Explain why the magnifying glasses made from transparent materials?

The distinguishing feature of the magnifying glass is its structure—a bi-convex lens (one that is convex on both sides) situated in a frame and attached to a handle. The lens may be constructed of glass or plastic, and the handle of materials such as wood, plastic, and metal.

Magnifying glass and glass tumbler are the materials through which things can be seen. Hence, they both are transparent.

Explanation:

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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