Fill in the blanks with the words in the word bank on the right. Use each word only once.
1. Biomass is any
that was alive a short time ago.
2. Biomass is a
energy source, because we can always grow more plants.
most biomass to make heat.
4. We burn garbage in a
plant to make
5. When biomass rots, it forms a
that we can use for energy.
6. Biomass can be turned into a liquid fuel like gasoline called
7. Most of the biomass we use is
energy from the sun in their roots and leaves.