Question

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Answer 1

Answer:

13-An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. ... Ecosystems can be very large or very small.

15-Earth's interior is generally divided into three major layers: the crust, the mantle, and the core. ... The outer core is molten and liquid iron and nickel, while the inner core is solid and much more dense than either iron or nickel at the surface.

Answer 2

Explanation:

Ans13 :-An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. ... Ecosystems can be very large or very small.

Ans 14:-The basic elements of natural environmental are atmosphere, litho sphere, biosphere, and hydrosphere

Ans 15Earth's interior is generally divided into three major layers: the crust, the mantle, and the core. The hard, brittle crust extends from Earth's surface to the so-called Mohorovicic discontinuity, nicknamed the Moho. ... Beneath the Moho is the mantle, the viscous layer that makes up more than half of Earth's volume.

Ans16 :-A river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water

Ans17:-Hot lava cools down to form igneous rocks. ... When igneous and sedimentary rocks are subjected to great heat and pressure, they change into metamorphic rocks. Metamorphic rocks under heat and pressure breakdown and form hot lava. This hot magma then again cools down and forms igneous rocks and the cycle is repeated