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

oxygen

hydrogen

phosphorus

nitrogen

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

hydrogen

negative (-)

positive (+)

oxygen

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