Integrated Sciences Weekly Assessment 2025 PDF

Weekly assessment 2025 Week 1st Year  secondary Prepared and reviewed by Science Development Office  Weekly assess...

Weekly assessment 2025 Week 1st Year  secondary Prepared and reviewed by Science Development Office  Weekly assessment Choose the correct answer 1) Which of the following diagrams correctly represents the structure of a water molecule and the angle between the two covalent bonds in it? O H O H O H H O H H H H (A) ○ (B )○ (C )○ (D) ○ 2) In the opposite figure what is the type of bond? choice In the water molecule between water molecules A Covalent Hydrogen B Covalent Covalent C Hydrogen Covalent D Hydrogen Hydrogen 3) The plant gets rid of water through the stomata, a process known as………………. A. Transpiration B. Breathing C. digestion D. Absorption 4) Production and respiration are vital processes that exist in the hydrological cycle. These vital processes occur as follows: Management of the development of the material choice Transpiration occurs in Breathing occurs in A Plant without animal Plants and animals B Plant without animal Animal without plant C Plants and animals Plants and animals D Plant without animal Plants and animals Page |2 5) Read statements carefully, then choose: When table salt dissolves in water, the sodium and chloride ions are surrounded by water molecules, Statement (1): The sodium ions are surrounded by water molecules, and the water is attracted from the oxygen side. Statement (2): The chloride ions are surrounded by water molecules, and the water is attracted from the oxygen side. choice statement (1) statement (2) A right right B false right C right false D false false 6) Water is a polar compound because: A. Oxygen carries a positive charge, hydrogen carries a negative charge. B. The electronegativity of hydrogen is greater than the electronegativity of oxygen. C. Oxygen carries a partial positive charge; hydrogen carries a partial negative charge. D. Oxygen carries a partial negative charge; hydrogen carries a partial positive charge. 7) The polarity of the water molecule is due to: A. The number of atoms that make up a water molecule is only three atoms. B. The electronegativity of hydrogen is greater than the electronegativity of oxygen. C. The electronegativity of oxygen is greater than the electronegativity of hydrogen. D. The electronegativity of hydrogen is equal to the electronegativity of oxygen. 8) When comparing the boiling point of water with the boiling point of a compound similar in composition, such as hydrogen sulfide, we notice: A. The boiling point of water is high, due to the presence of hydrogen bonds between its molecules. B. The boiling point of water decreases due to the presence of hydrogen bonds between its molecules. C. The boiling point of hydrogen sulfide is high, due to the presence of hydrogen bonds between its molecules. D. The boiling point of hydrogen sulfide is low, due to the presence of hydrogen bonds between its molecules. 9) All of the following are consequences of the polarity of the water molecule except: A. Water molecules are linked together by hydrogen bonds. B. The ability to dissolve many mineral salts. C. The boiling point of water rises to 100. D. The ability to dissolve a non-polar organic compound. Page |3  10) Four students measured the pH value of four water samples and recorded the value in the table in the designated place:. Student A B C D Water Sea water Fresh water Distilled water Clouds PH 7 5.5 5 4.5 Which student's measurement was correct? 1- A 2- B 3- C 4- D 11) Four students measured the pH value of four water samples and recorded the value in the table in the designated place: STUDENT A B C D WATER cloud Ground water sea water fresh SEA WATER PH 6 7 7 8 Which student was measured wrong? 1- A 2- B 3- C 4- D 12) Which of the following graphs expresses the percentage of water and the percentage of land on the surface of the Earth? 13) Which of the following graphs expresses the ratio of salt water to fresh water on the surface of the Earth? Page |4 14) Which of the following graphs represents the pH of a sample of seawater (X) and another sample of clouds? 15) Which of the following graphs represents the pH of a sample of table salt solution (X) and another sample of Ammonium chloride (Y) ? 16) Which of the following graphs represents the pH of a sample of table salt solution (X) and another sample of Sodium bicarbonate (Y) Page |5 17) When electrolysis was performed on a quantity of water and the resulting hydrogen gas and oxygen gas were collected separately, the total volume is equal to 60 cm3. Then choice Hydrogen gas volume Oxygen gas volume A 60 cm³ 60 cm³ B 30 cm³ 30 cm³ C 20 cm³ 40 cm³ D 40 cm³ 20 cm³ 18) When sodium chloride is dissolved in water, then: choice hydrogen ion hydroxyl ion concentration concentration A It decreases It decreases B Doesn't change Doesn't change C It increases It decreases D It decreases It increases 19) When sodium bicarbonate dissolves in water, then: choice hydrogen ion hydroxyl ion concentration concentration A It decreases It decreases B Doesn't change Doesn't change C It decreases It decreases D It decreases It decreases 20) When ammonium chloride salt is added to water, then: choice hydrogen ion concentration hydroxyl ion concentration A It decreases It decreases B Doesn't change Doesn't change C It increases It decreases D It decreases It increases 21) The solution resulting from dissolving table salt in water is neutral because: A. The salt ions remain in the solution due to their association with water ions. B. The association of all salt ions in the solution with water ions. C. Sodium ions in solution bind to water ions D. The association of chloride ions in solution with water ions Page |6 22) The solution resulting from dissolving sodium bicarbonate in water is basic because: A. The concentration of [H] ions equals the concentration of |OH ions. B. The concentration of [H] ions decreases and the concentration of |OH ions increases. C. Increase in [H] ion concentration and decrease in |OH| ion concentration D. Low concentration of [H] ions and low concentration of 1-OH ions 23) The solution resulting from dissolving ammonium chloride salt in water is acidic because: A. The concentration of [H] ions is equal to the concentration of [OH] ions. b. Low concentration of [H] ions and high concentration of [OH] ions c. Increase the concentration of [H] ions and low concentration of [OH] ions d. Low ion concentration of [H] ions And a decrease in the concentration of OH ions 24) Table salt solution choice Solution type The relationship [H] and PH value OH A neutral [OH = [H+] equals 7 B Acidic [OH]