28. Nanotechnology: The Science of the Very Small
According to the essay, what is a nanometer?
- One-thousandth of a meter
- The thickness of a sheet of paper
- One-billionth of a meter
- The size of a cancer cell
The essay states that one way nanotechnology is used in medicine is to:
- Make smaller and faster smartphones
- Create stronger materials for airplanes
- Deliver drugs directly to cancer cells
- Develop better solar panels
Which of the following is NOT mentioned in the essay as a use of nanotechnology?
- Creating longer-lasting batteries
- Making fabrics that resist dirt
- Building larger and more powerful telescopes
- Improving the effectiveness of sunscreen
What is one challenge associated with nanotechnology mentioned in the essay?
- It is too expensive to be used in everyday products.
- It makes electronic devices too small to use easily.
- Its effects on health and the environment need more study.
- It cannot be used in the field of energy production.
The main idea of the essay is that nanotechnology:
- Is a dangerous new science that should be avoided.
- Is only useful in the fields of medicine and electronics.
- Involves very small things that can have a very large impact.
- Has been fully studied and is completely safe to use.