Science 3rd Grade

This is the Chemical formula for Oxygen.

• H2O

• HO2

• O2

• 2O

Things that are made of atoms.

• Oranges

• Ice cubes

• Helium inside the balloon

• All of them

The combination of different kinds of atoms form:

• Houses

• Cars

• Ions

• Elements

What does NaCl refers to?

• Oxygen

• Sodium

• Sodium chloride

• Salts

The states of matter are:

• Water, soda and vinegar.

• Liquid, solid, gas.

• Ice cube, car, sodium.

• Paper, rubber, glass.

This is an example of a good conductor.

• Rubber

• Wood

• Paper

• Metals

An insulator is a material or object that permits an electric current to flow easily.

• Yes, that's correct.

• No, it's not real.

• I don't know.

• Let's forget it.

Electricity flows:

• in an open circle

• in a big circle

• in a closed circle

• in an enormous circle

A molecule is:

• the most important part of a substance

• the biggest part of a substance

• the smallest part of a substance

• the second part of a substance

The rainbow contains:

• seven days

• seven months

• seven hours

• seven colors