Activity Three: Thermoregulatory Property of Water
Concept: How Thermoregulatory Property
of Water Works
Objectives:
1.
Determine the properties of water as illustrated on the result
of the activities; and
2. Analyze
the implications and significance of the identified properties of water in living things.
Materials:
Iron stand and iron ring, alcohol lamp and match, detergent, non- waxed paper bowl, water
Procedure:
- Assemble the iron ring on the iron stand about 4-5 inches high.
- Place the alcohol lamp on the base of the iron stand and then,
the paper bowl on top of the iron ring.
- Adjust the height of the iron ring such that the paper bowl
on top of it is a few inches above the alcohol lamp.
- Pour about one-half cup of water in the paper bowl.
- Formulate a problem and a hypothesis based on this situation.
(Do this before performing the activity.)
- Light the alcohol lamp.
- Write your observations.
- List down the activity- related property of water and relate
its importance to living things.
Activity Four: Disturbing Surface Tension of Water
Concept: Role of Water Surface Tension
in Living Things
Objective:
This activity should enable you to relate water surface tension to the role of water in living things.
Materials:
Petri
dish, water, toothpick, soap or shampoo, loose powder
(Read the procedure first. Formulate a problem and hypothesis before performing the activity.)
Procedure:
- Clean the petri dish using soap and water. Rinse thoroughly.
- Place a small amount of water in it.
- Scatter loose powder over the surface of the water.
- Dip the broader end of the toothpick in either liquid soap
or shampoo.
- Dip the toothpick at the center of the petri dish with water.
- Write down your observations and conclusions.
Name: _________________________ Date: ____________________
Subject and Section: ______________ Rating: ___________________
Activity Three Action Sheet: Thermoregulatory Property of Water
Problem:
Hypothesis:
Observations:
Conclusions:
Critical Thinking: (Enumerate the activity-related properties of water and relate their importance to living
things.)
Name: _________________________ Date: ____________________
Subject and Section: ______________ Rating: ___________________
Activity
Four Action Sheet: Disturbing Surface Tension of Water
Problem:
Hypothesis:
Observations:
Conclusions: