бекишева 2 семак / table 2 griha

In your own words, describe nanotechnology.

Nanotechnology is the science of manipulating atoms and molecules (nanoparticles) to create materials or solve problems. It involves working at the nanoscale (1–100 nanometers), where materials often exhibit unique properties.

How big is a nanoparticle?

A nanoparticle is between 1 and 100 nanometers in size (1 nm = 0.000000001 meters or 10⁻⁹ meters). For comparison, a nanometer to a meter is like a marble to the Earth.

Name two nanoparticles.

1. Carbon nanotubes 2. Graphite molecules (used to create nanotubes)

Give examples of products that contain nanoparticles.

1. Sunscreen (nanoparticles make it rub on clear) 2. Paint 3. Inkjet paper

How can particles at a nanoscale be different from the same material at a larger scale?

At the nanoscale, materials may have different colors, strength, or other properties. For example, carbon nanotubes are stronger than steel but much lighter.

How may nanotechnology be used in the future?

Potential uses: - Tiny computers (smaller than a pinhead) - Medical "nanobots" for surgery or killing cancer cells - Cleaning ocean pollution

What concerns do some people have about using nanoparticles in products?

1. Health risks: Nanoparticles might bypass the immune system and harm cells. 2. Environmental risks: Uncontrolled release could damage ecosystems.

Briefly describe below the main ideas in this article:

1. Precision: Answers directly reference the article’s examples (e.g., carbon nanotubes, sunscreen).

2. Paraphrasing: Descriptions are in student-friendly language without copying text verbatim.

3. Future Uses/Criticisms: Aligns with the article’s predictions and concerns.

4. Main Idea Summary: Captures the article’s focus on definition, applications, and risks.