Plates at our planet’s surface move because of the intense heat in the Earth’s core that causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down. As the cooled material sinks down, it is warmed and rises again.
Demand curve is the ratio of demand (of whatever) to its price. It indicates the inverse relationship of what's demanded and the price
Answer:
1.B 2.A,C,D
Explanation:
A mineral is a naturally occurring, inorganic compound with a unique chemical structure and physical properties. A rock is a solid, stony mass composed of a combination of minerals or other organic compounds. For example, quartz and feldspars are minerals, but when formed together, they make a rock, granite.
Answer: Africa includes the rich source of water drainage in the form of rivers.
Explanation:
The course travelled by the major rivers in Africa are as follows:
1. Congo: Center to north and further to the Western region finally drains into the Atlantic Ocean.
2. Nile: Northeastern part to the North and then finally to the Mediterranean Sea.
3. Zambezi: South eastern to Indian Ocean.
4. Niger: West to the Guinea Gulf.
