Transcript Early Earth Foldable

Early Earth Foldable
Ch 14
Fold 2 papers so that there are 4 flaps. The
Titles of the for should be:
1) Redi and Pasteur
2) Miller and Urey
3) Endosymbiont Theory
4) Fossil Record
Redi and Pasteur—write bullet points and
cut out and glue left 2 pictures
• For a long time scientists thought life came from
non-living things (spontaneous generation)
• Redi and Pastuer proved that life only came
from other living things (biogenesis) with their
experiments
• Redi used covered rotting meat to prove
maggots came from flies not the meat itself
• Pasteur used flasks with broth that filtered out
microorganisms in the air
Redi’s
experiment
Pasteur’s
experiment
http://elf.xs.edu.ph/mywiki/images/
Redi_exp.gif
http://upload.wikimedia.org/wikipe
dia/commons/2/27/Experiment_Pa
steur_English.jpg
Miller and Urey-- On the underside of the 2nd
flap write the following:
• Early earth atmosphere was composed of
Carbon dioxide, water, nitrogen, ammonia,
methane and hydrogen gas
• These early components combine with
lightening gave the primordial soup
mixture to make the first early organic
molecules (building blocks of living things)
according to Miller and Urey’s theory
Cut out picture and glue it down
and write the following bullets.
• Miller and Urey used this
set up to simulate the
early Earth’s conditions
and made amino acids,
fatty acids, nucleoties and
monosaccharides, or the
building blocks of organic
molecules.
• This proved it could have
happened this way.
Endosymbiont Theory—write the
following bullets
• Building blocks then built the organic molecules,
then organic molecules built the first cells—
anaerobic, heterotrophic prokaryotes
• Adaptations such as photosynthesis (made
oxygen), aerobic respiration (used oxygen and
made more ATP than before) occurred
• Then larger cells engulfed smaller cells that did
photosynthesis or aerobic respiration and used
them in a symbiotic relationships (endosymbiont
theory)
Cut out last picture and glue it down and write the bullet
below.
• This is how
eukaryotes evolved
from prokaryotes.
http://learn.genetics.utah.edu/co
ntent/begin/cells/organelles/ima
ges/endosymbiosis.jpg
Fossil Record—write the bullet
below and then cut out the timeline
• Fossil record is used
to date when
organisms lived based
upon radioactive
measurements
(absolute dating) or
where they occur in
layers of rock (relative
dating—older fossils
are in lower layers)
Basics of each Era
• Precambrian—4.6 billion years ago to 542 mya;
1st life at 4 billion years, 1st prokaryotes, 1st
eukaryotes, 1st multicellular organisms
• Paleozoic—542 mya to 251 mya; appearance of
1st fish, amphibians, reptiles, land plants, birds
• Mesozoic—251 mya to 66 mya; appearance of
mammals, flowering plants, insects; dominated
by DINOSAURS and CONE-BEARING PLANTS
• Cenozoic—66 mya to present; appearance of
humans; dominanted by MAMMALS AND
FLOWERING PLANTS