- The “-mas” part on the end of Christmas and Xmas comes from the Old English word for “mass”.
- Other classic common abbreviations for “Christ” were: “Xp” and “Xt”, again both an abbreviated form of the Greek for Christ.
- The Greek letters “X” (Chi) and “p” (Rho) superimposed together was once a very common symbol signifying Christ and was called, somewhat unimaginatively, the Chi-Rho.
- The Chi-Rho was also used by scribes in a non-religious sense to mark some passage that was particularly good, with it literally implying “good”.
- In 1977, the Governor of New Hampshire issued a press release stating that journalists should cease taking the “Christ” out of “Christmas” as “Xmas” was a pagan spelling of Christmas. Perhaps he should have run that press release by a religious scholar before issuing it.
- Although, even those well versed and respected in Christianity often make the same mistake, such as Franklin Graham in an interview on CNN: “For us as Christians, this is one of the most holy of the holidays, the birth of our savior Jesus Christ. And for people to take Christ out of Christmas. They’re happy to say merry Xmas. Let’s just take Jesus out. And really, I think, a war against the name of Jesus Christ.”
Thursday, December 23, 2010
THE “X” IN “XMAS” DOESN’T TAKE THE “CHRIST” OUT OF “CHRISTMAS”
Monday, December 20, 2010
Saturday, November 6, 2010
10 amazing facts about animals
Fun with names
Wednesday, October 27, 2010
STEP Skills congrats LNHS!
Sunday, October 24, 2010
Saturday, August 14, 2010
Sunday, August 8, 2010
Light dependent phase and light-independent phase of photosynthesis
Activity No. __
Light dependent phase and light-independent phase of photosynthesis
I. Materials
Diagram of light-dependent and light-independent phase of photosynthesis
II. Procedure
Analyze the given diagram and answer the given questions.
I. Guide Questions
1. What raw material is needed in light-dependent phase?
2. What happened to water (H2O) molecule?
3. Into what molecule will hydrogen attach?
4. In which part of the chloroplast does light-dependent phase occur?
5. What is the role of chlorophyll in light-dependent phase?
6. What molecule was produced from the energy of flowing electrons?
7. What are the end products of light-dependent phase?
8. What raw material is needed in light-independent phase?
9. In which part of the chloroplast does light-independent phase occur?
10. What is the end product of light-independent phase?
Photosynthesis
Activity NO. ___
Photosynthesis
I. Materials
Diagram of photosynthesis
Marking pen
Paper
II. Procedure
Analyze the given diagram and answer the guide questions.
FOOD MAKING PROCESS
I. Guide Questions
1. What are the raw materials needed by plants?
2. What structure or part of plants will absorb the raw materials?
3. What kind of energy is needed by plants to convert raw materials into food?
4. What is the major source of this energy?
5. What will absorb the energy needed?
6. What are the end-products of food-making process?
7. What will happen to the end products?
8. What is the process of photosynthesis? Explain.
The role of chlorophyll in photosynthesis
Activity No. ___
The role of chlorophyll in photosynthesis
I. Materials
Beaker Iodine
Test tubes Iron stand
Carbon paper wire gauze
Alcohol lamp iron ring
Leaves test tube rack
Ethanol
II. Procedure
1. Get a sample plant with netter venation.
2. Choose two leaves of similar size from the sample plant.
3. Cover one leaf with carbon paper for one day; leave the other leaf uncovered.
4. Light the alcohol lamp and boil each leaf for 20 seconds to kill the cell.
5. Put out the flame. Then, transfer the leaves in a container or test tube. Add enough ethanol to cover the leaf.
6. Return the test tube to the beaker. Boil until the leaf loses its color.
7. When all the chlorophyll has been extracted, remove the leaves using a forceps. Rinse them with water then dry.
8. After drying, dip the leaves in a glass plate with iodine solution.
9. Observe any color change. A blue-violet color indicates the presence of starch produced and stored by plants.
III. Observation
| Color of the leaf when boiled | Color of the leaf when dipped in iodine |
Leaf A | | |
Leaf B | | |
IV. Analysis
1. Why did you boil the leaves in water and alcohol?
2. What is the color of the ethanol? What do you think dissolved on it?
3. Which part of the leaf shows the presence of starch?
4. Can plants produce food without chlorophyll? Explain.
5. Will plants exist without the energy of sunlight? Why or why not?
Wednesday, July 7, 2010
Effect of salt solutions on plant
Activity No. ___
Effect of salt solutions on plant
I. Materials
1 pc. big potato
2 pcs. jars / cups
Knife
Salt
II. Procedure
1. Label the jars Setup A and Setup B. Then fill it up with water.
2. Add spoonful of salt in Setup A. Stir until the salt dissolves.
3. Cut three to five slices of potato about 2mm.
4. Put an equal number of potato slices in each jars.
5. Leave the potatoes soaked for 20 minutes.
6. Take out the slices.
III. Observation
| Observations |
Setup A | |
Setup B | |
IV. Analysis
1. Which potatoes have lost water from the cells?
2. Which potatoes have gained water from the cells?
Measuring Osmosis
Activity No. __
Measuring Osmosis
I. Materials
2 pcs. raw eggs
2 pcs. wide-mouthed jars
400 ml. white vinegar
200 ml. distilled water
200 ml. 20% salt solution
Balance
Paper towels
Marking pen
II. Procedure
1. Using the marking pen, label the jars Setup A and Setup B.
2. Place one egg in each of the beakers.
3. Add enough vinegar to each beaker to cover the eggs.
4. After 24 hours, pour off the vinegar. Observe what has happened. Carefully remove the eggs from jars and dry with a paper towel.
5. Find the mass of each dry egg. Record your findings. Rinse the beakers and dry them thoroughly. Return each egg to its original jars.
6. Add 200 ml. distilled water to Setup A. Add 200 ml. salt solution to Setup B.
7. Allow each egg to remain in its jar for 24 hours.
8. After 24 hours, do the following for each egg:
a. Carefully remove the egg and dry it.
b. Record the mass of the egg.
c. Measure and record the remaining liquid.
III. Data and observation
Egg in Solution | Mass | Volume | ||
Original | Final | Original | Final | |
Setup A – distilled water | | | | |
Setup B – salt water | | | | |
IV. Analysis
1. Compare what happened to the mass of the egg in distilled water and in the egg placed in salt water.
2. What happened to the volume of distilled water and or salt water?
V. Application
1. If your put freshwater fish in saltwater or saltwater fish in freshwater, the fish will die. Use your knowledge of osmosis to explain why this happen.
Diffusion, and More of Capillarity
Activity No. __
Diffusion
I. Materials
Atsuete seeds
Glass with tap water
II. Procedure
1. Half fill a glass with tap water.
2. Add squeezed atsuete seeds. Observe.
III. Observation
Draw the glass before and after the activity.
IV. Analysis
1. Describe what happens to the water.
2. What is diffusion?
V. Application
1. Cite three everyday situations where diffusion happens.
Activity No. ___
More of capillarity
I. Materials
Beaker
Red food color
Stalks of celery
Knife
II. Procedure
1. Fill up the beaker with water. Put food color.
2. Cut stalks of celery about 10 centimeters long.
3. Dip the stalks into the beaker. Mark the water level.
4. Set aside the setup for 10 minutes or longer. Observe.
III. Observation
Draw what happened to the stalks of celery
IV. Analysis
1. What happened to the amount of water after the celery stalks have been dipped for 10 minutes?