IN CHEMISTRY WHAT IS A CATALYST a CATALYST SPEEDS CHEMICAL REACTIONS UP a CATALYST SPEEDS CHEMICAL REACTIONS UP WITHOUT GETTING INVOLVED Do you remember the catalyst in our elephant toothpaste chemical reaction ID: 595124
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DO YOU REMEMBER IN CHEMISTRY WHAT IS A “CATALYST”?Slide2
a CATALYST….
SPEEDS CHEMICAL REACTIONS UP!Slide3
a CATALYST….
SPEEDS CHEMICAL REACTIONS UP!
WITHOUT GETTING INVOLVEDSlide4
Do you remember the catalyst in our elephant toothpaste chemical reaction?
WATER
YEAST
HYDROGEN PEROXIDE
OXYGEN GASSlide5
The reaction would have taken DAYS without YEAST…the CATALYST here.
WATER -- product
YEAST -- CATALYST
HYDROGEN PEROXIDE -- reactant
OXYGEN GAS -- productSlide6
What is the chemical CATALYST in PHOTOSYNTHESIS?
carbon dioxide B. water C. sunlight
D. chlorophyll E. glucose F. oxygen gas
6
6
6Slide7
What is the chemical CATALYST in PHOTOSYNTHESIS?
carbon dioxide --reactant
B.
water -- reactant
C. sunlight -- energyD.
CHLOROPHYLL--CATALYST
E.
glucose
– product F. oxygen gas -- product
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6
6Slide8
What is the catalyst for IRON RUST chemical OXIDATION reaction?
OXYGEN
IRON
WATERSlide9
What is the catalyst for IRON RUST chemical OXIDATION reaction?
OXYGEN
IRON
WATER – SPEEDS UP the rusting of ironSlide10
What is the catalyst for IRON RUST chemical OXIDATION reaction?
OXYGEN
IRON
WATER – SPEEDS UP the rusting of iron
holding the oxygen bubbles
more tightly to the iron nailsSlide11
99.9% of species on Earth have become extinct….disappears
Most of them during the mass extinction events between geologic eras:
Precambrian
Paleozoic
Mesozoic andCenozoicSlide12
SOMETIMES when a SPECIES becomes EXTINCT…it
SLOWLY EVOLVED
into another species!
hundreds of thousand…MILLIONS of YEARS !!!Slide13
Sometimes when a SPECIES becomes extinct…it
SLOWLY EVOLVED
into ANOTHER SPECIES!
SPECIATIONSlide14
SPECIATION happens when environmental changes force long-term genetic changes turning a species into another.Slide15
SPECIATION happens when environmental changes force long-term genetic changes turning a species into another.Slide16
What “catalyst” SPEEDS UP SPECIATION?Slide17
That’s right!
We can see this happening today WITH our closest animal relatives, the chimpanzee!Slide18
Because chimpanzees in Africa are being AGGRESSIVELY hunted for their meat…Slide19
because their
ENVIRONMENT
IS being
changed by human development… Slide20
The CHIMPANZEE species may DISAPPEAR!Slide21
But CHIMPANZEES are NOT going to give up!
Some chimpanzees have headed for the trees.Slide22
But CHIMPANZEES are NOT going to give up!
Some chimpanzees have headed for the trees.
Some chimpanzees have headed to the ground.Slide23
These 2 populations of chimpanzees are becoming ____________!
Some chimpanzees have headed for the trees.
Some chimpanzees have headed to the ground.Slide24
These 2 populations of chimpanzees
are becoming
ISOLATED from one another!
Some chimpanzees have headed for the trees.
Some chimpanzees have headed to the ground.Slide25
Some chimpanzees have headed for the trees.
BONOBOS
Some chimpanzees have headed to the ground.
BILIS
ISOLATED
POPULATIONS can START UP NEW SPECIES
!
https://
www.cnn.com/2018/02/07/africa/orange-crocodiles-cave-gabon-africa/index.htmlSlide26
Some chimpanzees have headed for the trees.
BONOBOS
Some chimpanzees have headed to the ground.
BILIS
Which chimp population has smaller lightweight chimps?Slide27
Some chimpanzees have headed for the trees.
BONOBOS
Some chimpanzees have headed to the ground.
BILIS
Which chimp population has smaller lightweight chimps?Slide28
Some chimpanzees have headed for the trees.
BONOBOS
Some chimpanzees have headed to the ground. BILIS
Which population would be more successful hunting at night?Slide29
Some chimpanzees have headed for the trees.
BONOBOS
Some chimpanzees have headed to the ground.
BILIS
Which population would be more successful hunting at night?Slide30
Some chimpanzees have headed for the trees.
BONOBOS
Some chimpanzees have headed to the ground.
BILIS
WHAT OTHER DIFFERENCES between these subspecies COULD BE DEVELOPING?
DIET? Who leads?Slide31
Bili
apes are aggressive, patriarchal, mostly meat-eaters.
The bonobos are peaceful, intelligent, matriarchal, mostly vegetarian.Slide32
Because these 2 chimpanzee populations have become
ISOLATED
, the
bonobos
and bilis want less and less to do with each other.Slide33
Have they increased their chance that SOME chimpanzee species will survive?????
Q & A think, pair & share…Slide34
Bili
apes are aggressive, patriarchal, mostly meat-eaters.
The bonobos are peaceful, intelligent, matriarchal, mostly vegetarian.
ISOLATION
SPEEDS UP
SPECIATION
(new
species from old species)!Slide35
Eventually, we may have only bili or bonobo primate species, but no more chimpanzee species.Slide36
exerpt
from “Dogs Decoded” grey foxes in Russia.Slide37
Do the Flow Chart activity. Have students record their results in their notes… Slide38
isolated neanderthal cavemen & women POPULATIONS MAY HAVE HELPED THEIR SPECIES FROM COMPLETELY DYING OUT!!!!
IN US!!!!!
http://www.cnn.com/2016/03/19/us/neanderthal-human-interbred-irpt
/