Assignment 2-2: Properties of Water
EQ: What properties make water so essential to life?
OBJECTIVES:
-Discuss the special properties of water that contribute to Earth's suitability as an environment for life.
KEY TERMS: hydrogen bond, cohesion, adhesion, solution, solvent, solute, acid, base, pH
1. Define the Key Terms listed above.
READ pages 42-43 in your text.
2. Complete the sentence: Unlike most substances, water ________ when it freezes.
3. Predict how the property of water mentioned above helps sustain life in ponds and lakes.
4. Draw a molecule of water, labeling the hydrogen atoms, the oxygen atoms, the negative side, and the positive side. Make it colorful! (See figure 2.1 on page 42)
5. Summarize what it means for a water molecule to be polar.
6. Explain how hydrogen bonding holds water molecules to one another.
7. Demonstrations:
For each of the water demonstrations do the following:
For each of the water demonstrations do the following:
- Draw a picture/diagram of the experimental setup.
- Explain what is happening. Use the words cohesion, polarity, adhesion, hydrogen bonding, and/or Capillary Action
Water Bending
Drops on a Penny
Capillary Action
8. Determine which water stations best demonstrates cohesion. Explain your answer.
9. Explain how water's high specific heat is very important in cells.
10. Infer how the oceans help keep temperatures on the Earth suitable for life.
READ Pages 44-45 in your text.
11. State the kinds of molecules that dissolve easily in water and list 2 examples found in your blood.
12. State the kinds of molecules that do not dissolve easily in water and list 2 examples.
13. Create a chart that compares acids and bases.
10. Infer how the oceans help keep temperatures on the Earth suitable for life.
READ Pages 44-45 in your text.
11. State the kinds of molecules that dissolve easily in water and list 2 examples found in your blood.
12. State the kinds of molecules that do not dissolve easily in water and list 2 examples.
13. Create a chart that compares acids and bases.
