Science 4 Past Paper PDF

Name: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Score: \_\_\_\_\_ School: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_...

Name: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Score: \_\_\_\_\_ School: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date: \_\_\_\_\_ **Science 4** *First Periodical Examination* **Read and understand the sentences and questions you answer. Encircle the letter of the correct answer.** 1\. Who invented the video telephone? a\. Gregorio Y. Zara c. Thomas Edison b\. Alexander Graham Bell d. Wright Brother 2\. What did Gregorio Y. Zara invent besides the videophone? a\. Light bulb b. Solar-powered water heater c. Phonograph d. Airplane 3\. Which Filipino scientist is known for inventing the jeepney? a\. Gregorio Y. Zara c. Diosdado Banatao b\. Leonardo Salvador d. Narciso Mosuela 4\. What is one of the inventions by Roberto del Rosario? a\. Karaoke b. Microwave oven c. Airplane d. Computer 5\. The following invention is used as a cleaning material. a\. cellphone b. bath soap c. scissors d. pen 6\. This waste is decomposed and degraded by microbes or microorganisms. a\. biodegradable b. non- biodegradable c. combustion d. flammable 7\. The degradation of this material is slower and some take years and decades. a\. biodegradable b. non- biodegradable c. combustion d. flammable 8\. This wastes cannot be broken down or removed by natural processes a\. biodegradable b. non- biodegradable c. combustion d. flammable 9\. The following wastes are recyclable. a\. plastic bottle b. banana peeling c. vegetable peelings d. used paper towels 10\. It measures how quickly a specific material can catch fire and burn. a\. degradability b. combustibility c. flammability d. accountability 11\. What can cause land pollution? a\. Planting more trees c. Dumping of garbage and hazardous waste b\. Proper disposal of waste d. Cleaning up parks and recreational areas 12\. What is the primary cause of air pollution in urban areas? a Factories b. Cars c. Trees d. Animals 13\. What is pollution? a\. Clean air c. Dirty and harmful things in the air, water, or land b\. Fresh water d. Healthy soil 14\. What should we do with trash to keep the environment clean? a\. Throw it on the ground b. Burn it c. Recycle it d. Hide it 15\. What can we do to help reduce pollution? a\. Use more cars b. Plant more trees c. Waste water d. Throw trash everywhere **Read carefully the following sentences. Write *[true]* if the statement is correct and *[false]* if it is not.** \_\_\_\_\_\_\_\_\_\_\_\_\_16. Paper is highly flammable and burns quickly when ignited. \_\_\_\_\_\_\_\_\_\_\_\_\_17. Aluminum is a flammable metal and can easily catch fire. \_\_\_\_\_\_\_\_\_\_\_\_\_18. Degradable materials can be broken down into simpler substances by living organisms. \_\_\_\_\_\_\_\_\_\_\_\_\_19. The rusting of iron is an example of a chemical reaction with air and moisture. \_\_\_\_\_\_\_\_\_\_\_\_\_20. Biodegradable materials can be composted, returning nutrients to the soil. \_\_\_\_\_\_\_\_\_\_\_\_\_21. Pollution can have harmful effects on human health. \_\_\_\_\_\_\_\_\_\_\_\_\_22. Food waste has no impact on climate change. \_\_\_\_\_\_\_\_\_\_\_\_\_23. Deforestation can lead to the destruction of wildlife habitats. \_\_\_\_\_\_\_\_\_\_\_\_\_24. Segregating waste into biodegradable and non-biodegradable categories helps in proper waste management. \_\_\_\_\_\_\_\_\_\_\_\_\_25. Only adults are responsible for caring for the environment. \_\_\_\_\_\_\_\_\_\_\_\_\_26. Improper disposal of garbage can lead to water pollution. \_\_\_\_\_\_\_\_\_\_\_\_\_27. Burning fossil fuels does not contribute to air pollution. \_\_\_\_\_\_\_\_\_\_\_\_\_28. Recycling and reusing materials can help reduce environmental problems. \_\_\_\_\_\_\_\_\_\_\_\_\_29. Land pollution has no impact on the health of plants and animals. \_\_\_\_\_\_\_\_\_\_\_\_\_30. Public awareness and education are important in solving environmental issues. **Identify the changes in the properties of the materials: [freezing],** [m**elting**]**, [evaporation], [condensation], [sublimation].** \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_31. Dry ice turning directly into gas without becoming liquid. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_32. Water turning into ice in a freezer. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_33. Ice cream turning into liquid on a hot day. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_34. Water disappearing from a puddle on a sunny day. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_35. Water droplets forming on the outside of a cold glass. **Classify the chemical properties of the materials if it is [combustible] or [flammable].** 36\. Wood - \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 37\. Gasoline - \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 38\. Paper - \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 39\. Alcohol - \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 40\. Plastic - \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Name: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Score: \_\_\_\_\_\_\_\_\_\_\_ School: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date: \_\_\_\_\_\_\_\_\_\_\_ **Science 5** *First Periodical Examination* **Read and understand the sentences and questions you answer. Encircle the letter of the correct answer.** 1\. Which picture shows the best example of a material that can be stretched and then returned to its original size and shape after? +-----------------+-----------------+-----------------+-----------------+ | A group of |  | c | Philippines](me | | low confidence | | | dia/image4.jpeg | | | b | | ) | | a | | | | | | | | d | +-----------------+-----------------+-----------------+-----------------+ 2\. Glass easily break when dropped or slammed against a hard surface. What physical properties is exhibited by these objects? a\. brittleness b. conductivity c. ductility d. elasticity 3\. Which of the following materials is the best conductor of electricity? a\. Wood b. Plastic c. Copper d. Glass 4\. It is a physical property that measures how resistant a material is to being scratched, dented, or changed in shape. a\. Malleability b. Ductility c. Hardness d. Brittleness 5\. Which material is known for its high tensile strength and is commonly used in construction? a\. Rubber b. Steel c. Aluminum d. Glass Write [true] if the statement is correct and [false] if it is not. \_\_\_\_\_\_\_\_\_\_\_\_\_6. Water is useful for drinking and staying healthy. \_\_\_\_\_\_\_\_\_\_\_\_\_7. Plastics are useful even if not recycled. \_\_\_\_\_\_\_\_\_\_\_\_\_8. Broken glass is useful. \_\_\_\_\_\_\_\_\_\_\_\_\_9. Wood is useful for furniture and houses. \_\_\_\_\_\_\_\_\_\_\_\_\_10. Metal is useful for cars and tools. \_\_\_\_\_\_\_\_\_\_\_\_\_11. Paper is useful for writing and drawing. \_\_\_\_\_\_\_\_\_\_\_\_\_12. Rubber is useful for tires and erasers. \_\_\_\_\_\_\_\_\_\_\_\_\_13. Cotton is useful for clothes. \_\_\_\_\_\_\_\_\_\_\_\_\_14. Soap is useful for cleaning. \_\_\_\_\_\_\_\_\_\_\_\_\_15. Salt is useful even if eaten in large amounts. \_\_\_\_\_\_\_\_\_\_\_\_\_16. Eating too much or too little sugar is useful. \_\_\_\_\_\_\_\_\_\_\_\_\_17. Oil is useful if spilled in nature. \_\_\_\_\_\_\_\_\_\_\_\_\_18. Paint is useful for coloring. \_\_\_\_\_\_\_\_\_\_\_\_\_19. Batteries are useful for devices. \_\_\_\_\_\_\_\_\_\_\_\_\_20. Medicine is useful for treating illnesses. \_\_\_\_\_\_\_\_\_\_\_\_\_21. Consumers must read product labels when buying grocery items. \_\_\_\_\_\_\_\_\_\_\_\_\_22. Place fertilizers in containers and label them as edible. \_\_\_\_\_\_\_\_\_\_\_\_\_23. Throw away anywhere the plastic bottles after using them. \_\_\_\_\_\_\_\_\_\_\_\_\_24. Labels are not important in classifying materials as useful or harmful.\_\_\_\_\_\_\_\_\_\_\_\_\_25. Food allergen warnings are helpful, especially for those who have allergies **Write [physical] for Physical Change and [chemical] for Chemical Change.** 26\. Melting ice - \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 31. Baking a cake- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 27\. Boiling water- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 32. Burning wood- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 28\. Melting butter- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 33. Cooking an egg- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 29\. Evaporating alcohol- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 34. Rusting iron- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 30\. Sublimation of dry ice- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 35. Toasting bread- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ **Manage the following wastes. Write reduced, reused, recycled, recovered, or repaired** 36\. Plastic bottles- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 41. Old clothes- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 37\. Broken toys- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 42. Food scraps- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 38\. Paper- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 43. Glass jars- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 39\. Electronics- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 44. Metal cans- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 40\. Old furniture- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 45. Plastic bags- \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ **Identify the properties of materials. Write malleable, hard, durable, elastic, or electrical.** \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 46. Gold (Can be hammered into thin sheets) \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 47. Diamond (Very tough and hard to scratch) \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 48. Steel (Strong and lasts a long time) \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 49. Rubber (Can stretch and bounce back) \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 50. Copper (Good at carrying electricity) Name: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Score: \_\_\_\_\_\_\_\_\_\_\_ School: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date: \_\_\_\_\_\_\_\_\_\_\_ **Science 6** *First Periodical Examination* **Read and understand the sentences and questions you answer. Encircle the letter of the correct answer.** 1. Which of the following is an example of a homogeneous mixture? a. Sand and water b. Oil and water c. Salt dissolved in water d. Iron filings and sulfur 2. What type of mixture has visibly different parts or phases? a. Homogeneous mixture b. Heterogeneous mixture c. Solution d. Colloid 3. Which method is commonly used to separate a solid from a liquid in a heterogeneous mixture? a. Filtration b. Evaporation c. Distillation d. Chromatography 4. What is the term for a mixture where particles are dispersed throughout but do not settle out? a. Solution b. Suspension c. Colloid d. Alloy 5. Which of the following is an example of a colloid? a. Saltwater b. Milk c. Sugar solution d. Sand and iron filings **Choose the corresponding term in the box for the following description. Write the letter of the correct answer.** \_\_\_\_\_\_\_\_\_\_ 6. formed when substances are combined. \_\_\_\_\_\_\_\_\_\_ 7. It is how well a substance dissolves in a solvent. \_\_\_\_\_\_\_\_\_\_ 8. Process of separating by pouring off liquid, leaving solid behind \_\_\_\_\_\_\_\_\_\_ 9. A mixture with substances that are distributed Evenly or uniform. \_\_\_\_\_\_\_\_\_\_ 10. A mixture in which a particles can be distinguished. \_\_\_\_\_\_\_\_\_\_ 11. A mixture with dispersed particles that do not settle. \_\_\_\_\_\_\_\_\_\_ 12. A mixture with particles that do not completely dissolve in liquid. \_\_\_\_\_\_\_\_\_\_ 13. the substance that dissolves a given solute \_\_\_\_\_\_\_\_\_\_ 14. the substance being dissolved \_\_\_\_\_\_\_\_\_\_ 15. Process of separating solid particles by size using sieve. **Classify each substance. Write solution, suspension, or colloid on the line.** \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 16. Syrup \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 21. Mayonnaise \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 17. hot coffee \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 22. Hair spray \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 18. Muddy water \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 23. Iced tea \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 19. Paint \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 24. Milk \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 20. Buko juice \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 25. Dust **Choose the method that can be used to separate the substances or materials in each mixture. Write Decantation, Use of magnet, Filtration, Sieving, Evaporation on the blanks.** \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 26. Coconut oil and milk \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 27. Needles in a box of beads \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 28. Ground pepper and water \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 29. Pebbles and soil \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 30. Salt solution \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 31. Seeds in soy sauce \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 32. Flour and coarsely ground corn \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 33. Washing rice grains \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 34. Rice grains and stones \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 35. Grated melon pulp and juice **Write [true] if the statement is correct and [false] if it is not.** \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_36. Solubility refers to how well a substance (solute) can dissolve in a solvent to form a homogeneous solution. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_37. Temperature often affects solubility; for many solids, solubility increases with temperature. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_38. The solubility of gases in liquids increases with an increase in pressure. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_39. Higher temperatures usually decrease the solubility of gases in liquids. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_40. A saturated solution has reached its solubility limit at a specific temperature. **Identify the types of colloids (gel, sol, foam, aerosol, emulsion)** \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 41. Gelatin *(solid dispersed in liquid)* \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 42. Blood *(solid dispersed in liquid)* \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 43. Whipped Cream *(gas dispersed in liquid)* \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 44. Smog *(solid dispersed in gas)* \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 45. Toothpaste *(solid dispersed in liquid)* \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 46. Shampoo *(solid dispersed in liquid)* \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 47. Paint *(solid dispersed in liquid)* \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 48. Milk *(liquid dispersed in liquid)* \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 49. Mud *(solid dispersed in liquid)* \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ 50. Smoke *(solid dispersed in gas)*