Lava filter

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/lava-filter

1. What is the thermal stability?
2. What is the related technologies?
3. What is a lava filter and how does it clean air?
4. Why do lava filters need to be made of ceramic like cordierite or silicon carbide?

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the thermal stability?Operates effectively in high-temperature exhaust gas streams, often exceeding 600°C (1112°F)
2. What is the related technologies?Diesel Particulate Filters (DPFs), catalytic converters, industrial baghouses
3. What is a lava filter and how does it clean air?Lava filters are special ceramic blocks with tiny holes that trap dust and smoke from factories. They let gas flow through the holes while catching tiny particles.
4. Why do lava filters need to be made of ceramic like cordierite or silicon carbide?Ceramic can stay strong even when very hot or when the gas is corrosive. It also can survive sudden temperature changes.

Monolithic Structure: A single, solid block of material, often with internal channels, as seen in ceramic filters.
Particulate Matter (PM): Microscopic solid or liquid particles suspended in the atmosphere, posing health and environmental risks.
Pressure Drop: The reduction in pressure that occurs as a fluid flows through a filter or other resistance.