2023 LSS Sec 2 EXP EOY Section A, B & C

Anglo-Chinese School (Barker Road) END-OF-YEAR EXAMINATION 2023 SECONDARY TWO EXPRESS SCIENCE Total Duration for All Sections: 2 hours SECTION A INSTRUCTIONS TO CANDIDATES: The use of an approved scientific calculator is expected, where appropriate. Do not use glue or correction fluid. INFORMATION FOR CANDIDATES: There are four possible answers, A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate OTAS answer sheet. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 12 of this booklets. This question paper consists of 12 printed pages

Anglo-Chinese School (Barker Road) End-of-Year Examination 2023 2 Secondary 2 Express Science SECTION A (30 marks) Select the best answer and shade it in the OTAS provided. A1 An experiment was carried out to find out if certain objects can float on water. Which data collected is a qualitative data? A the depth that the object sank in the water B the mass of the objects C the temperature of the water D the texture of the objects A2 One tablespoon full of salt was placed into a glass of water. No stirring took place. After five minutes, some salt was seen at the bottom of the glass. Which factor does not affect the solubility of the salt? A size of solute particles B temperature of solvent C type of the solute D type of the solvent A3 An experiment is conducted to investigate the hardness of four different metals. If metal M scratches metal N, a tick (✓) is placed in the corresponding box. Otherwise, a cross (×) is put in the box. N M brass gold steel titanium brass ✓ × × gold × × × steel ✓ ✓ × titanium ✓ ✓ ✓ Which of the following correctly ranks the metals in increasing hardness? A gold, brass, steel, titanium B gold, steel, brass, titanium C titanium, brass, steel, gold D titanium, steel, brass, gold

Anglo-Chinese School (Barker Road) End-of-Year Examination 2023 3 Secondary 2 Express Science A4 Four objects, A, B, C and D, of the same size, were placed in two beakers containing solutions of different densities. Which object has the highest density? A5 Which diagram represents a mixture of two compounds? A C B D

Anglo-Chinese School (Barker Road) End-of-Year Examination 2023 4 Secondary 2 Express Science A6 A ray of light is shone from air, into one side of a rectangular glass block. Which arrow illustrates the correct light ray that enters the glass block? A7 The diagram shows the structure of a leaf. Which part of the diagram identifies a cell, a tissue and an organ? cell tissue organ A 1 4 3 B 2 3 1 C 3 2 4 D 4 1 2 2 3 4 1 A C B D

Anglo-Chinese School (Barker Road) End-of-Year Examination 2023 5 Secondary 2 Express Science A8 When observed under the microscope, pollen grains suspended in a liquid are seen to be in continuous random motion. This is due to ______________________________. A the movement of the wind B the particles of the liquid colliding with the pollen grains C the pollen grains absorbing the liquid particles D the pollen grains being bombarded by dust particles in the air A9 A substance is heated until it boils. The graph shows how the temperature of the substance changes with time. Which part of the graph shows the substance in the solid state? A10 Which is an example of a structural adaptation? A Bears hibernating in winter. B Eagles catching prey using sharp claws. C Hamsters breeding only in the spring. D Monkeys staying in groups for protection from predators. A11 When bees consume nectar produced by flowers, they help to pollinate the flower. What relationship do bees and flowers have between them? A mutualistic relationship B no definite relationship C parasitic relationship D predator-prey relationship

Anglo-Chinese School (Barker Road) End-of-Year Examination 2023 6 Secondary 2 Express Science A12 The diagram shows a food web in a lake. All the perch are killed by water pollution. How will this affect the food web immediately? A The population of algae will increase. B The population of pike will increase. C The population of snails will increase. D The population of tadpoles will decrease. A13 To make gold medals, medals are coated with gold metal through the process of electrolysis. Which effect of electricity is observed during electrolysis? A chemical B heating C lighting D magnetic A14 Which statement correctly describes the need for digestion? A It breaks down food into smaller particles which can be absorbed by the body. B It makes new molecules to build up the body’s different organ systems. C It releases energy for the body to use in growth and repair. D It transports food particles to all parts of the body via the alimentary canal. A15 Which of the following is not true for digestion in the human body? nutrient end-products of digestion A fats fatty acids B fats fatty acids and glycerol C proteins amino acids D starch glucose algae snails tadpoles perch pike

Anglo-Chinese School (Barker Road) End-of-Year Examination 2023 7 Secondary 2 Express Science A16 The diagram below shows part of the human alimentary canal. In which region does digestion not take place? A17 Which statement is incorrect about the use for the end products of digestion? A Amino acids are used to repair damaged tissues. B Carbon dioxide is used to form amino acids. C Glucose is used to provide energy during respiration. D Fats are used to keep our bodies warm. A18 Which is not a good hygiene practice? A Always wash your hands properly before and after handling raw food. B Cook your meat thoroughly before consuming. C Cover raw meet with plastic wrap before putting it into the refrigerator. D Use the same knife when handling raw meat and vegetables. A19 Which is not a benefit of bacteria in the human digestive system? A Bacteria are responsible for producing digestive enzymes. B Bacteria can cause infections and diseases. C Bacteria helps absorb nutrients from the small intestine. D Bacteria helps us to fight off certain diseases. A C B D

Anglo-Chinese School (Barker Road) End-of-Year Examination 2023 8 Secondary 2 Express Science A20 Which component of the blood is responsible for fighting infections? A plasma B platelets C red blood cells D white blood cells A21 The diagram shows a section of a stem. Which tissue is responsible for the transport of sugars? A22 Which is true about diffusion? A Diffusion only happens in liquid and not in gas. B Diffusion requires a partially permeable membrane. C Movement of particles during diffusion is random. D Particles move from a region of lower concentration to a region of higher concentration. A23 Which process allows oxygen and carbon dioxide to move between cells in plants? A breathing B diffusion C photosynthesis D respiration A B C D

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