Does It Make Sense to Say That a Textbook Is

question 64

Multiple Choice

Does it make sense to say that a textbook is about 99.9 percent empty space?

• A)No.A textbook is a solid and thus is quite dense.Therefore it is not 99.9 percent empty space.
• B)No.Only gases are considered to be 99.9 percent empty space.Liquids and solids are not.
• C)Yes.A textbook like all material things is made up of atoms,which are considered to be 99.9 percent empty space.
• D)No.A textbook could only be considered to be 99.9 percent empty space if it were combusted.

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Definitions:

Photodynamic Therapy

A treatment that uses special drugs, known as photosensitizing agents, alongside light to kill cancer cells.

Chemical

A substance with a distinct molecular composition that is produced by or used in a chemical process.

Carcinomas

A type of cancer that begins in the skin or the tissue lining organs, such as the liver or kidneys.

Epithelial Tissues

Layers of cells that line or cover the body surfaces, both internal and external, playing roles in protection, secretion, and absorption.