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Study the flow chart below and answer the questions that follow.
(i) State the conditions for the reaction in Step I to occur.
(ii) Identify substance J.
(iii) State one disadvantage of the continued use of substance such as J.
Date posted:
June 7, 2017
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Give the factors that influence the occurrence of surface run-off.
Date posted:
June 7, 2017
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Ethanol obtained from glucose can be converted to ethene as shown below;
Name and describe the process that takes place in steps I and II.
Date posted:
June 7, 2017
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Give ways in which the information collected during the field study on types of mass wasting would be useful to the local community.
Date posted:
June 7, 2017
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Give the methods that you would use to collect data, when you are carrying out a field study on types of mass wasting.
Date posted:
June 7, 2017
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List the negative effects of mass wasting on the physical environment.
Date posted:
June 7, 2017
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Give the conditions that influence the process of solifluction in mass wasting.
Date posted:
June 7, 2017
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Describe carbonation in weathering process.
Date posted:
June 6, 2017
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List the factors influencing mass wasting.
Date posted:
June 6, 2017
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Explain the physical factors that enhance movement of materials along a slope due to gravity.
Date posted:
June 6, 2017
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Give the factors influencing the rate of weathering.
Date posted:
June 6, 2017
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Explain the effect of mass wasting on tourism.
Date posted:
June 6, 2017
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Give the physical conditions that may influence landslides.
Date posted:
June 6, 2017
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Give the factors that cause soil creep.
Date posted:
June 6, 2017
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Figure 4 shows the cross-section of a diffusion cloud chamber used to detect radiation from radioctive sources.
(i) State one function of each of the following:
Alcohol
Solid CO2
(ii) When radiation from the source enters the chamber, some white traces are observed. Explain how these traces are formed and state how the radiation is identified.
(iii) A leaf electroscope can also be used as a detector of radiation. State two advantages of the diffusion cloud chamber over the leaf electroscope as a detector.
Date posted:
June 6, 2017
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Describe how an exfoliation dome is formed.
Date posted:
June 6, 2017
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Figure 4 shows a Geiger Muller (G.M,) tube.
(i) Give the reason why the mica window is made thin
(ii) Explain how the radiation entering the tube through the window is detected by the tube.
(iii) What is the purpose of the halogen vapour?
Date posted:
June 6, 2017
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Describe the characteristics of the Savannah vegetation.
Date posted:
June 6, 2017
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List the characteristics of the Mediterranean type of vegetation.
Date posted:
June 6, 2017
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Give the effects of a warm ocean current on the adjacent Coastlands.
Date posted:
June 6, 2017
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Figure 8 shows ultra-violet light striking a polished zinc plate placed on a negatively charged gold-leaf electroscope.
Explain the following observations.
(i) The leaf of the electroscope falls.
(ii) When the same experiment was repeated with a positively charged electroscope the leaf did not fall
Date posted:
June 6, 2017
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Explain how altitude influences climate.
Date posted:
June 6, 2017
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Explain how the distance from the sea influences climate.
Date posted:
June 6, 2017
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Explain how land and sea breeze occurs.
Date posted:
June 6, 2017
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Figure 18 shows the parts of an x-ray tube.
(a) Explain why:
(i) A potential difference is applied to the filament.
(ii) A high potential difference is applied between a cathode and the anode.
(iii) Most of the tube is surrounded by lead.
(b) State how the resulting x -rays are affected by increasing the potential difference between the anode and the cathode.
Date posted:
June 6, 2017
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Figure 13 shows the features of an X-ray tube.
(i) Name the parts labeled A and B.
(ii) Explain how a change in the potential across PQ changes the intensity of the X -rays produced in the tube.
(iii) During the operation of the tube, the target becomes very hot. Explain how this heat is caused.
(iv) What property of lead makes it suitable for use as shielding material?
Date posted:
June 6, 2017
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Explain why you would need the map of the location.
Date posted:
June 6, 2017
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Figure 10 shows the main features of a cathode ray oscilloscope (CRO).
(i) Name the part labeled M and N.
(ii) Explain how electrons are produced in the tube.
(iii) State why the tube is highly evacuated.
Date posted:
June 6, 2017
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Give the characteristics of hot desert climate.
Date posted:
June 5, 2017
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Discuss the negative effects of earthquakes.
Date posted:
June 5, 2017