Water Pollution Effect on Sea Ecology Sea pollution is caused by a long list of contributing factors such as:Chemicals – directly via sewage, which flows into the sea,
and indirectly via polluted underground water: (Picture Credit to Queensland ... Continue Reading
The Carbon Cycle Since the industrial revolution the amount of carbon dioxide (CO2) has steadily increased in the atmosphere, this is due to several different factors, most notably the increase in fossil fuel burning source and increased deforestation.Watch the follo... Continue Reading
The Dead Sea A family traveled to the Dead Sea.The Dead Sea is the lowest place on the earth. (-429 m under the sea level) .Look at the short video they filmed in the way down .You can see the sign along the way marking the point when they pass trough the&n... Continue Reading
Experiment light
we are surrounded by lightBut we do not ask ourselves what light actually is ?
For example:
when we look in a mirror we can see ourselves
when we look at a spoon in a glass of water it looks broken
What is rainbow?
When light hits an o... Continue Reading
Backgammon Game Consider throwing a coin multiple times. Even huge amount of times. Let's discuss - what would be the number of times you would get a particular side out of the total number of throws?
Let's see that in any occasion of throwing a symmetri... Continue Reading
משפחה של פונקציות סינוס באיור הדינמי, ראה קישור מוצגת משפחת פונקציות
עברו אלו ערכים של פרמטר a הפונקציה מהמשפחה הנ"ל היא פונקציה עולה בקטע
?
... Continue Reading
complex numbers multiplication A сomplex number is represented by z=a+bi , a and b are real numbers and i is the imaginary unit ,satisfying the equation i2 = −1.
For more information about complex numers link to:
http://blossoms.mit.edu/videos/lessons/compl... Continue Reading
Galileo thermometer A Galileo
Thermometer is a device made of a sealed glass cylinder, containing a clear
liquid (water, for example), and several floating glass bubbles, each filled with a
different color liquid, and a small metal tag hanging from it.
... Continue Reading
About the ocean acidification phenomenon The term 'Climate Change' is a big topic these days. It refers to several related phenomena such as higher temperatures noticed, more droughts, changing rain and snow patterns, melting glaciers, rising sea level and increased ocean acidity.
The ocea... Continue Reading
ריבוי המדוזות בחופי ארץ ישראל
כפי שראינו בסרטון, לשינויי הטמפרטורה והזיהום יש השפעה ישירה ועקיפה על אוכלוסיות המדוזות, הדגים וצבי הים. לדוגמא: הורדת הזיהום תגדיל את כמות הצבים, דבר שיגרור ירידה בכמות המדוזות, בשל היות הצבים טורפי מדוזות.
שאל... Continue Reading
planting trees Why do gardeners
prefer to plant trees in silty soil instead of in sandy soil?click here for using the animation.
Select
the correct answer:... Continue Reading
Why does Earth have deserts? Take a look at a physical map of the world. You can notice that all deserts on our Earth are located at approximately thirty degrees on either side of the equator.
Learn what is the reason for that phenomenon from the video below ... Continue Reading
מערכים,דינמי
כתוב תוכנית אשר קולטת מחרוזת למערך בגודל 80. התוכנית סופרת מספר תווים ומייצרת מחרוזת דינמית בגודל המחרוזת שנקלטה.
התוכנית מייצרת מערך דו ממדי דינמי בגודל 5X5 מסוג char ומציבה באלכסון הראשי את האות הראשונה שבמחרו... Continue Reading
Plastic recycling Plastic is manufactured by the polymerization
process, which connects monomers to create polymers. Common types of polymers in
our lives are presented in the table below:
Example... Continue Reading
Sea level rise risk Sea level is a term describing the altitude of the water at sea(Haifa) picture taken by :dina izGlobal warming due to human activity has countless examples all over the world.Global warming is basically the constant rise of the world average temperat... Continue Reading
Multimedia Questions
Inquiry Questions
