Day 3 Assignment - Irish, Emmaleigh
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School
California State University, Fullerton *
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Course
101
Subject
History
Date
Feb 20, 2024
Type
Pages
1
Uploaded by msemmaleighirish
Emmaleigh Irish ESC 101 F Day 3 Assignment Ch. 1 1.
Explain the expanding Universe Theory and its relationships to the Big Bang theory. According to these theories, when did the Universe form? The expanding Universe Theory claims that the universe is always expanding. This can be related to the Big Bang Theory because everything in our universe can be traced back to one single point in which matter expanded rapidly. Using this logic, we can examine that elements within our universe are slowly expanding away from one central starting point. According to these theories, the universe formed roughly 13.77 billion years ago. 2.
Why isn't Earth homogenous? Why is it round? Why did the core form? The Earth is not homogenous due to the density of its initial materials being centrally located in its center. The Earth’s roundness can be attributed to its gravitational force because the Earth’s gravity pulls on each side of the Earth equally. The Earth’s core formed from extreme heat and compression from gravity, each of which was responsible for molten metal making its way to the center of the Earth. 3.
What is the proportion of land area to ocean area on the Earth? Is the seafloor completely flat? Land area makes up about 29% while Ocean area accounts for approximately 71% of Earth. The seafloor is not flat. Ch. 9 4.
Compare how relative ages and numerical ages are determined. The relative age of an object is determined by comparing the position of an object in layered rock. By contrast, Numerical ages are determined by analyzing the radioactive decay of an object. 5.
Explain how uniformitarianism, original horizontality, and superposition allow us to determine the relative ages of geologic events. Uniformitarianism allows us to determine the relative ages of geologic events by utilizing what we can see in the present to estimate how it came to be (“The present is the key to the past” – James Hutton). Original horizontality can be used to determine the relative ages of geologic events by examining how layers of deposited sediment were originally laid in a horizontal manner. Superposition can help us determine the relative ages of geologic events by knowing that lower layers will be older than those above through examination of sequence. 6.
Describe the changes on Earth that occurred from the Precambrian eon to the Cambrian. Explain how the change is connected to the theory of evolution. From the Precambrian eon to the Cambrian, changes on Earth included increased oxygen levels, the introduction of multicellular and hard-shelled organisms, and the early evolution of photosynthesis. These changes can be connected to the theory of evolution as it is proof that life on Earth goes through multiple eras and changes.
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