c Grade 10 Angel International School - Manipay 1 st Term Examination November, 2016 Science I & II Duration: 3 Hours Index No:- 1) The most essential organelle that should be present in a typical cell to pass hereditary characteristics to the next generation a. Cell membrane b. Golgi body c. nucleus d. mitochondria 2) Removing waste products of metabolism from the body is a characteristic of organisms. This process is called a. Excretion b. nutrition c. reproduction d. respiration 3) The correct statement regarding liver a. It secretes maltase enzyme b. It produces bile c. Red blood cells are produced in it d. Acts like an endocrine gland 4) During inspiration a. Intercostal muscles contract and diaphragm muscle relaxes b. Intercostal muscles contract and diaphragm muscle contract c. Intercostal muscles relax and diaphragm muscle contract d. Intercostal muscles relax and diaphragm muscle relaxes 5) Although blood does not clot within blood vessels, blood clotting occurs when a blood vessel gets damaged. Which statement given below explains this observation? a. Clotting occurs only when blood comes out of the body. b. Blood clotting occurs only when blood vessels get damaged activating the platelets. c. Blood clotting occurs when blood platelets form into a clot and other cells get deposited around it. d. Since blood cells are living cells they do not clot inside the body but clotting occurs when they come out and become dead cells. 6) Enzymes that function well in an acidic medium are a. Pepsin and renin b. Pepsin and amylase c. Amylase and trypsin d. Lipase and amylase 7) An ailing condition that may occur due to breathing of polluted air is a. Bronchitis b. hepatitis c. gastritis d. nephritis 8) A structure that could be seen in a plant cell but not in an animal cell is a. Mitochondria b. cell wall c. cytoplasm d. plasma membrane 9) Which one out of the following factors essential for photosynthesis, cannot be tested experimentally in the lab is a. Light b. water c. chlorophyll d. carbon dioxide 10) Given below are three statements with regard, to photosynthesis and respiration. A. Respiration is the reverse reaction of the photosynthetic reaction. B. Photosynthesis produces energy and respiration also produces energy. C. Organisms with chloroplasts photosynthesize and all organisms respire. Which of the above statements are correct? a. A only b. A and B only c. A and C only d. B and C only 11) Of the following which gas can be used as a fuel? a. Hydrogen b. Nitrogen c. Oxygen d. Carbon dioxide 12) What is the formula of the compound formed by the element X of atomic number 13, combining with oxygen? a. XO2 b. X2O3 c. X2O d. XO 1
13) Which of the following gives the correct number of atoms of carbon, oxygen, nitrogen and hydrogen respectively in a molecule of urea - CO(NH2)2? a) 1,1,1 and 2 b) 2, 2,2 and 4 c) 1,1,2 and 4 d) 1,1,2 and 2 14) 15) When the same note is played by a violin and a flute separately a person who listens to it can identify the difference. The characteristic of sound that helps to identify this difference is a) The pitch of the sound c) The quality of the sound b) The loudness of the sound d) The amplitude of the sound 16) Of carbon, graphite and diamond are a) Isotopes b) Allotropes c) Compounds d) Different physical states 17) Who invented the electrons a) Rutherford b) Chadwick c) Thomson d) Neil bohr 18) What is a mass number of an atom a) Number of neutrons b) Number of protons c) Number of electrons + protons d) Number of protons + neutrons 19) Which of the following will engage in chemical reactions a) Protons b) Neutrons c) Electrons d) Positrons 20) Who put forwarded the term Energy Levels a) Rutherford b) Chadwick c) Thomson d) Neil bohr 21) When an atom loses electrons a) It becomes positive b) It becomes negative 22) Which of the following is not a feature of a sound wave a) Pitch b) Loudness 23) When the amplitude of a sound increases a) The pitch increases b) The pitch decreases c) It becomes acidic d) It becomes basic c) Frequency d) Quality of sound c) The loudness increases d) The loudness decreases 24) If 2400 waves can be produced by a tunic fork in 2 minutes, what is its frequency a) 1200Hz b) 20Hz c) 120Hz d) 200Hz 25) Which of the following is not an electromagnetic wave a) Light b) X-ray c) Heat d) Sound 26) Which animal uses echo for its movement at dark a) Human b) Bat c) Goat d) Fish 27) Where does the bicuspid or mitral valve present in the heart a) Right atrium- right ventricle b) Right atrium-left atrium c) Left atrium-left ventricle d) Right ventricle-left ventricle 28) Lipids will be absorbed in the villi by a) Hepatic portal vein b) Lacteal c) Semi lunar valve d) Nerves 29) The speed of sound in water is a) Faster than in solid b) Faster than in air c) Slower than air d) Equal to solid 30) Velocity of the wave is calculated using a) V=amplitude wave lenght b) V=frequency amplitude c) V=wave length frequency d) V= wave length / frequency 2
Structured essay 1. The following figure shows the alimentary canal and associated organs. a. Label the sites of each of the following processes on the given diagram. A. absorption of water B. bile production C. glycogen storage D. lipase production b. Complete the following table about the digestive enzymes. 2. The following figure shows the human respiratory system. 3
a. Label the parts on the diagram. b. What is the function of part 3? c. Which structure prevents the food from entering the respiratory tract? d. What is the epithelium found in part 11? e. What are the special features that should be present in part 11 for effective gas exchange? 3. The following chart shows how the displacement of particles in a wave varies with distance from the source. 4
a. Use the figure to determine (i) The wavelength,... cm (ii) The amplitude.... mm b. The wave shown in above figure has a frequency of 5.0 Hz. (i) State what is meant by frequency....... (ii) Use your answer to (a) (i) to calculate the speed of the wave. 4. The diagram represents the nuclei of five different atoms, A, B, C, D and E. A. Choose from the letters A, B, C, D and E, to answer the following questions. (a) Which atom has a nucleon number of 6?... (b) Which two atoms have three electrons in their outermost electron shell?... and... (c) Which two atoms are isotopes of the same element?... and (d) Which atom is an isotope of hydrogen?... Essay questions 1. The following figure shows a human heart. 5
a. Label the parts 1-6. b. Fill the following table by mentioning the place of the movement of blood. Part Takes blood from Takes blood to 1 2 3 4 5 6 c. Why the wall of the left ventricle is thicker than the other walls? d. What is the difference between artery and vein? e. What can you say about the blood present in pulmonary artery and pulmonary vein when comparing with the other arteries and veins? f. What is the special vein that starts and ends in organs? g. What are the diseases related with the human blood circulatory system? 2. h. After having a meal, what can you say about the glucose level in the blood found in the vessels M and N? a. What are the biological molecules found in living things? b. Fill the following table based on the biological molecules. Biological molecule Elements found in them Foods in which they are found 1 2 3 4 6
c. What are the 3 main divisions of carbohydrates? Saccharides Example Monosaccharide Disaccharide 7 Glucose 1... 2.. Maltose 4. 5 8.. 9. 10 Glucose + 3... Glucose+fructose 6 d. Give the tests for all 4 biological molecules separately. 3. a. What are the subatomic particles? b. Who invented each particle? c. Explain about the following models. 1. Plum pudding model. 2. Planetary model. d. Write the electronic configuration of the following. 1. Ca 2. Ar 3. Cl 4. Al 3+ 5. Cl e. Write the equation for the following compounds. 1. Magnesium chloride 2. Aluminium hydroxide 3. Carbon dioxide 4. Calcium chloride 5. Urea f. Find the relative molecular mass for the above compounds. g. Find the number atoms found in 320g of urea. 7
4. a. What are the two main types of waves? Give the differences between them. b. Some sailors use sound waves to measure the depth of water beneath their ship. A pulse of sound is transmitted to the sea bed and returns to the ship. (a) State why the pulse of sound returns to the ship. (b) Sound is a longitudinal wave. Explain what is meant by a longitudinal wave. (c) The time taken for the sound pulse to reach the sea bed and then return to the ship is 0.10 s. The speed of sound in sea water is 1500 m / s. Calculate the depth of the sea. depth =... m c. Explain the following scientifically. 1. In some rainy days the bell sound of a distant church can be heard easily than the other days. 2. Insects respond for a very minute vibration than human. 3. In a bell jar why we are unable to hear the bell sound though we can see the bell ringing. ***** 8