https://validator.w3.org/feed/docs/rss2.html Home Page 2021 <strong>The diagram below shows a set-up used to investigate one of the factors<br>affecting rusting .Test -tubes W,X,Y and Z are filled with equal amounts of <br>different gases as shown in the diagram .Use it to answer question 39.</strong><br>Which test-tube would have the <strong>highest</strong>water level after one month? The diagram below shows a set-up of an experiment which was used to investigate<br> diffusion in gases .Nitrogen dioxide is dark brown in colour .<br>The glass plate is removed.<br>Which of the following correctly describe the colour of gas inside the gas jars after<br>the set-up was left for 12hours? The table below shows boiling points of substances <strong>P,Q,R and S.</strong>.<br>A mixture is composed of substances <strong>P,Q.R and S.</strong><br>The mixture is distilled.<br>Which substances would be collected at a temperature of 83C? Which process in the blast furnace removes silicon dioxide from iron ore? Which of the following elements is a non-metal? <strong>The diagram below shows the structure of an allotrope of carbon.<br>Use it to answer question 34.</strong><br>Which physical property does the allotrope have? The symbol of an atom of a certain element is 19/9 <strong>Y</strong>.<br>What is the arrangement of electrons in the atom? Water is warmed.<br>What happens to the molecules of the water? Drugs <br>W, X, Y</strong>and <strong>Z</strong> were administered to individuals to assist with constipation<br>problems. The results of how individuals responded are shown in the graph.<br>Which of the drugs is <strong>most</strong> likely to be recommended by doctors to patients with<br>constipation problems? Which of the following substance is a product after the action of salivary amylase<br>on the starch? Which of the following parts of the body produces bile? <strong>The diagram below show different joints L and M.<br>Use them to answer question 28.<br>Which row correctly matches joints <strong>L</strong>and <strong>M</strong> with joints found in the human body? Which of the activities is <strong>least</strong>likely to reduce heart disease? In which part of the human body is oxygen added into the blood? An organism produced many offsprings of which few survived.<br>Which graph best describes the reproductive cycle of the organism? The graph below shows the rate of photosynthesis in coexisting plants <strong>X,Y and Z</strong><br>in different light intensities.<br>Which statement is true about the graph? Which of the following statements is true about human reproduction? Which structure in the male reproductive system receives sperms from the sperm duct? <strong>Use the information given below to answer question 21.</strong><br>In a certain habitat, foxes feed on hares while mites feed on foxes. The<br>population of the mites increase in the habitat.<br>How will the population of the foxes and hares be affected? Which of the following pairs of items is needed for respiration? Which part of the plant is the main site for photosynthesis? <strong>Use the information and the diagram below to answer question 40.</strong><br>The set-ups X,Y and Z below were used to investigate the breakdown of hydrogen peroxide<br>to produce oxygen. In each set-up, 100g of raw potatoes of different sizes were reacted with 100ml of hydrogen peroxide. Between which two stages does the mixture exist in solid form only ? Which substance is formed from dissolved nitrates in the soil? <strong>The diagram below shows a circuit with a 20 heater which is operated from a 240V power supply. Use it to answer question 15.</strong><br>How much current will flow through the heater when the switch is closed? Which symbol represents an instrument for measuring potential difference? <strong>The diagram below shows an electric circuit .Use it to answer question13.</strong><br>What is the total resistance of the circuit? <strong>The diagrams below show a plotting compass placed next to a coil before and<br>after the switch is closed .Use them to answer question 12.<br>Which statement correctly explains the observation? Which of the following wave properties results in rainbow formation? Which of the following diagrams shows the correct movement of convection current in<br>water? <strong>The diagram below shows a sound wave moving through air in given <br>direction .Particle P is marked on the wave .Use it to answer question 9.</strong><br>How does particle <strong>P</strong>move as the wave passes through air? The list below consists of items in a household<br>(i)Food<br>(ii)Dry cell<br>(iii)Electric heater<br>(iv)Wood<br>Which of the items are sources of chemical energy? Which diagram does <strong>not</strong>show the correct path of a ray of light moving from one material to another? <strong>The graph below shows the change in temperature of a liquid mixture as it cools.br>Use it to answer question 39</strong> Which statement is<strong>not</strong>a necessary precaution when using electricity? The diagram below show sound waves <strong>1,2 and 3</strong><br>Which of the following is the correct decreasing order of loudness of the sound waves? Which pair of errors is found in measurement of time but <strong>not</strong>in measurement of length? <strong>The diagram below shows a measuring cylinder with water before and after<br> lowering a stone into it . Use them to answer question 3.</strong><br>What is the volume of stone? Seven identical metal spheres have a total mass of 36.4g.<br>What is the average mass of metal sphere? What is the SI unit of length? 2011 What is the correct order of the rate of breakdown in test-tubes<strong>X,Y and Z</strong>, starting with the<br>highest?<br>Highest rate………>Lowest rate What is the correct order of the rate of breakdown in test-tube <strong>X,Y and Z, starting with the highest? Which of the following is a possible effect of removing ovaries from a woman’s body? Which of the following is not a technology used in space exploration? What is the name of the part labelled <strong>Z?</strong> <strong> The diagram below shows a tissue in in a plant leaf.<br>Use it to answer question 37.</strong> The table below shows mass and volume for four different solids <strong>P,Q,R and S.(Density of water is 1.0g/cm3)<br>Which solid will sink in water?