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Flashcards in Earth science Deck (30):
1

What are the steps of the Scientific Method?

  1. Ask a question -- What do you want to learn
  2. State your Hypothesis -- think of a statement about what you want to test to answer your question
  3. Identify and Control Variables -- make sure you are testing only one variable at a time
  4. Test your hypothesis -- conduct your experiments
  5. Collect and Record Data -- write down all the information
  6. Interpret your data -- read over and discuss what your data means
  7. State your Conclusion -- determine if your data supports your hypothesis
  8. Go Further -- Change your hypothesis, modify your experiments, and share your data

2

What are the eight keywords to remember in the Scientific Method?

  1. question
  2. hypothesis
  3. variables
  4. test
  5. data
  6. Interpret
  7. conclusion
  8. further

3

What's the first step of the Scientific Method?

Step 1:  Ask a question -- what do you want to learn

4

What is the second step in the Scientific Method?

Step 2: State your hypothesis -- make a statement about what you want to test to answer the question

5

What is the third step in the Scientific Method?

Step 3: Identify and control variables -- make sure you are testing only one variable at a time

6

What is the fourth step in the Scientific Method?

Step 4: Test your hypothesis -- conduct your experiments

7

What is the fifth step in the Scientific Method?

Step 5: Collect and record data -- write down all of your information

8

What is the sixth step in the Scientific Method?

Step 6: Interpret your data -- read over and discuss what your data means

9

What is the seventh step in the Scientific Method?

Step 7: State your conclusion -- determine if your data supports your hypothesis

10

What is the eighth step in the Scientific Method?

Step 8: Go further -- Change your hypothesis, modify your experiments, and share your data

11


What is the Earth's crust?

The crust is the outermost solid layer.  It's where all living activity happens on Earth

12

What is the Earth's mantle?

 

The mantle is the layer of Earth beneath the crust that is liquid rock.  Most of the Earth's mass is contained in the mantle.

13

What is the Earth's core?

The core is the extremely hot innermost layer of the Earth.

14

What is the lithosphere of the Earth?

The lithosphere is the Earth's crust and the more solid upper portion of the mantle.

15

What is continental drift?

Continental drift is a theory that the continents drifted apart and continue to do so?

16

What is a theory?

A theory is a well-tested concept that explains a wide range of observations.

17

What is convection?

Convection is the process by which a material is heated, expands, becomes less dense, rises above cooler material and then sinks again once it has moved away from the heat source.

18

What materials make up the Earth's crust?

The Earth's crust is made primarily of...

  • oxygen
  • silicon
  • aluminum
  • iron
  • calcium
  • potasium
  • magnesium
  • all others

19

What are the layers of Earth?

The Earth's layers are:

  • atmosphere
  • crust
  • mantle
  • outer core
  • inner core

20

Who was Alfred Wegener?

Alfred Wegener was a German scientist, born and educated in Berlin.

21

What did Wegener suggest as a theory why the coastlines looked as if they could be fitted together?

Wegener suggested the Continental Drift Theory.

22

What is the Continental Drift Theory?

The Continental Drift Theory states that all the Earth's land masses started connected together as a single giant continent.

23

What did Wegener call the orginal continent?

Wegener called the first continent Pangea, which means "All Earth".

24

How long ago did Wegener think the continents were one land mass?

250 million years ago

25

What biological evidence supported the theory that the continents were once connected?

Plant species were remarkably similar in coastline areas which would have been connected as Pangea.

26

What further evidence did Wegener find to support his continental drift as a theory?

Wegener found that rock layers were identical in coastal areas.

27

What made Wegener's theory about the continents hard to believe?

Wegener's theory didn't point to how such enormously heavy chunk of land could be moved.

28

Which scientist explained how continental drift happens?

Arthur Holmes

29

What force causes the continents to move?

Convection

30

What is convection and how does it make the continents move?

Convection is the motion created by heated liquids, which expand and rise, and cooling liquids, which grow dense and sink.

The Earth's mantle is in motion because it is heated at the core and cooled as it contacts the crust.  The slow in motion it drives and drags the continental plates.