What kinds of things do you wonder about soil temperatures?

Here are some of the questions Journey North students have come up with:

• What do you think the temperature is underground where our bulbs are?
• Is the soil temperature the same as the air temperature?
• Will the underground temperature change during a 24-hour period?
• Is it cold deeper in the ground?
• As you dig deeper does it get warmer?
• Why does the soil still feel so cold?
• What factors affect soil temperatures?
• Does sunshine change the soil temperature underground?
• Do soil temperatures affect how fast tulips grow?
• How hot or cold is it a mile down? In the center of the earth?
• Are soil temperatures the same in different microclimates?
• Are soil temperatures of bare ground and insulated ground different? Does the amount of insulation matter?
• In the winter is the ground warmer than the air?
• How does a pile of snow affect the soil temperature under it?
• Is wet soil colder than dry soil?
• Do plants change the temperature of the soil?
• How warm does the soil have to be for tulips to grow?