Eras
This era is also known as the Age of the Dinosaurs
These organisms were the first life on earth and they were single celled and had no nucleus.
What are prokaryotes?
A trace or imprint of a living thing that is PRESERVED by geological processes is called a:
What is a fossil?
The earth is this many years old.
What is 4.6 billion years old
True or false. Eons are the biggest span of time in the Geological Time Scale
TRUE - organism with NO BRAINS were able to survive for billions of years...like the jellyfish - respect.
This era is known as the Age of Mammals
What is the Cenozoic Era?
Eventually they became cyanobacteria and decided to produce their own food through this familiar plant process:
What is photosynthesis?
Fossils can be found in the layers of the earth. The oldest layers are at the:
What is the bottom?
What has happened when a species has died out and no longer exists?
What is extinction?
Sponges, fish, snails, trilobites...little ocean organisms...lived in which era?
What is the Paleozoic era?
This era is known as the Age of Amphibians
What is the Paleozoic era?
Cyanobacteria also created oxygen, which thus started to form the _________ layer
What is the ozone layer AKA our atmosphere?
Estimating the age of a fossil by comparing it to the fossils that are older or younger is called:
What is relative dating?
True or false, ice ages, volcanoes and even asteroids can cause a mass extinction.
True
At the end of the Paleozoic era the worlds largest mass extinction took place...which organisms died?
What are 96% of the oceans organisms?
This era is when Life Starts and it is also known as the Age of Invertebrates
What is the Precambrian Era?
Eventually they became more multi-cellular and had a nucleus. These organisms were called:
What are Eukaryotes?
Estimating the age of a fossil can be done by a process called absolute dating, which looks at what substance in the rocks around the fossil?
What are radioactive elements?
When a bunch of different species die out within a short period of time, it is called a
What is a mass extinction?
Conifers and flowering plants came around in this era
What is the Mesozoic era?
True or False - eras are the largest measure of time in the Geological Time Scale? And what is the longest measurement?
False! It is EONS that are the largest!
The type of organism that dominated the Precambrian era was the
What is the Prokaryote?
The oldest living animal that we talked about in these levels and is still alive today is the: (it has purple blood)
What is the horseshoe crab?
True or False: An asteroid instantly killed all the dinosaurs by way of explosions and fires.
FALSE-the asteroid killed some right away but many others died from the smoke, pollution, the fact that the sun was blocked and there was no light for photosynthesis which killed plants and then herbivores died and then the carnivores died and well this may be a short answer question on this test so are you listening?
How many years ago did the dinosaurs go extinct?
What is 65 million years ago?