BTYSS Sec 2 Science 2025 EOY (Section A)

BEATTY SECONDARY SCHOOL END-OF-YEAR EXAMINATION 2025 SECONDARY TWO G3 CANDIDATE NAME CLASS REGISTER NUMBER LOWER SECONDARY SCIENCE 6 October 2025 Setter: Ms Ain Sections A, B and C: 2 hours Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST This Lower Secondary Science Paper consists of 3 sections – Sections A, B and C. SECTION A (30 MARKS) You are advised to spend no more than 30 minutes on Section A. Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and register number on the Multiple Choice Answer Sheet provided. There are thirty questions on this paper. Answer all questions. For each question 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 Answer Sheet. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. A copy of the Periodic Table is printed on page 16. The use of an approved scientific calculator is expected, where appropriate. For Examiner’s Use A 30 This document consists of 16 printed pages. [Turn over

2 Section A Answer all the questions in this section on the Multiple Choice Answer Sheet provided. 1 The statements are written by a student who is carrying out an experiment on plants. Plant A, which received 8 hours of light a day, grew 3 cm in a day on average. Plant B, which received 5 hours of light a day, grew 2 cm in a day on average. This shows that plants that receive more light will grow taller. Which stage of the scientific method is indicated by the student’s statements? A asking a question B constructing a hypothesis C drawing a conclusion D making an observation 2 A student tested the precision and accuracy of an electronic mass balance using a 10.00 g mass. His results are shown in the table. description reading / g no object placed - 2.50 g one 10.00 g mass 7.50 g 7.50 g 7.50 g What can the student conclude about the obtained readings? A The readings are affected by parallax error and are not precise. B The readings are affected by parallax error but are precise. C The readings are affected by zero error and are not precise. D The readings are affected by zero error but are precise.

3 3 The diagram shows the melting points of a mixture of lead and tin. Which statement is correct? 1 A mixture with more lead will melt above 232 °C. 2 Any mixture of tin and lead will melt below 327 °C. 3 The melting point of the mixture increases as more lead is added. A 1 only B 2 only C 3 only D none of the above 4 A hardness scratch test was conducted on four materials, W, X, Y and Z. • W is left with a mark when X is rubbed with it. • Y is scratched by the other three materials and is left with a mark. • When rubbed with Z, all three materials are left with a mark. Which is the correct order of hardness for the four materials? hardest softest A X > Y > Z > W B Y > W > X > Z C Z > X > W > Y D Z > Y > X > W % lead in mixture 100 % 0 % 232 °C melting point of pure tin 327 °C melting point of pure lead

4 5 Four identical small plasticine blocks, each with a density of 1300 kg/m3, are remoulded to form a large plasticine block. What is the density of the large plasticine block? A 325 kg/m3 B 1300 kg/m3 C 2600 kg/m3 D 5200 kg/m3 6 The graph shows how the solubility values of three salts P, Q and R, change with temperature. Which statement is correct? A P has the highest solubility in water. B R has the highest solubility in water. C When 50 g of R is added to 100 g of water at 20 °C, a solution is obtained. D When 100 g of Q is added to 100 g of water at 40 °C, only 60 g of Q can dissolve. solubility of solute / g in 100 g of water temperature / °C R Q P

5 7 Solution X contains one or more of three substances, L, M, and N. Two different solvents are used to produce two chromatograms comparing X with the three substances. The results are shown. What does X contain? A L only B M only C L and M D M and N 8 A student wishes to extract a coloured solution from some berries to make an indicator solution. Which steps should the student follow in sequence? 1 add a solvent 2 add acid 3 crush the berries 4 distil the mixture 5 filter the mixture A 2, 1 and 4 B 2, 5 and 4 C 3, 1 and 5 D 3, 2 and 5 X L M N X L M N solvent 1 solvent 2 solvent front start line solvent flow

6 9 Which diagram shows a mixture of elements and compounds? 10 The word HAT was written on a piece of paper. Two mirrors, X and Y, were held standing vertically on two sides of the paper as shown in the diagram. Which images would be seen when the observer looks into mirrors X and Y? image in mirror X image in mirror Y A TAH B TAH C HAT HAT D TAH HAT 11 Which statements are not true about the nucleus of a cell? I It contains thread-like structures responsible for hereditary factors. II It contains tiny discs which have a green substance to absorb sunlight. III It is made of cellulose and gives the cell its shape. IV It is the site where most chemical reactions take place within the cell. A I and IV only B II and III only C I, III and IV only D II, III and IV only TAH TAH mirror X mirror Y HAT

7 12 The diagram (not drawn to scale) shows a ray of light incident on two plane mirrors, M1 and M2. Which row correctly shows the angle of incidence at mirror M 1 and the angle of reflection at mirror M2? angle of incidence at M1 angle of incidence at M2 A 40° 40° B 40° 50° C 50° 40° D 50° 50° 13 The diagrams show the arrangement of particles in a substance at different temperatures. Which substance, A, B, C or D, could the diagrams represent? substance melting point / ºC boiling point / ºC A − 272 − 268 B − 250 − 215 C − 115 − 41 D 10 130 M1 M2 50° − 272 ºC − 269 ºC − 300 ºC

8 14 Which statement about atoms is correct? A The mass of an atom is entirely due to its nucleus. B The nucleus and electrons repel each other. C The proton number of elements decreases from left to right of the Periodic Table. D The protons and neutrons have opposite charges. 15 The table shows the main ingredients found in a carbonated drink. ingredient chemical formula caffeine C8H10N4O2 carbonic acid H2CO3 citric acid C6H8O7 sucrose C12H22O11 Which statement is not true about the substances listed? A The atomic number of the carbon atom is the same in all the substances. B The number of elements is the same in all the substances. C They are all molecules of compounds. D The sucrose molecule contains the greatest number of atoms. 16 Which planet has the greatest gravitational field strength? planet mass / kg weight / N A 0.0025 0.25 B 0.0025 0.50 C 0.0050 0.50 D 0.0100 0.50

9 17 The diagram shows part of a car with its wheel in contact and moving on a road. What is the correct direction of movement of the wheel and frictional force acting on it? A B C D direction in which car is moving car wheel road

10 18 A student is seated on a four-legged chair as shown. The area of contact of each leg of the chair with the floor is 0.005 m2. If t