frost line in a sentence

Examples

1. They overwinter below the frost line and return to the surface in the spring.
2. The depth of frost lines vary from region to region.
3. The frost line does not plunge to maximum depth as soon as winter starts.
4. Kepler-9b and 9c are thought to have formed beyond the " frost line ".
5. In the USA frost lines can range from around 20 " to 40 + ".
6. To construct a rubble trench foundation a narrow trench is dug down below the frost line.
7. They burrow beneath the frost line or hang out in the middle of your compost pile.
8. Frost line depths vary from region to region.
9. "They would freeze if their burrows were not below the frost line, " the scientist said.
10. I understand that having the pipes below frost line, has an effect of insulating it from cold.