Natural vs. Synthetic

What is the main difference between natural and synthetic chemicals according to the passage?

• Their origin and how they are made

• Their level of safety

• Their chemical composition

• Their environmental impact

Which of the following is an example of a synthetic chemical made from a natural resource?

• Nylon

• Snake venom

• Botulinum

• Kelp

Why might humans produce synthetic versions of natural chemicals?

• Natural versions are hard to obtain in large quantities

• Synthetic versions are always safer

• Natural versions are always more expensive

• Synthetic versions are more environmentally friendly

What was the consequence of using DDT as mentioned in the passage?

• It harmed birds and other animals in the ecosystem

• It improved crop yields significantly

• It was beneficial for human health

• It was a safe pesticide with no side effects

According to the passage, what is a potential risk of using fertilizers?

• Causing excessive growth of algae in water bodies

• Improving plant growth too much

• Being too expensive for farmers

• Not being effective in promoting plant growth