Bi - and De - Prefix

1. An event that happens 2 times a year.
2. A mode of transportation you ride that has 2 wheels
4. When something gets smaller and shrinks down because the air goes out of it
5. When you totally take a structure down and clear the way for something new.
7. A scientist who studies animals and living things
8. A line that cuts things in half. It cuts things into two equal parts
9. When something breaks down in nature. It could be food left out too long, or leaves on the forest floor, for example.
11. What happens to the freezer when you unplug it and the ice melts away.
12. to make something smaller or less, or to become smaller or less

1. Something you hold up to both of your eyes and it helps you see things that are far away
3. to break down into smaller parts, especially as something decays. You could also use this word in math as you take numbers apart.
6. Something that happens every 2 weeks.
7. Something that has 2 colors on it.
10. to figure out or understand something that is hidden, coded, or not easy to read.