Flatworm get most of their oxygen through diffusion.
Boiling point. If you boil water it changes from a liquid to a gas, which is a physical change. The rest are chemical properties because the chemical make up of an object changes.
1. Make an observation
2. Form a question
3. For a hypothesis
4. Conduct an experiment
5. anazlyze the data and draw a conclusion
Cows because theyer and manewer contains methane witch can power generators