Two-stroke engine

High school (ages 12+)
Transportation

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/two-stroke-engine

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 a two-stroke engine and how does it work?A two-stroke engine completes the intake, compression, power, and exhaust cycle in just two piston movements, making it fast and lightweight.
2. Why do two-stroke engines have more power than four-stroke engines?Because the power stroke happens twice as often at the same speed, giving a higher power-to-weight ratio.

Bottom Dead Center (BDC): The lowest point a piston reaches in its cylinder during its stroke.
Top Dead Center (TDC): The highest point a piston reaches in its cylinder during its stroke.
Scavenging: The process where the incoming fuel-air mixture helps expel exhaust gases from the cylinder.