To Reduce the Amount of Infections Spread from One Child

question 4

Multiple Choice

To reduce the amount of infections spread from one child to another,children should wash their hands:

• A)before eating.
• B)after using the toilet.
• C)upon entering the classroom.
• D)all of the above

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Definitions:

Atomic Number

The atomic number is equal to the number of protons (positively charged particles) in the nucleus of an atom.

Element

A pure chemical substance consisting of one type of atom distinguished by its atomic number.

Nucleus

The central and most important part of an atom, containing protons and neutrons and almost all of its mass.

Matter

Anything that occupies space and has mass, composed of atoms or molecules and is the substance that makes up the physical universe.