Amoeba sisters: Properties of Water

Because Oxygen hogs the electrons it has a slightly _________ charge.

• Positive

• Negative

The partially positive Hydrogen of one water molecule is attracted to the partially negative Oxygen of another water molecule. This forms a(n) _____________.

• Covalent Bond

• Ionic Bond

• Hydrogen Bond

Hydrogen bonds between water molecules create a force called cohesion. What is the definition of COHESION?

• Water molecules sticking to each other.

• The upward motion of water against gravity

• Water molecules sticking to surfaces.

• The ability of water to dissolve other substances

Cohesion between water molecules contributes to __________ which allows the molecules to stick together and resist outside forces.

• Universal solvent

• Adhesion

• Polarity

• Surface Tension

Because water is an excellent SOLVENT, it can...

• ...dissolve many other substances.

• ...be dissolved by other substances.

When water freezes into a solid it expands and:

• becomes more dense

• becomes less denses

• does not change density

Why is it important for lakes and ponds that ice (frozen water) becomes less dense and floats?

• So living things can survive beneath the ice.  

• So ice hockey can be played in the cold winter months.  

Water has a high specific heat which means that its temperature remains fairly _______.

• stable

• low

• high

Why is evaporative cooling important to both plants and animals?

• Heat can make plants and animals uncomfortable; but will not cause any damage

• High heat can help enzymes do their job better 

• Heat can be very dangerous to many process that are crucial to life

• Heat is harmful to animals only 

What substances will dissolve in water?

• polar

• nonpolar