Explain what happens to energy that is not used? 1 Unused energy is destroyed. 2 Lost energy is transferred as heat energy. 3 Unused energy is recycled. 4 Lost energy disappears. please help!

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

Select the word from the list that best fits the definition the temperature to which air must cool to be saturated