Where are iron and aluminum often found?

Iron and Aluminum are often found in the EARTH'S CRUST

Explanation:

The Earth's crust is the thin outermost layer of the Earth.

The Earth's Crust is composed of elements and minerals such as Iron, Aluminum, Oxygen, Silicon, Potassium, e.t.c

The Earth's Crust is very essential and important because it is an area whereby minerals are exchanged and transferred between the Atmosphere, Hydrosphere and center or core of the Earth.

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

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