INTRODUCTION- EarthSci Flashcards
What are the 4 subsystems of the Earth?
- Atmosphere (Gaseous)
- Biosphere (Life)
- Hydrosphere (Water)
- Geosphere (Land)
(GHAB)
Meaning of Earth Science.
Earth Science is the study of the Earth’s structure, processes, properties, and its neighboring planets.
What are the four major branches of Earth Science?
- Geology
- Oceanography
- Meteorology
- Astronomy
(GOMA)
The first general term for the first continents.
Cratons
The first planet that collided with Earth.
Theia
The first photosynthesizers.
Cyanobacteria
What was the first biggest supercontinent?
Rodinia
What was the last supercontinent?
Pangea
What were the animals with shells or spines called 1.1 Billion yrs ago?
Trilobites
This supercontinent was formed after Rodinia and before Pangea
Pannotia
What were the 4 Major Extinctions that happened?
- Ordovician
- Devonian
- Permian
- Triasic
(ODPT)
What are the three Major Theories of the origin of the Universe?
- Big Bang Theory- Georges Lemaitre
- Steady State Theory- Hermann Bundi
- Pulsating Theory- J.C. Bose
What are the 4 major stages/phases of History of Earth?
- Precambrian, 4.6 Billion yrs ago
- Paleozoic, 542 Million yrs ago
- Mesozoic, 250 Million yrs ago
- Cenozoic, 65 Million yrs ago
(PPMC)
What heavenly body occurred after the Big Splash/ Theia collision against Earth?
Moon
What was found in Earth when Earth had cooled down 3.8 Billion yrs ago?
Water
What was the star called after it was born in 4.5 Billion yrs ago?
Sun
A wide variety of animals had burst onto the evolutionary scene,1.1 Billion yrs ago, in an event called the?
Cambrian Explosion
How many yrs ago was the first Ice Age?
2.4 Billion yrs ago
How many yrs ago was Pangea formed?
250 Million yrs ago
In general, name the progress of the environment that occurred 6 Million yrs ago?
- Mammals Existed
- Early Humans (Evolution)
- Tools and Fire
- Interactions and Communities
- Industrial and Technology
