf];|f] j+z;Ddsf] rf6{ agfO{ k|i6 kfg'{xf];\ . pStj+zsf] lhgf]6fOk / lkmgf]6fOk cg'kftklgpNn]v ug'{xf];\ .

24.What is the time period of Mesozoic and Cenozoic Eras? Write the chief animals developed in those eras.  Write any two importance of fossils.d];f]hf]Os / ;]gf]hf]Os O/fsf] cjlwsltxf] <pSt O/fdfljsl;td'Vohgfj/x?sf] gfd n]Vg'xf];\ . hLjfjz]ifsf] @ cf]6f dxTjpNn]v ug'{xf];\ .

 

—

Sample Project Report

A PROJECT REPORT ON STUDY BOILING POINT OF WATER

 

 

 

 

 

By:

Abc Efg

Grade:………Section:

Roll No:……..

 

Submitted to:

[Teacher’s Name]

Department of Science

…………………………. School

…………………………

2021

Introduction:

Kinetic theory states that all molecules in matter are in constant motion (Kane and Sternheim, 1984). As these molecules absorb more energy they have a higher amount of random movement. As energy is absorbed in the form of heat the average kinetic energy (temperature) of the molecules will increase except during a phase change. The absorbed energy used in the phase change breaks the attractive forces between the molecules, thus transformation occurs in the orientation of the molecules. An example of a phase change would be the boiling point of water which is a change from a liquid to a gas. This can be observed by using a temperature versus time line graph when the slope becomes zero (plateau) The boiling point of water is expected to be 100.00 _oC (Merck, 1976).

 

Objective:

The purpose of this experiment is to determine the boiling point of water.

 

Hypothesis:

If the pressure in the classroom is close to 1 atmosphere, then the boiling point of water should be approximately 100 degrees Celsius.

 

Materials List:

500 ml beaker distilled water, thermometer, hot plate,

Word Processing Software

 

Procedure:

The required materials were selected and taken to the workstation. The beaker was filled with approximately 300 ml of distilled water. The beaker was gently placed on the hotplate.

The thermometer was placed in the beaker and the initial temperature was recorded. The hotplate was switched on to high.

The temperature was recorded every 2 minutes until 6 minutes after boiling began.

The hotplate was turned off and the materials were allowed to cool for at least 10 minutes before the equipment was dismantled.

 

Figure 1. The equipment for this experiment was set up as shown in this figure.

Data / Results / Observations:

Quantitative Results

Table 1 Graph displaying data obtained from the heating of water from 0 to 16 minutes

Figure 2. A line graph of temperature versus time of the data obtained in Table 1

Qualitative Results

Numerous small bubbles formed at the bottom of the beaker at 70.6 _oC. The size and rate of bubble formation increased as the temperature increased. At 100.0 _oC the rate and size of bubble formation remained constant. At that temperature, there was constant production of steam.

 

Calcuations / Analysis:

 

Conclusion:

It was determined from the data plotted in the temperature versus time graph (Figure 2) that the boiling point of water is 99.51 oC. This concurs very closely with the stated hypothesis, therefore the experiment was deemed a success. The percent error was found to be 0.49%. Possible sources of error could have involved impurities in the water and human error in reading the thermometer. Possible sources of error may be impurities in the water which may be chemicals from dirty glassware. Improvements would include more accurate thermometers, clean equipment and proper reading of the thermometer.

 

 

References:

Kane, Joseph W. and Morton M. Sternheim. Physics. New York: John Wiley & Sons, 1984 ed.

Merck, Josef. Merck Index of Chemical Constants. New York: Benjamin/Cummings Publishing Company Inc. 1976.

Biology Project Work

 List of Biology Project Works:

1.       Collect the sample of cryptogams (Algae, Bryophytes, Pteridophytes) and study their

characteristics.

1.       Observe and compare the morphological adaptation of hydrophytes, xerophytes and

xerophytes.

2.       Prepare a report on local varieties and improved varieties of crops and vegetables in your

area.

3.       Visit the forest or vegetation types in your nearby area and prepare a report on it.

4.       Prepare a report on the role of botanical garden in conservation of plants in Nepal

5.       Survey any locality regarding any topics related to theory course of Biology (visit to

zoological museum/zoo/protected areas/natural habits- forest/lake or river) and writing a

report of it

6.       Prepare a report on causes and consequences of environmental pollution in your locality.

7.       Observe different cultivation methods of Mushroom and prepare a report on it.

8.       Look for resources like library, journals, web surfing, field observations etc and study

present status and scope of Biotechnology in Nepal.

9.        Prepare a report on the topic "significances of the biology and biology education with

different sectors i.e. industrial development, medicine, bio-technology, agriculture etc".

10.   Prepare a report on "recent development of genetic field and their implications in human

life"

11.   Prepare model of DNA and RNA

12.   Visit the human beings and observe the dominant and recessive characteristics of human

beings and prepare a report on it

13.   Measure the blood pressure (BP) of human bodies and predict the trends of age wise BP.

14.   Visit the poultry farming or fish farming in local area and prepare a report by including

the place, farming method, marketing etc.

15.   Conduct the survey on common communicable diseases prevailing in local area. Prepare

a report by including the disease, causes, preventing measures.

16.   Prepare a report on trends, causes and consequences of migration in local level.

17.   Prepare functional models of different system of human body.