Which statement describes how heat is transferred by convection? Air molecules touch the warm ground, heating them up.

Warm air rises and takes heat with it; eventually it cools and sinks.

Sunlight travels through space without the aid of fluids or solids.

Land and ocean absorb and re-emit heat from the sun.

Why does the united states constitution require that a national census be taken every ten years?

Which of the following is an example of the treatment technique for ocd called exposure and response prevention (erp)? a. callie has a hoarding compulsion. she becomes anxious whenever she has to throw something away; she even keeps stuff that she doesn't need and will never use. her therapist has arranged for callie's unnecessary belongings to be discarded of when she is away from home. b. carrie has an obsessive fear of contamination which has led to compulsive hand washing. her therapist is treating her by making her touch dirty laundry but not allowing her to wash her hands following for increasingly longer periods of time. c. kelly has religious obsessions. she feels that if she doesn't read biblical passages every hour of the day, she will do something evil. her therapist is treating her by having her attend religious services more frequently so that good thoughts will replace the bad ones. d. kerry has an obsessive fear of contamination which has led to compulsive hand washing rituals. her therapist is treating her by forcing her to wash her hands repeatedly, even when she doesn't feel anxious.

Why would someone who is studying the history or culture of this time. find this text interesting important or useful?