its b because the perenpathy is 24
Answer:
<u>Oxygen</u> is the most abundant non-metal found in the Earth's crust.
Explanation:
The most abundant of the other nonmetals in the Earth's crust is oxygen which is the single most abundant element in the Earth's crust.
Water is also made up of the two nonmetals oxygen and hydrogen in which we found Oxygen the most abundant.
Answer:
sea trade
Explanation:
The control of sea trade, the chief source of Portuguese wealth in the East, was assured by the defeat of Muslim naval forces off Diu in 1509.
Portugal's main natural resources include fish, forests (cork), iron ore, copper, zinc, tin, tungsten, silver, gold, uranium, marble, clay, gypsum, salt, arable land and hydropower.
Basically the Earth is layered because of gravity. The earth formed in the molten state. The liquid iron which is very dense fell to the center. The rest of the earth is made up of silicate materials with SiO2 being the main component.
hope this helps!
