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Test - My Planet Earth

Terms in this set (36)

How many eras is the geologic time scale divided into?
4 (Paleozoic, Mesozoic, Cenozoic and Phanerozoic)
How long in a geologic time period?
Depends on the time period. 4.54 billion years old
The ________ era was dominated by dinosaurs.
Mesozoic era (Jurassic Period)
An undisturbed sedimentary layer is _____ than the layer above, and ____ than the layer below.
older, younger
Fossils are most common in what rock types?
sedimentary rocks
What are the 3 types of rock?
the three main types of rock are sedimentary, metamorphic, and igneous
What era are we currently in at this time?
Cenozoic
The earliest forms of life occurred during the ____ era.
the pre cambrian era
Current scientific evidence shows that the Earth is estimated to be _______ years old.
4.6 billion years
List the 4 eras in order from the most recent, to the one that occurred the longest ago.
Cenozoic, mesozoic, paleozoic, precambrian
In the activity, "How do you stack Up?," describe how you were able to make the 4 geological columns. What helped you?
Other columns, colors of the layers, fossils
Use the 4 Earth Spheres to answer the following:
*bat finds shelter in caves
*we make energy by burning fossil fuels
*a farmer plowing a field to plant crops
*a meteorite is _____ to ________
*a thunderstorm is a connection betweeen?
* Biosphere and Geosphere
* Geosphere and atmosphere
* Biosphere and Geosphere
* Atmosphere to Geosphere
* hydrosphere and Atmosphere
What do you call the solid, rocky shell composing about 82% of the Earth's volume?
mantle
Which of the Earth's layers is ALL solid iron and nickel?
inner core
As you travel from the inner core of the Earth to the crust, how would temperature, density, and pressure of the material change?
They all become lower
What layer of Earth is the thickest part?
mantle
What characteristics made it easier to identify minerals? Why?
Thin sheets, magnetic, streak color
The activity simulation you embarked on in class called, "The Far Flung Fossils," helped to explain the Theory of Continental Drift using fossil evidence. Explain, using at least 3 pieces of evidence, why this activity supports this theory.
Actual movement, continental fits together like puzzle pieces, fossil evidence
What is the idea of Continental Drift and Plate Tectonics?
It was one large continent broke at the plates then became several small continents
Let's tie together our Human Impact Article Analysis with our Disaster Mapping activity. Were there any earthquakes noted in the middle of a continent or tectonic plate? Based on the article you read called, "Man Made Earthquakes," do you think this is unusual? Why or why not?
Yes in Oklahoma, it is not unusual because people are mining testing weapons and drilling for oil
A deficit in natural resources occurs when...
more resources are being used then are being produced
A surplus in natural resources occurs when... (for both of these questions think in terms of consumption and production)
Overproduction (cutting down too many trees)
Use what you learned about the 16 out of 45 countries listed in our "Natural Resources Distribution" activity that are in the Top 10 for more than one resource...to provide a possible explanation.
Well developed country
What do scientists believe is causing the Anthropocene extinction?
Human activity
Explain the differences between the Pre-Mining area drawing and Post-Mining drawing.
The Pre- Mining land was untouched post- Ming was strict and reclaimed
Explain the concept of Natural Selection.
Nature would natural select the strongest species to survive
What was so special about the Galapagos Islands and Darwin's visit there?
The Galapagos Islands were special because there were different species with differences to them. For example, the finches have different beaks for different reasons for their environments.
What do we call it when an organism completely dies out?
extinct
The gradual change in species over time is called?
evolution
What characteristic did Darwin observe about the finches on the Galapagos Islands?
Different sized beaks
What do we call a genetic difference between the organisms of the same species?
Needed to survive in their own environment
According to Darwin, and his finches, what was the advantage he could see to having different size beaks?
The advantage to having different sized beaks is that different birds could get different foods in different ways . The birds adapted to their environment and their beaks changed over time.
Why has the original fox animal species, evolved into 2 new species, the red and the silver fox, overtime?
The two different species live in two different environments.(polluted, not polluted like the moths)
When a DNA sequence is copied, sometimes mistakes occur in the new strand of DNA. What do we call these mistakes?
Mutation
Why did the population of peppered moths in England change from light to dark after the Industrial Revolution?
The color changed to dark because of the fums in the air from the Revolution.(pollution)
If you start with 48 atoms of a radioactive substance, how many would remain after one half-life? Four half-lives?
24, 3
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