Earth & Space
Which of Earth's systems was most affected by fossilized dinosaurs?
lithosphere
Drag the tiles to the correct boxes to complete the pairs. After its formation, early Earth experienced several crucial events that were responsible for creating its spheres. Match each Precambrian event to the sphere it played the biggest role in creating.
lithosphere: Molten lava solidifies into a solid crust. atmosphere: Frequent volcanic eruptions emit large amounts of carbon dioxide hydrosphere: Clouds form, followed by rains.
Drag each tile to the correct location. Identify each process as a carbon source or a carbon sink.
Carbon sink: Photosynthesis, fossilization, oecean absorption. Carbon Source: Combustion, respiration
Complete the passage about cyanobacteria.
About three billion years ago, single-celled organisms called cyanobacteria lived in Earth's oceans. They thrived on the ocean's abundance of carbon dioxide, which they used during the process of photosynthesis. Much later, this process allowed organisms, such as fish, to survive by extracting dissolved oxygenfrom ocean waters.
Complete the following sentences to correctly explain how life could have formed on Earth:
According to one hypothesis, life on Earth emerged from amino acids in the presence of large amounts of gases seeping from deep-ocean vents. Another hypothesis, called the primordial soup, suggests that the formation of life was due to the effects of lightning in Earth's atmosphere.
The Cretaceous-Paleogene was a mass extinction event in which nearly every single large, land-dwelling dinosaur went extinct. Which of the following did not result from this extinction event?
Meteorites struck the region that Mexico now occupies.
Pick the correct term:
Plants add carbon to the atmosphere during respiration and remove carbon from atmosphere during photosynthesis. These processes form the carbon cycle.
How did cyanobacteria affect Earth's early atmosphere?
They replaced carbon dioxide with oxygen in the atmosphere.
Drag each tile to the correct location. Match each process to where it occurs in the carbon cycle.
Think of the circle as a clock: combustion: at 1:00 respiration by plants: inside 2:00 decay: 5:30 death: 7:00 respiration by animals: 9:00 feeding: inside, points to rabbit photosynthesis: inside 10:00
Which compound was abundant in Precambrian Earth's oceans, before complex life evolved on Earth?
dissolved carbon dioxide
