How Does Soap Clean? | A2 ESL Science Reading Passage

Use this A2-B1 ESL science reading passage to learn how soap cleans. It includes key vocabulary, reading comprehension questions, and answers for English learners.

Soap helps water lift oil and dirt from surfaces.

Reading Level

A2-B1

Word Count

190 words

Reading Passage

Soap is a common tool for cleaning. People use it to wash dishes, clothes, tables, and many other things. Soap works well because it helps water remove dirt and oil.

Water can wash away many things, but it has trouble with oil and grease. Oil does not mix easily with water. If you put oily dirt on a plate and rinse it with only water, some oil may stay on the surface.

Soap helps because it is made of tiny molecules. A soap molecule has two useful ends. One end likes water. The other end likes oil and grease.

When soap touches oily dirt, the oil-loving ends attach to the oil. The water-loving ends stay near the water. Many soap molecules can surround small pieces of oil and dirt. This helps lift them away from the surface.

Then water can carry the soap, oil, and dirt away. This is why rinsing is important after using soap. The water removes the loose dirt and leaves the surface cleaner.

Soap may look simple, but it uses science every day. It connects oil and water long enough to help clean many things around us.

Soap molecules have one end that likes water and one end that likes oil.

Key Vocabulary

Word	Meaning	Example
soap	a cleaning material used with water	Soap helps water clean oily dirt.
oil	a slippery liquid that does not mix well with water	Oil can stay on a plate without soap.
molecule	a very small piece that makes up a substance	A soap molecule has two useful ends.
surface	the outside or top layer of something	Dirt can sit on a surface.
rinse	to wash something with clean water	Rinse the plate after using soap.

Reading Comprehension Questions

1. What does soap help water remove?
2. Why is oil hard to wash away with only water?
3. What are soap molecules like?
4. What do the oil-loving ends of soap molecules do?
5. Why is rinsing important after using soap?

Answers

1. Soap helps water remove dirt and oil.
2. Oil is hard to wash away because it does not mix easily with water.
3. Soap molecules have one end that likes water and one end that likes oil.
4. They attach to oil and grease.
5. Rinsing carries away the soap, oil, and dirt.

Short Summary

Soap cleans by helping water lift oil and dirt from surfaces, so they can be rinsed away.

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