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Archive for February 2015

Why are lemons sour? By Mary And Phoenix ;)

If you've ever taken a bite out of a lemon, you already know they pack some serious sour power this is because they contain citric acid, which is a weak organic acid found in many fruits and vegetables. 

because lemons and limes have more citric acid than most others, they have an even more sour taste


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Why are lemons sour? By Makayla and Neeka

The juice of the lemon is about 5% to 6% citric acid, which makes the lemon have a sour taste.
When the lemon was first introduced to the Americans was in 1493 when Christopher Columbus
brought lemon seeds to America. The lemons were first used as medicine. Then is 19th century they only planted in Florida and California.  



https://www.youtube.com/watch?v=6xwmpHE2haQ







why do we see colors? By Mary ;)

When light hits an object say, a banana the object absorbs some of the light and reflects the rest of it

When you look at a banana, the wavelengths of reflected light determine what color you see.The light waves reflect off the banana's peel and hit the light-sensitive retina at the back of your eye That's where cones come in.

Cones are one type of photoreceptor, the tiny cells in the retina that respond to light Most of us have 6 to 7 million cones, and almost all of them are concentrated on a 0.3 millimeter spot on the retina called the fovea centralis.
 ;) :) ') 8)







are mermaids real BY TOMMY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 If there can be humans then there can be other  superior life forms like us. 
if we cant see them it dose not mean they are not real. the ocean is very big and we havent explored all of it so there can be more creatures out there that we havent seen yet like mermaids.


What kinds of jellyfish are deadly? By Makayla

I am going to name the top 7 most deadly jelly fish in the world.

1.

 Box Jellyfish

Sea Wasp Box Jellyfish (Wikimedia)
this  is the most deadly jellyfish in the world, and one of the most deadly creatures on the planet altogether. It is also known as the marine stinger. Since 1954, 5,568 deaths have been attributed to this jelly. There fifteen tentacles on this type of jellyfish, which may extend ten feet in length.

2.

Irukandji Jellyfish

Flickr / SABERABOR


 You are unlikely to ever see it coming, since it measures only 0.2 inches across and is nearly transparent. It is a member of the notorious box jellyfish family, Its toxin is 100 stronger than that of a cobra.
3. The Portuguese Man o’ War may be beautiful, but it is also one of the deadliest jellyfish in the world. The sting leaves a welt like a whip mark, which can be very painful for several days. The venom can cause fever and shock, and may cause the heart or lungs to stop functioning. This can cause death.

Portuguese Man o’ War.

Flickr / Thomas Quine

Why does the microwave cook faster than an oven? By Makayla

microwave cooks food much faster than a conventional oven because it heats both the inside and outside of the food the same time. A conventional oven or frying pan heats the surface of the food first and the heat gradually moves toward the center. 

 The microwave radiation is tuned to heat water molecules since most food is made of some amount of water these work great for fast heating. the only heat you feel in a microwave is the steam created by this heating. Ovens heat air which then slowly transfers the heat to food.





What creatures don't have eyes? By Caleb

From the line queue you can see the bat cave a...
From the line queue you can see the bat cave at Lagoon in Utah (Photo credit: Wikipedia)
English: Animals of Smoke Hole Canyon: Unident...
English: Animals of Smoke Hole Canyon: Unidentified crayfish from South Branch Potomac River (Photo credit: Wikipedia)
English: hydra
English: hydra (Photo credit: Wikipedia)
English: The olm Slovenščina: Človeška ribica ...
English: The olm Slovenščina: Človeška ribica Српски / Srpski: човечија рибица (Photo credit: Wikipedia)
Kaua‘i cave wolf spider (Adelocosa anops)
Kaua‘i cave wolf spider (Adelocosa anops) (Photo credit: Wikipedia)
Sea urchins like this purple sea urchin can da...
Sea urchins like this purple sea urchin can damage kelp forests by chewing through kelp holdfasts (Photo credit: Wikipedia)
Naked mole rat in a zoo.
Naked mole rat in a zoo. (Photo credit: Wikipedia)
I think that this is creepy. 
Texas blind salamander
Texas blind salamander (Photo credit: Wikipedia)
English: A blind cave tetra, also known as Mex...
English: A blind cave tetra, also known as Mexican tetra (') living in the zoo of Rostock. Deutsch: Ein blinder Höhlensalmler (Astyanax mexicanus), der im Rostocker Zoo dem Publikum gezeigt wird. Français : Un tétra aveugle (Astyanax mexicanus) présenté au public dans le jardin zoologique de Rostock. (Photo credit: Wikipedia)
Crotaphatrema tchabalmbaboensis
Crotaphatrema tchabalmbaboensis (Photo credit: Wikipedia)
Here are some animals that don't have or use their eyes.
Star-nosed Mole from US NPS
Star-nosed Mole from US NPS (Photo credit: Wikipedia)Here

Why do cats purr? By Mary

for many pet owners, the humming purr of a squinting cat is the unmistakable signal that their feline is happy and healthy.

In many ways this is true: behaviorists believe the original function of purring was to enable a kitten to tell his mother that "all is well." This often occurs during nursing. A kitten can't meow and nurse at the same time, but can purr and nurse without any problem. The mother often purrs back, reassuring the kitten using this tactile, resonant communication.

This is why your cat purrs when petted, instinctively giving the signal "all is well," a message you can both feel and hear.

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