WLW Day 3: Thermal Properties of Water

Experiment # 2: Thermal Properties of Water

Materials Needed:

* 2 flat aluminum cake pans (disposable)
* sand
* thermometer
* a liter measure
* aluminum foil

Instructions:
* Punch holes in the bottom of one cake pan.
* Fill it with hot sand and cover with aluminum foil (shiny surface towards the sand)
* Place the thermometer in the sand. Record the temperature of the sand.
* Obtain one liter of cool water.
* Record the temperature.
* Pour it over the sand and collect the water as it drains out.
* Immediately record the temperature of the sand and the water collected.
* Record your results in a chart.

Q1: What is your explanation of the results?
Q2: How does the answer to Q1 apply to your blood circulating through your body when you are exercising?

What we learned:

 * Heat is transferred to water.
 * Water absorbs the heat.
 * Application: Perspiration cools our body as it absorbs the heat. How?

blood transfers heat from our muscles to ----> skin,  produces ---> perspiration ----> helps cool our body

WLW Day 2: Ionic Bonding

Science experiments time. . .

Experiment # 1: Ionic Bonding

Materials Needed:

2 inflated balloons                                          

thread                                                             

string                                                              

piece of material (nylon, wool, or fur)

nylon stocking

piece of white paper

Instructions:

* Tie the ends of the thread to the knotted ends of the balloons, and tie the middle of the thread to the middle of the string.

* Rub the balloons with a piece of material, and then pick them up by holding the ends of the string and stretching it to its full length.

   Q: What happens to the balloons when they are close together?

    Explanation: The material used to rub the balloons transferred electrons to the balloons.

   Q: What electrical charge does the balloon have now?

* Cut 2 3X12 inch strips of material from the nylon stocking.

* Place both strips on a piece of white paper and rub them briskly in your hand.

* With your fingers lift the 2pcs of nylon and hold them side-by-side.

    

    Q: What happened? Why?

* Now bring one of the nylon strips near one of the balloons.

   Q: What happened?

 What we learned:

 * atoms with the same charge, repel

 * atoms with opposite charge, attract/stick together = Ionic bond

    

We are almost ready. . . for Science

Made that trip to Sta. Cruz, Manila last week to scour for our Science experiment materials.

Our stash is almost complete for Unit 2 and we are ready to go! Gia and I can't wait to start with our Science experiments and activities. =)

The list of materials ( excluding common household items) for AOP Lifepac Science for Grade 10 consists of:

• Alligator clip leads, 2/pk
• Alpha Omega Biology Slide Set

  Ascaris mitosis, onion root tip, Diatoms, frog ovary, frog sperm, human blood smear, human bone, kidney section, muscle types section, motor neuron smear, Spirogyra, and Ulva microscope slides

• Battery, 6 volt, alkaline
• Beaker, glass, 250 ml
• Biuret reagent, 30 ml
• Calcium hydroxide, 30 g (lime)
• Chalk (calcium carbonate), 12/pack
• Cups & lids, 8 oz plastic, 3/pack
• Electrolysis electrodes (2)
• Filter paper, 10/pkg
• Forceps, stainless steel
• Funnel, plastic, 65 mm dia.
• Glucose test strips, 50 pack
• Graduated cylinder, plastic, 10 ml
• Hydrochloric acid, 30 ml
• Iodine solution (Lugol's) 30ml
• Lab apron, economy
• Litmus paper, blue, 100 strips
• Litmus paper, red, 100 strips
• Magnifier, tripod, 10X
• Methylene blue, 1%, 15 ml
• Osmosis Set
• P.T.C. test paper, 100/vial
• Petri dish, plastic, 2/pk
• Phenolphthalein solution, 15ml
• Pipet (medicine dropper)
• Potassium permanganate, 30 g
• Probe & seeker, chrome, 6"
• Protozoa Hatchery Kit
• Razor blade, single edge
• Safety gloves, size 8-8½ med.
• Safety goggles, full-size
• Sand, coarse, 1 lb.
• Scissors, dissecting, 4½"
• Screen, 20 mesh, steel, 4x4"
• Seeds, grass, 6 g pack
• Seeds, lima bean, 15 g pack
• Seeds, marigold, 300 mg pack
• Seeds, radish, 4 g pack
• Basic microscope slide set: 12 plain slides, 2 concave slides, coverslips, and storage box
• Sodium sulfate, 30 g
• Stirring rod, glass, 6"
• Teasing needle, straight
• Test tube rack, 6 holes
• Test tubes, small 13x100 mm
• Test tubes, x-large 19x150 mm
• Thermometer, Celsius, 12"

Yes! a very long list of items that. . . after the school year, we will have our own Science Laboratory! LOL!

Hopefully we will be able to complete them before the end of the school year. One Unit at a time. :)

Unit 2 (Basis of Life) will be about : 

* molecular models
* ionic and covalent bonding
* inorganic compounds experiment about solvent, thermal properties of water, acids,  bases and salts
* chemical reactions like electrolysis and using yeasts
* organic compounds like testing for starch, sugar, oil and protein in some food
* and,  properties of enzymes

So here's our stash (in photo) :

Grade 10 Unit 2 materials

stored securely (p.s. we need a bigger container soon)

Oh how this simple exercise of gathering all the materials reminds me of how I love Science back when I was in school. 

Rocking Science we should be!