KCBE Science Past Paper 2022 PDF

Total Candidate Code No. Marks 110 KIRIBATI CERTIFICATE IN BASIC EDUCATION 2022...

Total Candidate Code No. Marks 110 KIRIBATI CERTIFICATE IN BASIC EDUCATION 2022 SCIENCE QUESTION and ANSWER BOOKLET Instructions:  Write your candidate code in the box provided above, at the back and on every page of this exam booklet.  Answer all questions in the space provided in this exam booklet  Ask the supervisor if you need extra paper and make sure to write your candidate code in the extra paper you use.  Make sure that this question booklet pages are from 1 – 23. Page 23 is deliberately left blank for use. Time allowed: 2 hours (plus 10 minutes reading time) Section Major Learning Outcome Weighting/ Marker Marks Only 1 Strand 1 :- The Human Biology Students are able to demonstrate an understanding of the structure and 24 function of the human body 2 Strand 4:- Elements and Compounds Students are able to demonstrate an understanding of the components 24 of compounds and their importance in everyday life 3 Strand 6 :- Environment and Pollution Students are able to demonstrate an understanding of the importance of 14 a clean environment and the effects of pollution 4 Strand 7 : - Electricity Students are able to demonstrate an understanding of electricity, its 24 role and importance to society and the country 5 Strand 8:- Force and Motion Students are able to demonstrate an understanding of force and motion 24 and their applications TOTAL 110 HAND THIS BOOKLET TO THE SUPERVISOR 0 SECTION 1: STRAND 1 - THE HUMAN BIOLOGY (24 marks) MLO: Students are able to demonstrate an understanding of the structure and function of the human body PART A) MULTIPLE CHOICE QUESTIONS Circle the best answer. 1 Cells are best defined as a. a group of living organisms b. a smallest unit of living organism Unistructural c. a smallest unit in a non-living thing 1 0 NR d. a group of non-living organism. 2. A cell process whereby energy obtained by organism is known as a. photosynthesis b. osmosis Unistructural c. respiration 1 0 NR d. growth 3 The composition of the blood responsible for the blood clotting is a. Platelets b. White blood cell Unistructural 1 0 NR c. Red blood cell d. Liquid part. 4 A network of small thin blood vessels that connect artery and vein is a. Brain b. Heart Unistructural 1 0 NR c. Lung d. Capillary /4 1 Candidate’s Code PART B) LABELING 1. Study the diagram shown below Name the part labelled W,X, Y and Z W_________________________ X_________________________ Y_________________________ Z________________________ Unistructural 4 0 NR /4 2 Candidate’s Code PART C). SHORT ANSWER Answer all Questions Given below are the common types of cells found in animals 1 “ skin cell, blood cell, muscle cell, and nerve cell” Choose only 2 groups and describe their important role in animals. Multistructural ________________________________________________________________________ ________________________________________________________________________ 2 ________________________________________________________________________ 1 ________________________________________________________________________ 0 ________________________________________________________________________ ________________________________________________________________________ N R 2 Name one sensory organ in humans and describe its important role. Name: -___________________________ Multistructural Role___________________________________________________________ 2 _______________________________________________________________ 1 _______________________________________________________________ _______________________________________________________________ 0 _______________________________________________________________ N _______________________________________________________________ R 3 Coronary heart disease and stroke are the common heart disease in human. Describe the main causes of those two heart diseases. _______________________________________________________________ Multistructural _______________________________________________________________ _______________________________________________________________ 2 _______________________________________________________________ 1 _______________________________________________________________ 0 _______________________________________________________________ NR _______________________________________________________________ /6 3 Candidate’s Code PART D): LONG ANSWER Answer ALL questions in the space provided. 1 Carbon monoxide, Tar and Nicotine are the three harmful chemicals in cigarette smoking. Explain how those three factors above affect human health. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ Relational ______________________________________________________________ 3 ______________________________________________________________ 2 1 ______________________________________________________________ 0 ______________________________________________________________ N ______________________________________________________________ R 2 Sperm and egg cells are the two important human sex cells in reproduction. Draw only one human sex cell and label only two parts. Relational 3 2 1 0 NR /6 4 Candidate’s Code  3 Discuss the important role of senses in human and support by stating 3 examples. _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ Extended _________________________________________________________________ Abstract 4 _________________________________________________________________ 3 _________________________________________________________________ 2 _________________________________________________________________ 1 _________________________________________________________________ 0 _________________________________________________________________ NR _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ /4 SECTION 1 TOTAL /24 SECTION 2: STRAND 4 – ELEMENTS AND COMPOUNDS (24 Marks) MLO: Students are able to demonstrate an understanding of the components of compounds and their importance in everyday life PART A) MULTIPLE CHOICE QUESTIONS Circle the best answer. 1 The difference between ions and atoms is a. Ion is a charged objects only b. Atoms is a charge object only Unistructural 1 0 NR c. Ions have no charge d. they have both no charge 5 Candidate’s Code  2. The correct symbol of Calcium when it becomes an ion is a. C4- b. Ca Unistructural c. C 1 0 NR d. Ca2+ 3 The important source of Phosphorus metal is a. Gravel beach b. Limestone rock c. Calcium metal Unistructural 1 0 NR d. Phosphate rock 4 The strongest metal commonly used in the construction of frames in bridges, houses and ships is a. Copper b. Aluminum Unistructural c. Lead 1 0 NR d. Iron /4 PART B) Filing the gap. Use word from the list given to fill in the gap shown Word List Atoms , Crude oil , Gasoline , mining , Alloys , calcium , aluminium , Ions. 1 ___________________________ is an example of important product from fractional Unistructural 1 0 NR distillation of crude oil. ________________ is a liquid part found underground formed by fossilized plants 2 Unistructural and animal matter exist millions of year ago. 1 0 NR 3 _____________________ is defined as the smallest unit of matter. Unistructural 1 0 NR 4 Limestone is an important source of _____________________ metals. Unistructural 1 0 NR 6 Candidate’s Code  5 ____________________ are made by combining two or more metallic elements, Unistructural 1 0 NR 6 The important first step in extracting metals such as gold and iron is Unistructural 1 0 NR __________________. /6 PART C ). SHORT ANSWER Answer all Questions in the space provided. 1 Name one compound in the Science laboratory you know and state its formula Multistructural 2 1 ___________________________________________________________ 0 N R 2. Describe two important physical properties of nonmetals. Multistructural _______________________________________________________________ 2 _______________________________________________________________ 1 _______________________________________________________________ _______________________________________________________________ 0 N R 3 Describe fractional distillation and state one important use nowadays. Multistructural ______________________________________________________________ 2 ______________________________________________________________ 1 ______________________________________________________________ ______________________________________________________________ 0 N R 4 Name one example of metal alloy and state its important use. Multistructural ______________________________________________________________ 2 ______________________________________________________________ 1 ______________________________________________________________ ______________________________________________________________ 0 N R 7 Candidate’s Code /8 PART D : LONG ANSWERS Answer ALL questions in the space provided. 1 The diagram below is a summary of a Nitrogen cycle Relational 3 2 1 0 N R https://www /the nitrogen cycle article/Ecology/ Khan Academy What is Nitrogen cycle and explain 2 importance to the surrounding. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ _____________________________________________________________ /3 8 Candidate’s Code 2 Some important processes involved in the treatment of metals are “ recycling , galvanizing , painting and oiling”. Choose only 3 processes above and explain its important application. _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ Relational _________________________________________________________________ 3 _________________________________________________________________ 2 _________________________________________________________________ 1 _________________________________________________________________ 0 NR /3 SECTION 2 TOTAL /24 9 Candidate’s Code SECTION 3: STRAND 6- ENVIRONMENT AND POLLUTION (14 marks) MLO: Students are able to demonstrate an understanding of the importance of a clean environment and the effects of pollution PART A) MULTIPLE CHOICE QUESTION Circle your best answer very clearly. 1 Wetland ecosystem best described as a. a variety of plant and animal life in the world or in a particular habitat. Unistructural b. an area which includes ponds and muddy both in the lagoon and on the land. 1 0 NR c. an ecosystem found along coastal area of the tropical islands a home of million small fishes. d. an area of large open ocean water with a large number of marine life. 2 Provided below are the major danger to environment except a. Climate change. b. Waste pollution. c. Causeway development Unistructural d. Planting coconut tree 1 0 NR 3 The main cause of nuclear pollution in the Pacific is a. dumping large number of leaves in the ocean b. dumping large number of plastics bag in the ocean. c. dumping large number of weapons in the ocean Unistructural d. dumping large number of dead plants in the ocean. 1 0 NR 4 The best way to minimize pollution to the environment is by a. burning a large number of plastics. b. burning a large number of leaves. c. Reducing the number of cars imported to the pacific Unistructural d. Increasing the number of cars imported to the pacific 1 0 NR /4 10 Candidate’s Code PART B : - DEFINITION. Write the definition of the three terms given Terms 1. Pollution, 2. Environment 3. Biodiversity 1 Unistructural 1 0 NR 2 Unistructural 1 0 NR 3 Unistructural 1 0 NR PART C:- SHORT ANSWER Answer all questions in the space provided. 1 Describe 2 effects of air pollution from burning plastics to the environment. Multistructural _________________________________________________________________ 2 _________________________________________________________________ _________________________________________________________________ 1 _________________________________________________________________ 0 _________________________________________________________________ N _________________________________________________________________ R _________________________________________________________________ 2 Describe 2 ways to minimize pollution from using cars in Kiribati. Multistructural _________________________________________________________________ 2 _________________________________________________________________ _________________________________________________________________ 1 _________________________________________________________________ 0 _________________________________________________________________ N _________________________________________________________________ R /7 11 Candidate’s Code PART D : LONG ANSWERS Answer ALL questions in the space provided. 1 Explain 3 main effect of causeway construction experienced in most Pacific Islands. ______________________________________________________________ Relational 3 ______________________________________________________________ 2 ______________________________________________________________ 1 ______________________________________________________________ 0 ______________________________________________________________ N ______________________________________________________________ R ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ _____________________________________________________________ /3 SECTION 3 TOTAL /14 12 Candidate’s Code SECTION 4 : - ELECTRICITY (24 Marks) MLO: Students are able to demonstrate an understanding of electricity its role and importance to society and the country PART A) Multiple Choice Questions Circle clearly your best answer. 1 Increasing the voltage across any conductor will a. decrease the current flow to a conductor b. increase the current flow to a conductor Unistructural c. cause the current to flow in the opposite direction 1 0 NR d. cause the current to flow in one direction. 2 Electrical energy best defined as a a. form of energy flow in wires. b. form of energy flow in pipes. Unistructural c. form of energy flow in the air. 1 0 NR d. form of energy flow in water. 3. Common example of electrical appliances used at homes is a a. bicycle Unistructural b. wheelbarrows 1 0 NR c. TV screen d. shovel 4 Cost of using electricity decreases when a. turning your light on for over a long period of time Unistructural b. turning your light on for a short period of time 1 0 NR c. turning on large devices for the whole day. d. turning on many light sources overnight. /4 13 Candidate’s Code PART B). MATCHING Match the term in list A with the correct description or examples in list B by writing the LETTER from the list in B in the answer spaces provided List B Answer List A 1 Current A. is the electric force that causes electric Unistructural 1. _____ 1 0 NR charge to flow 2 Ammeter B. describe the relationship between voltage, Unistructural 2. ______ 1 0 NR current and resistance 3 Voltage C. is a flow of electric charge in a current Unistructural 3. ______ 1 0 NR 4 Voltmeter D. is used to measure voltage across a Unistructural 4. ______ 1 0 NR component 5 Ohm’s law E. an electric device used to measure current. Unistructural 5. ______ 1 0 NR F. is a type of connection used in an electric circuit /5 14 Candidate’s Code PART C). SHORT ANSWER Answer all Questions in the space provided for each question. 1 Describe the term “Resistance’’ and state its important unit. ________________________________________________________________________ Multistructural ________________________________________________________________________ 2 ________________________________________________________________________ ________________________________________________________________________ 1 0 NR The voltage across a resistor is 240V. If the current flow through that resistor is 0.5A, 2 calculate the resistance of the Resistor using Ohm’s law V = IR. (Show your working out) Multistructural 2 1 0 NR Given below are the two electrical appliances commonly used in the office. 3 Multistructural 2 Which appliance will use more electrical energy and state why? 1 ________________________________________________________________________ 0 ________________________________________________________________________ N ________________________________________________________________________ R ________________________________________________________________________ 15 Candidate’s Code  4 A 25W Printer is used at Takoronga JSS to run exam papers. Calculate the energy (in kWHr) consumed by this device in 4 hours. [ Hint :- E = Pt , show your working out] Multistructural 2 1 0 N R /8 PART D): LONG ANSWER Answer ALL questions in the space provided. 1 Draw a series circuit diagram showing a battery, a resistor and a switch Relational 3 2 1 0 NR 2 A family on South Tarawa plan on their weekly budget using electricity to provide light outside their house. They need 2 lamps (of each 0.1kW power rating) to run 12 hours every night. Determine the cost they will pay every week (7days), using PUB domestic tariff rate of $0.10 / kWHr. [ Hint – determine the total energy consumed first then the total cost] _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ Extended 16 Candidate’s Code  _________________________________________________________________ Abstract _________________________________________________________________ 4 _________________________________________________________________ 3 2 _________________________________________________________________ 1 _________________________________________________________________ 0 NR /7 SECTION 4 TOTAL /24 SECTION 5: STRAND 8 – FORCE AND MOTION (24 marks) MLO: Students are able to demonstrate an understanding of force and motion and their applications PART A) MULTIPLE CHOICE QUESTIONS Circle the best answer. 1 Increasing the force on a pivot will cause a Moment of force to Unistructural a. remain constant 1 0 NR b. decrease c. reverse d. increase 17 Candidate’s Code 2 Two same object at rest placed on two different tracks as shown The best comparison of the object’s motion in two different plane , if the same force F applied is Level plane Slope plane a Accelerate and then slow down Increase its speed as it roll down the slope Unistructural b Accelerate and then slow down Decrease its speed as it roll down the slope 1 0 NR c Slow down and then accelerate Increase its speed as it roll down the slope d Slow down and then accelerate Decrease its speed as it roll down the slope 3 Acceleration best defined as a. a stationary object on the street. b. a motion without a change in speed. Unistructural c. a decrease in an object speed. 1 0 NR d. an increase in an object speed. 4 An object undergone a change in speed of 5m/s in 0.1s. The acceleration of an object is a. 5m/s2 b. 50m/s2 Unistructural c. 500m/s2 1 0 NR d. 0.1m/s2 18 Candidate’s Code PART B. TRUE AND FALSE Write T alongside the true statement and F alongside the false statement in the space provided Statements Answer (T / F) 1. A lever is a simple machine used to move large load using a pivot Unistructural 1 0 NR 2. Moment of force depends on the force and the distance from the Unistructural pivot of a lever. 1 0 NR 3. Speed best defined as how far an object move to reach its target. Unistructural 1 0 NR 4. Increasing the force on an object will cause an object’s Unistructural acceleration to decrease 1 0 NR 5. A horizontal line on a distance time graph shows that an object Unistructural is not moving. 1 0 NR /5 PART C) SHORT ANSWER Answer all Questions in the space provided. 1. An object of mass 2 kg travel at an average distance of 90meters in 1 minutes. Multistructural Determine the speed of an object in m/s. 2 1 0 NR 19 Candidate’s Code 2 Complete the graph given below to describe the motion below. “A car moves at a constant speed to reach a distance of 4m in 4minutes, and then stopped for another 4 minutes.” 5 Distance time graph 4 3 Distance (m) Multistructural 2 2 1 1 0 0 1 2 3 4 5 6 7 8 9 10 0 Time (mins) NR 3 A school bus travel at 10m/s when passing a police station and then increase its speed to 20m/s in 40s. Determine the acceleration of the school bus. Multistructural 2 1 0 NR Answer :- _____________________ 4 A 50N force applied on a rock 5m from the turning point in a lever system. Multistructural Calculate the turning effect of the lever system [Hint: M = Fd] 2 1 0 NR Answer :- _____________________ 20 Candidate’s Code PART D): LONG ANSWER Answer ALL questions 1 State the formula represented by Newton’s second law, and use it to calculate the Force applied on a 400gram soccer ball as shown below. A = 2.5m/s2 Relational 3 2 1 0 NR /3 21 Candidate’s Code 2 A 1m ruler easily rotated around cone X, acting as a lever system shown in the diagram below Unistructural 1 0 NR i. Name the part of a lever system labelled X. ______________________ ii. If 5 books (80N weight) placed on a ruler was balanced on a horizontal position by another single book (22.5N weight) on the other side, calculate the distance y. [Hint: M = f x d and Show you working out] Relational 3 2 1 0 NR SECTION 5 /4 TOTAL / 24 END OF EXAMINATION 22 Candidate’s Code  This page is deliberately left blank. 23 Candidate’s Code