Exercises 1. Answer the following questions.
(1) What are the three layers of the earth?
(ii) What is a rock?
(iii) Name three types of rocks.
(iv) How are extrusive and intrusive rocks formed
(v) What do you mean by a rock cycle?
(vi) What are the uses of rocks?
(vii) What are metamorphic rocks?​

Why is the price of rice so important? a. rice prices must be kept within reach of the poorest peopleb. rice prices must make a large profit or no one will grow itc. rice prices impact the cost of fruits and vegetables on neighboring farmsb. rice prices have no real importance other than to large corporations

How did geographic isolation affect the islands in the australasia ecozobne?

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