Crude oil and saw: what they have in common

1. Step 1. Crude oil — is material for — Petrol. Petrol is made from crude oil.
2. Step 2. Petrol — is used in — Internal combustion engine. The fuel of a petrol engine.
3. Step 3. Internal combustion engine — is part of — Chainsaw. A two-stroke engine.
4. Step 4. Chainsaw — evolved from — Saw. A mechanized saw.

Open Evothings