Grade 8 Science AssessmentInstructions: Answer each question carefully. Write your answer in the space provided.Please enable JavaScript in your browser to complete this form.Please enable JavaScript in your browser to complete this form.Name *FirstLastGrade *Contact Number *Phone number or WhatsApp number1. What is the law of conservation of mass?2. What is the difference between an ionic bond and a covalent bond?3. What is the primary function of DNA in living organisms?4. Name the three types of plate boundaries and describe each.5. What is the process by which plants convert carbon dioxide into glucose using sunlight?a) condensationb) photosynthesisc) glycogenesisd) precipitation6. What is an ecosystem, and what are its components?7. What is the significance of the periodic table in chemistry?8. What do we call the change of state from liquid to gas?a) condensationb) evaporationc) precipitationd) collection9. What is Newton's second law of motion?10. What are acids and bases, and how do they differ in terms of pH?11. Name one renewable energy source and one non-renewable energy source12. What is the role of enzymes in biological reactions?13. What are the four main types of macromolecules found in living organisms?14. Describe the greenhouse effect and its impact on climate change.15. What is a hypothesis, and how does it differ from a theory?16. Which organ in the human body is responsible for pumping blood?a) Hypothalamusb) Heartc) Braind) Spinal cord does plants using 17. What do we call the process by which cells divide to form two identical daughter cells?a) mitosisb) meiosisc) anaphased) telophase18. Name one example of a physical change and one example of a chemical change19. What are trophic levels in an ecosystem?20. What is the difference between weather and climate?21. Describe how natural selection leads to evolution.22. What is an atom, and what are its main components?23. What role do producers play in an ecosystem?24. Define biodiversity and explain its importance to ecosystems.25. What are the main gases that make up Earth's atmosphere?26. What is homeostasis, and why is it important for living organisms?27. Name one major organelle found in plant cells but not in animal cells.28. What is the scientific method, and what are its basic steps?29. How do vaccines work to protect against diseases?30. Explain the concept of sustainability in environmental science.Assess My Answers
