1st Quarter Exam.docx

UNIVERSITY OF LA SALETTE, INCORPORATED HIGH SCHOOL FIRST QUARTERLY EXAMINATIONS SCHOOL YEAR 2015-2016 SCIENCE AND TECHNOLOGY GRADE 7 – ALL SECTIONS

Name: ______________________________________________ Grade 7-Saint ________________________________________

Date: ____________________ Score: ___________________

I. Multiple Choice DIRECTIONS: Read each item carefully and choose the correct answer. Write the letter of your choice on the space provided before the number. USE CAPITAL LETTERS ONLY. _____1. Which of the following best describes matter? A. Mass and Weight C. Volume and Area B. Weight and Gravity D. Mass and Volume _____2. Which of the following is NOT true about matter? A. Matter is a substance from which all material things made of B. Matter is everything in the universe C. Matter is categorized into mixture or pure substance D. Matter can be solid, liquid or gas _____3. Which of the following sets contains only non-matter? A. Light, Sound, Memories and Batteries B. Light, Lightning strikes, Gravity and Black hole C. Light, Sound, Knowledge and Shadow D. Light, Feelings, Reflection and Gas _____4. Which of the following characteristics best describes solid? A. The molecules are close with each other, making their density low B. The molecules are close with each other, making their density high C. The molecules are far with each other, making their density low D. The molecules are far with each other, making their density high _____5. Why does a liquid fill the shape of a container? A. It has a chemical property B. The matter has changed state C. The particles do not move D. The particles are constantly moving _____6. When a balloon bursts, most of the air escapes and the balloon shrinks. What happens to the balloon? A. The volume of the balloon decreases B. The mass of the balloon increases C. The density of the balloon decreases D. The number of its molecules increases _____7. Which state/s of matter has an indefinite volume and indefinite shape? I. Solid II. Liquid III. Gas A. I only C. III only B. I and II only D. I, II and III _____8. Plasma is considered the fourth state of matter. Which of the following best describes it? A. It contains high positive ions and low negative ions B. It occurs at very low temperatures C. It is a collection of small and large solid ions D. It is composed of charged gaseous particles _____9. What is the simplest form of matter? A. Compound C. Mixture B. Element D. Pure Substance _____10. Which describes a pure substance? A. It has only one kind of atom B. It is composed of two or more elements C. It has a fixed composition and distinct properties D. It is a combination of two or more substances _____11. Why is tap water or salt water classified as a mixture, even though it is clear and colorless? A. If you hold it very close to your eyes, you can see the different particles moving around inside the water B. Any kind of matter that contains more than one element is a mixture C. It contains at least two different substances or particles and can be separated by physical means D. The particles all combine in such a way that the only way they can be separated is by a chemical reaction

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_____12. A metal spoon was left in a pot of boiling soup. The cook scorched a finger by touching the spoon. Why did it happen? A. The metal spoon conducted heat to the cook’s finger B. The metal spoon conducted electricity to the cook’s finger C. The metal spoon chemically reacted with the cook’s finger D. The metal spoon insulated the cook’s finger _____13. Which of the following is true about nonmetals? A. They can be drawn into wire C. They can be hammered into thin sheets B. They are good conductor of electricity D. They are brittle and easy to break _____14. White solid substance A is heated over a flame in the absence of air. It decomposes to form a white substance B and colorless gas C. What can we conclude about substance A? A. It is a compound C. It is an element B. It is a mixture D. It is a colloid _____15. Which of the following is true about periodic table of elements? A. It organizes the elements according to their oxidation number B. It organizes the elements according to their characteristics C. It organizes the elements according to their origin D. It organizes the elements according to their uses _____16. Which is the following is true about groups and periods in the periodic table of elements? A. Groups are the horizontal rows while periods are the columns B. Groups are the columns while periods are the horizontal rows C. Groups are at the right of the zigzag line and periods are at the left D. Groups are at the left of the zigzag line and groups are at the right _____17. Which of these elements will act as a heat conductor? A. Carbon B. Copper C. Phosphorus D. Sulfur _____18. Cans are made from tin and aluminum. What properties of tin or aluminum does this exhibit? A. They can be drawn into wires and can withstand high temperatures. B. They resist corrosion and good conductor of heat and electricity. C. They are good conductors of heat and electricity and can be drawn into wires. D. They can withstand high temperatures and can be hammered into different shapes. _____19. Which statement describes the solute? A. It is the solid formed in solution B. It is the liquid part of the solution C. It is the component of a solution in smaller amount D. It is the component of a solution in larger amount _____20. If you want to make a solution, which would you mix with water? A. Water B. Oil C. Sand D. Alcohol _____21. Which of the following is the fastest way to dissolve a solid in a liquid? A. Stir equal amounts of solids and liquid vigorously B. Mix more liquid in the solid C. Mix more solid in the liquid D. Heat and stir the solid and liquid mixture _____22. When is a solution said to be supersaturated? A. It can still dissolve more solute B. It has reached its maximum amount of solute that it can dissolve thus it can no longer accommodate more solute C. It has amount of solute more than what it can dissolve and was heated to dissolve the added solute D. Its amount of solvent is greater than the amount of solute _____23. Which value corresponds to the pH of pure water? A. 14 B. 7 C. 3 D. 1 _____24. Acetic acid is commonly known as vinegar. Which of the following serves its use? A. Seasoning and preservation C. Seasoning and sweetener B. Seasoning and leavening D. Preservative and sweetener _____25. Why does a person take antacid when he experiences hyperacidity? A. Antacid neutralizes the acid in the stomach B. Antacid calms down the stomach C. Antacid prevents ulcer D. Antacid decreases the pH of stomach

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II. A. Classify the following items either (P) Pure substance or (M) Mixture. Write only the LETTER of the correct answer on the blank provided before each item. ______ 26.Air ______ 31.Sand ______ 27.Aluminum foil ______ 32.Aluminum cans ______ 28.Mango Juice ______ 33.Bronze ______ 29.Diamond ______ 34.Table salt ______ 30.Calcium ______ 35.Soil B. Classify the following items either (A) Acid or (B) Base. Write only the LETTER of the correct answer on the space provided before each item. ______ 36.Soap bar ______ 41.Coffee ______ 37.Calamansi Juice ______ 42.Orange Juice ______ 38.Soda ______ 43.Yakult ______ 39.Shampoo ______ 44.Lemon Juice ______ 40.Vinegar ______ 45.Dishwashing Liquid

III. Complete the table below. Use your own periodic table of elements. Chemical Name

Atomic Symbol

Atomic Number

46-49

Technetium

50-53

Helium

54-57

Calcium

20

58-61

Chromium

24

62-65

Polonium

Atomic Weight

43 He

Number of Protons

(p+)

Number of Electrons (e-)

43

43

4

Po

40

2

Number of Neutrons (n0)

Period

Group

5 2

20

4

24

24

84

84

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VI. Match Column A with Column B. Write your answer on the space provided. A B _______ 66. Collecting pure water from a salt water A. Mechanical _______ 67. Using magnet to pick up iron fillings B. Filtration _______ 68. Used when sugar accidentally mixed C. Decantation with rice D. Evaporation to Dryness _______ 69. Used to separate noodles from water E. Using a separating funnel when cooking pancit canton. F. Dissolution _______ 70. Used by salt farmers in obtaining salts. G. Distillation _______ 71. Separating sand and water using filter paper _______ 72. Used to separate oil and water

V. (73-75) Why is it not advisable to drink softdrinks if you have not eaten your breakfast?

VI. (76-80) Draw and label the parts of an atom.

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