The Brachiosaurus

Researched by Lilyann Wangerin

Brachiosaurus Description

  • Weighed about 70 tons
  • 70 feet long
  • Stood 39 feet off the ground which is as tall as a 4 story building and twice as tall as an adult giraffe
  • Nostrils were on top of the head

Period Brachiosaurus Lived In

  • Lived in the Late Jurassic Period
  • Also lived in the Early Cretaceous Period
  • Diplodocus and Apatosaurus also lived in the Late Jurassic period.

Brachiosaurus's Diet

  • Ate plants or was a herbivore.
  • Ate up to 400 kilograms or 880 pounds of plants everyday
  • Plants were coniferous trees, gingkoes and cycads

Brachiosaurus's Habitat

  • Lived 155.7 million to 150.8 million years ago in what is now Africa and North America
  • Also lived in woodlands of Europe and North Africa
  • Weather was semiarid with few wet seasons

Lifespan of Brachiosaurus

  • Unknown lifespan of the Brachiosaurus
  • Lived from Late Jurassic Period to the Early Cretaceous Period
  • Lived 155.7 million to 150.8 million years ago

Dinossaurs like the Brachiosaurus

  • Ultrasaurus may be just a large Brachiosaurus
  • Seismosaurus and Supersaurus are like Brachiosaurus
  • Diplodocus and Apatosaurus are like Brachiosaurus

Brachiosaurus Fossils

Big image

Theories of Dinosaurs Being Extincted

  • Nobody knows why and how they became extnicted
  • Three most popular theories are Asteroid Theory, Volcanic Theory, and Ice Age
  • The Earth may have changed the weather dinosaurs weren't able to adapt to the cooler, dryer weather

Ice Age?

  • Some think it was a severe Ice Age
  • Dinosaurs wouldn't be able to survive
  • that is what some think how dinosaurs became extincted


  • This is the most popular theory
  • According to the theory a meteor hit earth about 65 million years ago
  • Would throw so much dirt that it would block the sunlight
  • Plants and animals would die from the dramatic change in climate
  • The results would be to much for the dinosaurs, they weren't able to survive


  • Last theory to talk about is the Volcanic Activity theory
  • Volcano may have erupted and sent out a huge amount of ash and lava (or magma) around 65 million years ago
  • Could have pumped so much ash and magma that it blocked the sun causing the dinosaurs to die

My Ideas About Extinction

  • I agree with the Volcanic Activity theory.
  • A volcano erupted and spewed lava everywhere
  • Lava covered everything including the dinosaurs
  • Dinosaurs wouldn't be able to survive with the lava over them


  • Research something
  • Research something else or research about the Brachiosaurus
  • May even find some information that I didn't find
  • Remember this information, it will be very helpful in the future


How Did Dinosaurs Become Extinct? Life Studies on Line. Retrieved from

World Book Encyclopedia. Vol. 5. World Book, Inc., 2006.