Biology
Kemia
Fisiks
Chografi
Language
100

1. Name the characteristic of living organisms illustrated by each of the activities described below: (a) Dressing heavily 

(b) Bursting of the sporangium in the Rhizopus 

(a) Dressing heavily 

  • Irritability/sensitivity/Response to a stimulus/stimuli

    (b) Bursting of the sporangium in the Rhizopus sp 


  • Reproduction
100

 Ethene is prepared in the laboratory by dehydration of ethanol.

(a) Name a suitable dehydrating agent used in this process. 

Concentrated sulphuric(VI) acid Al203 H3PO4

100

State two ways of reducing surface tension of a liquid.

  • Using detergents/impurities
  • Raising the temperature
100

What is Geography

Geography refers to the study of the distribution of natural and human features/phenomenon and their interrelationship on the earth surface

100

Kola has a special liking............Mathematics.

For

200

(a) Explain why plants have lower respiratory rates compared to animals.

Plants are less active than animals, hence require lower amount of energy than animals.

200

State Graham’s law of diffusion.

The rate of diffiision of a gas is inversely proportional to the square root of its denslty at constant temperature and pressure.

200

For a fluid flowing at a velocity V in a tube of cross-sectional area A, VA =fluid rate. State 3 assumptions made in deriving this equation.

i) Flowing steadily

(ii) Incompressible

(iii) Non-viscous

200

List three types of soil erosion 

  • Splash erosion Gulley erosion
  • Sheet erosion
  • Rill erosion
200

Nomino zifuatazo zimo katika ngeli gani?

a) Uzi____________________________

b) Muda__________________________

U-ZI

U-U

300

3. During a practical investigation on food tests, students were provided with the following reagents.

Benedict's solution

Sodium hydrogen carbonate

''' Dilute hydrochloric acid.

(a) Identify the food substance the students were to test. 

Non reducing sugar

300

a) What would be observed if sulphur (IV) oxide is bubbled through acidified potassium manganate (VII)?

The acidified permanganete will be decolourised (purple to colourless) b) The permanganate (Vll) is reduced to manganese (II) ion.

300

State the meaning of the term “radian” as a unit of measurement.

Radian is an angle subtended at the center of a circle by an arc of length equal to the radius of the circle.

OR

r = 360/2π

300

Give three factors that influence the way a river transports its load

  • The volume of water.
  • The gradient of the slope.
  • The nature of the load.
  • The velocity of the river.
  • The amount of the load
300

Kwa kweli ni hali ngumu hii”

  1. Weka dondoo katika muktadha wake.
  • Mzungumzaji ni Ridhaa
  • Anayezungumziwa  ni Kaizari
  • Ni katika kambi/mabanda- Kwenye Msitu  wa Mamba
  • Ni baada ya Kaizari kumsimulia Ridhaa magumu aliyoyapitia kutoka  kwake nyumbani hadi kujipata kweye hali nyingine ngumu katika kambi.
400

State the importance of a well-developed blood capillary network in the alveoli.

Increases the surface area for (efficient) exchange/transport of respiratory gases (oxygen and carbon (IV) oxide)

400

State and explain how each of the following affects the yield of ammonia:

i. Increase in temperature. 

ii. Finely divided iron.

  • i. Increase in temperature. 


  • i. It lowers the yield of ammonia since the forward reaction is exothermic or backward reaction is endothermic

  • ii. Finely divided iron. 

    ii. No effect

  • A catalyst has no effect on the position of the equilibrium
400

The diameter of a wire was measured as 2.43 mm. Name the instrument that was used to measure this diameter

Micrometer screw gauge.

400

Apart from inter tropical convergence zone (ITCZ), list four physical factors that influence climate.

  • Latitude
  • Altitude
  • Distance from the sea/continenta1ity
  • Aspect
  • Ocean currents
  • Winds/air masses
  • Configuration/alignment of the coastline
400

Uliona nini kwa huyo zebe wako? Eti mapenzi!

  • Maneno ya Majoka
  • Anamwambia Ashua
  • Ofisini mwa Majoka
  • Ni baada ya Ashua kumkataa Majoka Kimapenzi alipokwenda kutaka msaada kwake
500

Give a reason why it is not advisable to use water in cleaning a microscope.

To avoid rusting To avoid interference with visibility of the lens.

500

A small piece of sodium metal was placed in a beaker containing pure water revision.

a. State two observations made during the reaction. 

b. State and explain another observation made when a drop of phenolphthalein is added to the mixture in the beaker. 

  • a. State two observations made during the reaction. 


  • The piece of metal darts/floats
  • Melts into silvery ball
  • Production of effervescence/hissing sound
  • The beaker becomes warm

    b. State and explain another observation made when a drop of phenolphthalein is added to the mixture in the beaker. 

500

Name the three components of the electron gun in a cathode ray tube

The heating coil/ cathode

Grid

The anodes

500

Describe the tundra climate. 3 xtics

  • It is found above 66½° north/artic circle and above 66½° south of the equator/Antarctic circle.
  • It has cold winters /with temperatures varying between. —29°C to - 40°C .
  • It has very long winters/ lasting 8 months.
  • It has cool summers/ with temperatures of about 10°C - 15°C. It has short summers lasting 3 months.
  • It has a very large annual range/ of temperature going up to 73°C.
  • There is permanent cover of snow and ice/permafrost.
  • The area is generally dry/ with low annual precipitation/ of 100 — 250mm.
  • During the long cold winters, polar winds are dominant.
  • Snow storms/blizzards are common in this region.
  • High pressure zone
  • Low humidity
500

Nipe chai, andazi mbili na egg moja………….

Taja sajili

a) Hotelini/mkahawani

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