Quiz beeeeeeeeeeeeeeeeeeeeeeeeeeeeeee.pptx

science

1. 1. What is the main function of red blood cells? A) To fight infection B) To digest food C) To clot blood D) To carry oxygen

2. D. To carry oxygen

3. 2. Which is TRUE about the number of chromosomes in humans? A)46 pairs, 23 total B)23 pairs, 46 total C)46 pairs, 46 total D)23 pairs, 23 total

4. B)23 pairs, 46 total

5. 3. Which blood cell is responsible for blood clotting? Platelet B) red blood cell C) white blood cell D) hemoglobin

6. A) platelet

7. 4. What is the genetic makeup of an organism called? A) Trait B) Allele C) Phenotype D) Genotype

8. D. genotype

9. 5 . A flap tissue that prevents the backflow of blood between the atria and the ventricle. A) Valve B) Artery C) Epiglottis D) Vein

10. C. Epiglottis

11. 6. What is most likely consequence for a species if it cannot adapt to a sudden change in its environment? A) Extinction of the species B) Rapid reproduction C) Migration to a new habitat D) Evolution into new species

12. A) Extinction of the species

13. 7. Which type of bond involves the transfer of electrons from one atom to another? a) Covalent bond b) Ionic bond c) Hydrogen bond d) Metallic bond

14. B. Ionic bond

15. 8. Elements on the RIGHT side of the periodic table will most likely to form: Positive ions Neutral ions Anions Cations

16. C. Anions

17. 9. Suppose the mother is pregnant, what is the chance or percentage that her baby is a girl? A) 25 % B) 50 % C) 75 % D) 100 %

18. B. 50 %

19. 10. What happens to the electron in an atom when it absorbs protons of light? A) The electron will lose energy. B) The electron will be attracted to the neutrons in the nucleus. C) The electron will “jump up” to a higher energy state D) The electron will “jump down” to a lower energy state.

20. C) The electron will “jump up” to a higher energy state

21. 11. Which statement is NOT true according to Bohr’s model of the atom? Electron’s path is not known exactly Electrons orbit the nucleus Electrons exist in energy level Electrons cannot be between energy levels.

22. A) Electron’s path is not known exactly

23. 12. Maria is looking for an ingredient in making vinegar, what organic compound Maria needs? Acetic acid Formaldehyde Methyl Alcohol D) Acetone

24. A) Acetic acid

25. 13. Which of the following units is used in expressing the amount of substance in terms of the number of particles? A) Liter B) Gram C) Celsius D) Mole

26. D) Mole

27. 14. Calcium has an atomic number of 20. A calcium atom has an electronic configuration of: A) 1s2 2s2 2p6 3s2 3p6 4s2 B) 1s2 2s2 2p6 3s2 3p6 3d2 1s2 2s2 2p6 3s2 3p6 1s2 1p6 2s2 2p6 3s2 3p2

28. A)1s2 2s2 2p6 3s2 3p6 4s2

29. 15. Suppose you are preparing a 300-g fruit salad that consists of 40% mixed fruits, 25% yogurt, 20% nuts, and 15% honey. How much yogurt will you use? 60 g yogurt B) 75 g yogurt C) 70 g yogurt D) 80 g yogurt

30. B) 75 g yogurt

31. 16. Who introduced mole concept in the field of chemistry? A) Hofmann B) Ostwald C) Galileo D) Avogadro

32. B) Ostwald

33. 17. In _________ atomic model, negative electrons orbit positively charges nucleus. Dalton’s Thompon’s Rutherford’s Democritus’s

34. C) Rutherford’s

35. 18. Why can metals be hammered without breaking? A) They are ductile. B) They are malleable. C) They are not brittle. D) Their particles are strong.

36. B) They are malleable.

37. 19. A baby boy gets his Y chromosome __________ A) From his father. B) From his mother C) Both from his parents. D) Either from his mother or father.

38. A) From his father.

39. 20. What group of elements satisfies the octet rule without forming compounds? A) Halogen B) Alkali metal C) Noble gas D) Alkaline-earth metals

40. C) Noble gas