Q: Glasses are mixtures of oxides, the main component of which is silica (sio2). silica is called the glass former, while additives are referred to as this? Choices: - natural modifiers - addition modifiers - glass actors - glass modifiers A:
glass modifiers

Q: Burning fossil fuels produces air pollution and what? Choices: - oxygen - liquid dioxide - acid rain - carbon dioxide A:
carbon dioxide

Q: Q: What do you call any force that makes something move in a circle? Choices: - cyclical - tangential force - momentum - centripetal force A:
A: centripetal force

Question: Q: Gametes are products through meiosis in which organs? Choices: - hormones - cones - kidneys - gonads A:
Answer: gonads

*Question*
Q: When flagellated sperm must swim to the egg, sexual reproduction requires the presence of what substance? Choices: - air - nitrogen - sunshine - water A:
**Answer**
water

*Question*
Q: Nutrition and diet affect your metabolism. more energy is required to break down fats and proteins than this? Choices: - vitamins - electrolytes - minerals - carbohydrates A:
**Answer**
carbohydrates