Question 9 which statement is true: the atomic mass of an atom is equal to the number of neutrons in the nucleus the atomic number of an atom is equal to the number of neutrons in its nucleus the atomic weight of an atom is the sum of neutrons plus electrons the atomic weight of an atom is the sum of its protons and neutrons

Match your vocabulary word to its definition. 1. emigration 2. immigration 3. migration 4. overpopulation 5. sustainable development 6. under population 7. unsustainable development 8. urbanization the movement from one place to another the number of people exceeds the available natural resources in an area leaving one's homeland to settle in a new place the increase in the population of a city the movement of people to a new country the ability to meet current needs without reducing the ability to meet future needs resources being used up at a faster rate than they can be replenished birth rate insufficient to replace the existing population

Which soil layers comprise the topsoil? o horizon a horizon b horizon c horizon

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire