Combined Science quiz

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30 science questions

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theva valu

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Combined Science quiz


Froggy Jumps Combined Science quizVersión en línea 30 science questions por theva valu 1 1. Which characteristic of living organisms directly depends on metabolic reactions releasing energy? a Growth b Respiration c Reproduction 2 2. Which structure is present in plant cells but absent in animal cells? a Mitochondria b Cell wall c Ribosomes 3 3. A cell placed in a concentrated salt solution shrinks. What is the main reason? a Water moving out by osmosis b Water moving in by diffusion c Active transport of sodium into the cell 4 4. Diffusion rate increases when: a Concentration gradient increases b Temperature decreases c Surface area decreases 5 5. Which statement about enzymes is correct? a High temperature increases activity indefinitely b Enzymes are proteins with specific active sites c Enzymes are used up in reactions 6 6. Denaturation of enzymes occurs because: a Temperature is too low b Active site permanently changes shape c Substrate concentration increases 7 7. Which factor does NOT directly affect photosynthesis? a Carbon dioxide concentration b Wavelength of light c Soil pH 8 8. Which structure transports sucrose in plants? a Stomata b Xylem c Phloem 9 9. Which is the correct order of human digestion? a Digestion → Absorption → Assimilation b Assimilation → Absorption → Digestion c Absorption → Digestion → Egestion 10 10. Which nutrient provides the highest energy per gram? a Proteins b Carbohydrates c Fats 11 11. Which describes an element? a Two atoms chemically combined b Substance made of identical atoms c Substance containing positive and negative ions 12 12. What is the mass number of an atom? a Number of protons + neutrons b Number of electrons c Number of neutrons only 13 14. Which is a property of transition metals? a Form coloured compounds b Very reactive with water c Low melting point 14 15. Which is a trend across Period 3 from left to right? a Atomic radius increases b Electronegativity decreases c metallic character decreases 15 16. A resultant force acts on an object. Which must occur? a Object accelerates b Object remains stationary c Mass increases 16 17. A car accelerates from 10 m/s to 20 m/s in 5 s. What is the acceleration? a 3 m/s2 b 4 m/s2 c 2 m/s2 17 18. A train travels 150 km in 2.5 hours. What is the average speed? a 40 km/h b 50 km/h c 60 km/h 18 19. Which is a vector quantity? a Force b Temperature c Speed 19 20. Energy cannot be: a Stored b Created c Transferred 20 21. Which process converts chemical energy into kinetic energy in the human body? a Digestion b Breathing c Movement of muscles 21 22. Which equation is correct for kinetic energy? a KE = mv b KE = 1/2 mv^2 c KE = mg/h 22 23. Work done is defined as: a Mass × acceleration b Force × time c Force × distance moved in direction of force 23 24. What is the unit of power? a Joule b Newton c Watt 24 25. A 50 N force moves an object 3 m. Work done = ? a 53 J b 150 J c 17 J 25 26. Which part of the cell controls cell division? a Cell membrane b Ribosome c Nucleus 26 27. In active transport: a Movement occurs only in gases b Particles move down the concentration gradient c ATP is required 27 28. Which mineral ion is essential for chlorophyll formation? a Nitrate b Calcium c Magnesium 28 29. Which food test uses Benedict’s solution? a Starch b Protein c Reducing sugar 29 30. Which force opposes motion between two surfaces? a Tension b Friction c Air resistance

Combined Science quiz

Froggy Jumps

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Combined Science quizVersión en línea

por theva valu

1. Which characteristic of living organisms directly depends on metabolic reactions releasing energy?

2. Which structure is present in plant cells but absent in animal cells?

3. A cell placed in a concentrated salt solution shrinks. What is the main reason?

4. Diffusion rate increases when:

5. Which statement about enzymes is correct?

6. Denaturation of enzymes occurs because:

7. Which factor does NOT directly affect photosynthesis?

8. Which structure transports sucrose in plants?

9. Which is the correct order of human digestion?

10. Which nutrient provides the highest energy per gram?

11. Which describes an element?

12. What is the mass number of an atom?

14. Which is a property of transition metals?

15. Which is a trend across Period 3 from left to right?

16. A resultant force acts on an object. Which must occur?

17. A car accelerates from 10 m/s to 20 m/s in 5 s. What is the acceleration?

18. A train travels 150 km in 2.5 hours. What is the average speed?

19. Which is a vector quantity?

20. Energy cannot be:

21. Which process converts chemical energy into kinetic energy in the human body?

22. Which equation is correct for kinetic energy?

23. Work done is defined as:

24. What is the unit of power?

25. A 50 N force moves an object 3 m. Work done = ?

26. Which part of the cell controls cell division?

27. In active transport:

28. Which mineral ion is essential for chlorophyll formation?

29. Which food test uses Benedict’s solution?

30. Which force opposes motion between two surfaces?