1. What is the main purpose of food preservatives?
A)Change the color
B)Extend shelf life
C)Increase weight
D)Add flavor
2. Which of these is a common natural food coloring?
A)Gold
B)Beet juice
C)Plastic
D)Nylon
3. What do antioxidants prevent in food?
A)Boiling
B)Freezing
C)Oxidation
D)Melting
4. Which substance is commonly used to sweeten food?
A)Oxygen
B)Iron
C)Copper
D)Sucrose
5. What is added to food to improve texture?
A)Gas
B)Thickeners
C)Acid
D)Metals
6. Which acid is often used as a preservative in soft drinks?
A)Gold acid
B)Lead acid
C)Citric acid
D)Iron acid
7. What do emulsifiers do in processed food?
A)Mix oil and water
B)Remove color
C)Increase heat
D)Make it spicy
8. Which of these is a common flavor enhancer?
A)MSG
B)Rubber
C)Plastic
D)Lead
9. Why are food dyes added to products?
A)Add vitamins
B)Kill bacteria
C)Enhance appearance
D)Increase price
10. What type of additive prevents clumping?
A)Dye
B)Sweetener
C)Anti-caking agent
D)Preservative
11. Which chemical is often used as a salt preservative?
A)Neon
B)Argon
C)Sodium chloride
D)Gold
12. What is the role of a stabilizer in food?
A)Remove water
B)Increase weight
C)Change color
D)Maintain consistency
13. Which ingredient is commonly used to give food a yellow color?
A)Iron
B)Copper
C)Lead
D)Turmeric
14. What are E-numbers used for in food labels?
A)Identify additives
B)Weight info
C)Price code
D)Batch date
15. What does a humectant do in food products?
A)Add color
B)Retain moisture
C)Kill bacteria
D)Improve scent
16. What is the most abundant element in the universe?
A)Carbon
B)Oxygen
C)Hydrogen
D)Helium
17. Which element makes up the second largest portion of the universe?
A)Iron
B)Helium
C)Nitrogen
D)Oxygen
18. What is the most abundant element in Earth's crust?
A)Aluminum
B)Oxygen
C)Iron
D)Silicon
19. Which element is the second most common in Earth's crust?
A)Gold
B)Hydrogen
C)Carbon
D)Silicon
20. Which element is the most abundant in Earth's atmosphere?
A)Argon
B)Oxygen
C)Nitrogen
D)Carbon Dioxide
21. What metal is the most abundant in Earth's crust?
A)Silver
B)Aluminum
C)Gold
D)Copper
22. Which element is commonly believed to form the Earth's core?
A)Calcium
B)Lead
C)Magnesium
D)Iron
23. In the human body, which element is the most abundant by mass?
A)Oxygen
B)Hydrogen
C)Carbon
D)Nitrogen
24. Which gas is the second most abundant in our atmosphere?
A)Methane
B)Oxygen
C)Helium
D)Nitrogen
25. Which element is the primary component of organic life?
A)Oxygen
B)Carbon
C)Sulfur
D)Silicon
26. What is the third most abundant element in the universe?
A)Nitrogen
B)Carbon
C)Neon
D)Oxygen
27. Which element is highly abundant in Earth's oceans?
A)Gold
B)Iron
C)Mercury
D)Chlorine
28. Which element is essential for bone structure and is common in the crust?
A)Potassium
B)Sodium
C)Zinc
D)Calcium
29. Which element is the most abundant noble gas in the atmosphere?
A)Krypton
B)Argon
C)Helium
D)Neon
30. Which element makes up the bulk of the Sun's mass?
A)Iron
B)Oxygen
C)Hydrogen
D)Carbon
31. What is the primary purpose of adding chlorine to drinking water?
A)To remove lead
B)To add flavor
C)To soften water
D)To kill pathogens
32. Which chemical is commonly used to disinfect water?
A)Chlorine
B)Sodium
C)Iron
D)Oxygen
33. What is the main danger of untreated drinking water?
A)Oxygen levels
B)Color
C)Taste
D)Microbes/Bacteria
34. What does chlorination help prevent in water supply?
A)Drought
B)Global warming
C)Rust
D)Waterborne diseases
35. What is the most common form of chlorine added to water systems?
A)Chlorine solid
B)Chlorine gas
C)Chlorine liquid
D)Chlorine salt
36. Water treatment plants often use a process to remove large particles called:
A)Freezing
B)Boiling
C)Sedimentation
D)Evaporation
37. Why is fluoride sometimes added to water supplies?
A)To prevent tooth decay
B)To stop corrosion
C)To kill algae
D)To clean pipes
38. What is the function of a filter in water treatment?
A)To increase pressure
B)To remove physical impurities
C)To add chemicals
D)To heat the water
39. Which of these is a byproduct of chlorination?
A)Clean sand
B)Pure oxygen
C)Sugar
D)Trihalomethanes
40. Chlorination is effective against which types of organisms?
A)Insects
B)Bacteria and viruses
C)Plants
D)Only fish
Answer Key
1-B
2-B
3-C
4-D
5-B
6-C
7-A
8-A
9-C
10-C
11-C
12-D
13-D
14-A
15-B
16-C
17-B
18-B
19-D
20-C
21-B
22-D
23-A
24-B
25-B
26-C
27-D
28-D
29-B
30-C
31-D
32-A
33-D
34-D
35-B
36-C
37-A
38-B
39-D
40-B