can you please help me put these events in order from latest to earliest?:
-pangea, the supercontinent, begins to divide
-trilobites
-dinosaur extinction
-first crocodiles
-archaeopteryx (early bird)
-first flowering plants
-protozoa (single-celled, microscopic animals)
-first sharks
-first mammals
-first land animals
-first reptiles
-record writeen history
-neanderthal man (1400 cc brain)
-great extinction
-forests of coal plants
-first vertebrates (jawless fish with skeletons made of cartilage)
-first bony fishes
-bees
-first amphibians
-jellyfish appear
-tyrannosaurus rex
-modern horse
-first insects
-first dinosaurs
-earliest life (bacteria-like)
-pangea, the supercontinent, forms
-grass
-first vascular land plants (plants with roots and stems)
-water appeared on earth's surface
-earth formed
3 answers
Why don't you order the events as you think they occurred, and then we can critique your thinking. Some should be obvious... bees and grass didn't come until after the earth formed, for example.
i think it's like:
-earth formed
-water appeared on earth's surface
-first vascular land plants (plants with roots and stems)
-pangea forms
-pangea divides
-grass
-earliest life (bacteria-like)
- first flowering plants
-forests of coal plants
-first land animals
-first dinosaurs
-tyrannosaurus rex
-first reptiles
-first crocodiles
-first amphibians
-trilobites
-jellyfish appear
-protozoa
-bees
-first insects
-first vertebrates
-first sharks
-first bony fish
-archaeopteryx
-dinosaur extinction
-great extinction
-first mammals
-modern horse
-neanderthal man
-record written history
-earth formed
-water appeared on earth's surface
-first vascular land plants (plants with roots and stems)
-pangea forms
-pangea divides
-grass
-earliest life (bacteria-like)
- first flowering plants
-forests of coal plants
-first land animals
-first dinosaurs
-tyrannosaurus rex
-first reptiles
-first crocodiles
-first amphibians
-trilobites
-jellyfish appear
-protozoa
-bees
-first insects
-first vertebrates
-first sharks
-first bony fish
-archaeopteryx
-dinosaur extinction
-great extinction
-first mammals
-modern horse
-neanderthal man
-record written history
This is hard! I'm sure someone else can help you better than I can, but here's what I see from your timeline...
Pangea was formed 250 MYA (million years ago). It should be much later in your timeline.
Land plants were 475 MYA, so that should also be much later.
Some major events in order: simple cells (4 BYA), photosynthesis (3 BYA), complex cells (2 BYA), multicellular life (1 BYA), simple animals (600 MYA), arthropods (570 MYA), complex animals (550 MYA), fish (500 MYA), land plants (475 MYA), insects and seeds (400 MYA), amphibians (360 MYA), reptiles (300 MYA), mammals (200 MYA), birds (150 MYA), flowers (130 MYA), dinosaurs died (65 MYA).
I hope that is somewhat helpful. I would recommend googling things like "earth timeline," "evolution timeline," and "earth history" (without quotes) to fill in the gaps of your information. I would also strongly recommend DATING (putting a date beside) each event to more easily place the events. Good luck.
Pangea was formed 250 MYA (million years ago). It should be much later in your timeline.
Land plants were 475 MYA, so that should also be much later.
Some major events in order: simple cells (4 BYA), photosynthesis (3 BYA), complex cells (2 BYA), multicellular life (1 BYA), simple animals (600 MYA), arthropods (570 MYA), complex animals (550 MYA), fish (500 MYA), land plants (475 MYA), insects and seeds (400 MYA), amphibians (360 MYA), reptiles (300 MYA), mammals (200 MYA), birds (150 MYA), flowers (130 MYA), dinosaurs died (65 MYA).
I hope that is somewhat helpful. I would recommend googling things like "earth timeline," "evolution timeline," and "earth history" (without quotes) to fill in the gaps of your information. I would also strongly recommend DATING (putting a date beside) each event to more easily place the events. Good luck.
7 answers