Filtration

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/filtration

1. What is filtration and how does it work like a sieve?
2. Why do we use different filter materials like sand, cellulose, or synthetic polymers?

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 filtration and how does it work like a sieve?Filtration is a process that uses a porous material to keep solid particles while letting liquid or gas flow through. It works like a sieve that catches big particles and lets the fluid pass.
2. Why do we use different filter materials like sand, cellulose, or synthetic polymers?Different materials are chosen based on what they need to filter, how hot they will get, and how they react with the fluid. Some are natural, like sand, while others are made in labs to fit specific jobs.

Filter Medium: The porous material that performs the separation in a filtration system, characterized by pore size and structure.
Pore Size Distribution: The range of pore sizes present in a filter medium, influencing the size of particles that can be retained.
Nanofiltration: A membrane filtration process that removes dissolved salts and multivalent ions, as well as larger molecules.