What’s Happened in Science Lately?
Oldest Mayan Mural Discovered
The find upends everything they thought they knew about the origins of Maya
art, writing, and rule.
Oldest Mayan Mural Discovered
The mural tells the story of creation, the mythology of kingship, and the divine
right of a king, according to Saturno, who made the find and leads the
excavation.
Oldest Mayan Mural Discovered
The painting dates to 100 B.C., proving that stories of creation and kings, and
the use of elaborate art and writing to tell them were well established more
than 2,000 years ago, 700 years earlier than previously believed.
Buffy in the Solar System
Tentatively named 2004 XR190, the object appears to have a diameter
of between 500 and 1000 kilometres, making it somewhere between a
fifth and nearly half as wide as Pluto.
Scientists are at a loss for why its orbit is inlined at 47 degrees.
Narwhals Tusks are Super-Sensitive
Narwhal whales tusks are super-sensitive. The first known animal
tusks of this kind.
Narwhals Tusks are Super-Sensitive
Able to sense concentration gradients, temperature gradients, and
perhaps sound.
Ask Mr. Hellman Topics
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Scientific Explanation of Fire and Flame
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Flammable Flatuance
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Atoms in a Grain of Salt
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Poison Sumac and Skin Rashes
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Slimy Eggs
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Spontaneous Combustuion
How Would You Scientificly Explain Fire
Fire is a chemical reaction that
releases energy, another name
for this is ???.
How Would You Scientificly Explain Fire
Fire is a chemical reaction that
releases energy, another name
for this is exothermic.
How Would You Scientificly Explain Fire
Fire is the combination of oxygen
in the air with the starches, sugars, cellulose, and proteins that
are in wood.
How Would You Scientificly Explain Fire
The flame you see are gasses
released from the surface of the
wood (where the first chemical
reaction takes place).
How Would You Scientificly Explain Fire
These gasses are still burning
and that is why you see a colored
flame.
I’m Not Being Funny but are Farts Flammable and
If So Why?
Technically, yes. This is because they contain both Hydrogen and
Methane which are flammable gases.
?
H2 + O2 → H2 O
?
CH4 + O2 → CO2 + H2 O
I’m Not Being Funny but are Farts Flammable and
If So Why?
Technically, yes. This is because they contain both Hydrogen and
Methane which are flammable gases.
2H2 + O2 → 2H2 O
CH4 + 2O2 → CO2 + 2H2 O
Choose Your Roommate Wisely...
What animal produces the most CH4 and H2 relative to their body
weight?
Choose Your Roommate Wisely...
What animal produces the most CH4 and H2 relative to their body
weight?
Choose Your Roommate Wisely...
What animal produces the most CH4 and H2 relative to their body
weight?
Choose Your Roommate Wisely...
What animal produces the most CH4 and H2 relative to their body
weight?
T ERMITES !
How Many Atoms Does it Take to See Them?
I wasn’t able to find an exact answer to your question.
But I did find an estimate for the number of atoms in a grain of salt:
1,200,000,000,000,000,000
How Many Atoms Does it Take to See Them?
You can probably crush a piece of salt into 10 pieces and still see
them, so we can divide this number 10:
1, 200, 000, 000, 000, 000, 000 ÷ 10 = 120, 000, 000, 000, 000, 000
How Many Atoms Does it Take to See Them?
How many times can you crush these small crystals of salt?
How Many Atoms Does it Take to See Them?
How many times can you crush these small crystals of salt?
Go home and find out!
How Many Atoms Does it Take to See Them?
1111111
0000000
0000000
1111111
0000000
1111111
0000000
1111111
0000000
1111111
0000000
1111111
0000000
1111111
0000000
1111111
111
000
000
111
000
111
000
111
11
00
00
11
00
11
0110
Suppose you can crush a single grain of salt in 6, then into 2, then into
5 pieces. How many atoms are in one of the smallest grains now?
Remember, one grain has about 1,200,000,000,000,000,000 atoms!
What Poison Sumac, Eczema & Psoriasis?
Poisen Sumac is a plant that excreets Urushiol Oil.
Over half the people in the United States are allergic to this oil, and it
doesn’t take much to cause a rash in those that are allergic to it.
1
4
ounce of Urushoil Oil could cause a rash on everyone in the world.
The amount of Urushoil on the head of a pin would cause a rash in
500 people!
What Poison Sumac, Eczema & Psoriasis?
Eczema is a general term representing skin rashes.
What Poison Sumac, Eczema & Psoriasis?
Psoriasis is a specific type of skin inflamation.
Plaque psoriasis is the most common type of psoriasis. About 80% of
people who develop psoriasis have plaque psoriasis.
What Poison Sumac, Eczema & Psoriasis?
Appears as patches of raised,
reddish skin covered by silverywhite scale. These patches, or
plaques, frequently form on the
elbows, knees, lower back, and
scalp.
There is alot of discomfort associated with plaque psoriasis and to
date there is no gauranteed cure.
Slimy Eggs
Hi I was wondering, when you put an egg in vinegar why does
it get all (like) floopy and slimy (like the egg shell). Is
there like a chemical reaction or something?
CaCO3 (s) + 2CH3 COOH(l) → Ca(CH3 COO)2 (s)
{z
}
{z
}
|
| {z } |
Calcium Carbonate
Vinegar
Calcium Acetate
+ H2O(l) + CO2 (g)
Vinegar is acidic (acetic acid), and egg shells are made of calcium carbonate.
Acids react with carbonates by forming carbon dioxide.
Slimy Eggs
When the egg is in the vinegar,
you may notice bubbles escaping. This is the reaction between
vinegar and calcium producing
carbon dioxide.
Slimy Eggs
The egg shell is soft or gooey afterwards because all the carbon
has left the egg.
If you leave the egg on the
counter overnight, it should reabsorb the carbon from the carbon
dioxide in the air and firm again.
Knot Your Normal Chicken Bone
You can tie chicken bones into
knots after soaking the dryed
bones in vinegar.
Let the bone reabsorb carbon
from the air, and ask an adult how
you did it!
How Do We Spontaneously Combust?
How Do We Spontaneously Combust?
People Do Not Spontaneously Combust
There has never been any scientific evidence of
spontaneous combustion.
How Do We Spontaneously Combust?
Instead, what all the evidence suggests that:
1. People die, and sometimes they die alone and near an open
flame (cigarettes, candles, fireplaces throwing embers, ...)
2. Most of the time, either nothing burns or everything burns down
3. Occasionally, under the right circumstances, there is just enough
oxygen in the room for the body and items close to it to burn.
Then the fire suffocates because there is not enough oxygen to
sustain it.
Now It’s My Turn to Ask the Question
Suppose your an author;
Suppose you need to sell books — this is how you make your living;
What are some ways that you could sell more books?
The History of Spontaneous Combustion
1725 - France: Nicole Millers husband acquitted of murder by a doctor
who convinced the court that spontaneous combustion does happen.
1731 - Italy: Countess Cornelia de Bandi found in ashes on the floor of
her bedroom chamber.
1853 - The author Charles Dickens uses spontaneous combustion in
Bleak House to kill off a character...
Dickens book sells like, wildfire! By writing about a spontaneous
combustion as a Scientific Fact instead of an unproved theory, he
convinces generations of people that spontaneous combustion
actually happens.
The History of Spontaneous Combustion
Even today some people believe in spontaneous combustion.
There are whole books written by people proposing different theories
(and many websites).
But all these books miss an important ingredient for any valid scientific
theory... and it is something youve already used in this class!