EVERYDAY SCIENCE

Detailed explanation-1: -Earth has three layers: the crust, the mantle, and the core. The crust is made of solid rocks and minerals. Beneath the crust is the mantle, which is also mostly solid rocks and minerals, but punctuated by malleable areas of semi-solid magma. At the center of the Earth is a hot, dense metal core.

Detailed explanation-2: -Oxygen, silicon, iron and aluminum are the most abundant elements in the Earth’s crust, accounting for 88.1% of its mass. No-one has ever journeyed to the center of the Earth.

Detailed explanation-3: -Earth is made mostly of silicate rock in its crust and mantle, iron-nickel metal in the core. As will be explained, this is like some other planets–but very unlike others.

Detailed explanation-4: -The Earth is a watery place. But just how much water exists on, in, and above our planet? About 71 percent of the Earth’s surface is water-covered, and the oceans hold about 96.5 percent of all Earth’s water.