L.18.12 - lvl. 1 - Properties of Water

Multiple Choice

Water is necessary for ALL living things

• true

• false

Multiple Choice

What two elements make up water?

• helium and oxygen

• hydrogen and oxygen

• hydrogen and carbon

• oxygen and carbon

Labelling

Label the atoms that make up one water molecule

Drag labels to their correct position on the image

nitrogen

hydrogen

phosphorus

oxygen

carbon

Multiple Choice

A water molecule is a _______ since the negative end of one water molecule is attracted to the positive end of another water molecule.

• polar molecule

• sustain life

• surface tension

• specific heat

Multiple Choice

In a water molecule, the oxygen atom has a small...

• negative charge

• neutral charge

• positve charge

Labelling

Shown here is a water molecule. Inside the red circle drag the name of the element. Next to the red circle label the charge.

Drag labels to their correct position on the image

negative (-)

positive (+)

hydrogen

oxygen

Labelling

Shown here is a water molecule. Inside the white circle drag the name of the element. Next to the white circle label the charge.

Drag labels to their correct position on the image

negative (-)

oxygen

hydrogen

positive (+)

Multiple Choice

Elements combine to form __________.

• molecules

• atoms
• positive ions
• negative ions

Multiple Choice

Which end of the water molecule has a slightly positive charge?

• the oxygen end
• the hydrogen end
• both ends are slightly positive
• neither end is positive

Multiple Choice

How many hydrogen atoms are in a water molecule?

(HINT: H₂0)

• 5

• 1

• 2

• 0

Multiple Choice

Why don't water molecules just break apart into hydrogen and oxygen atoms?

• covalent bonds are very strong and they hold hydrogen and oxygen together

• covalent bonds are very weak and they hold hydrogen and oxygen together

• hydrogen bonds are very strong and they hold hydrogen and oxygen together

• hydrogen bonds are very weak and they hold hydrogen and oxygen together