CLINCHER ROUND (Science Quiz Bee 2023)

1. 1. In mining fields, drills are used to remove rocks to search for the valuable metal ores below. The intense drilling generates a high amount of frictional heat. Which physical properties should be considered when we choose a material to make the drills?

• A. strength, melting point, transparency

• B. strength, electrical conductivity, thermal conductivity

• C. hardness, strength, melting point

• D. hardness, electrical conductivity, boiling point

2. 2. Which of the following statements best describes osmosis?

• A. The movement of water through a permeable membrane

• B. The movement of salts through a semipermeable membrane

• C. The movement of water through a semipermeable membrane

• D. The pressure exerted by water through a semipermeable membrane

3. 3. Which of the following is most accurate about the pasteurization of milk?

• A. It lowers the milk’s pH

• B. It makes milk taste better

• C. It kills all bacteria by sterilizing the milk 

  
  

• D. It reduces the population of bacteria by heating but not boiling the milk

4. 4. The diagram below shows Cells A, B, and C. Which of the following statements best describes Cells A, B, and C?

• A. All the cells above have a cell wall

• B. All the cells above can make their own food

• C. All the cells above are taken from at least two different organisms

• D. All the cells above are taken from different parts of the same organism

5. Study the circuit below.

After one of the bulbs had blown, all the other bulbs did not light up. Which bulb had blown? 

• A. A

• B. B

• C. C

• D. D