Though aluminum is more reactive than iron, an aluminum oxide layer forms upon exposure to air which protects the remaining aluminum. List two strategic metals and two countries where they are commonly obtained. Give examples of each. Ecosystems can be divided into producers of energy and consumers of energy. List, describe, and give examples of three types of consumers.
Most plants are producers.
Give an example of a plant which is not a producer. If the plant is green, it is a producer. Describe two ways that mankind has contributed to the current period of plant and animal extinction. Write down the three basic subatomic particles, their mass, their charge, and where they are found in the atom. Name two modern day descendants of the cathode ray tube.