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Lesson 12 Impact Craters & Procedure Writing
Impact Craters and How to write a procedure for investigations
16
Science
8th Grade
12/12/2012

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Cards

Term
How many trials should you have in an investigation?
Definition
three
Term
If an impact crater has a lot of debris around it that had been melted, you could conclude that .....
Definition
the impacting object was moving very fast.
Term
Name the variable in an investigation that is being changed.
Definition
Manipulated Variable
Term
List some things that affect the appearance of a crater.
Definition

Size of impacting object

Speed of impacting object

Angle of impact

Surface type that is impacted.

Term
What is the name for variables that are kept the same?
Definition
Controlled Variable
Term
Older surfaces on terrestial objects generally contain ____________   craters.
Definition
more
Term
List the features of an impact crater.
Definition

rim

rays

central peak

Term
Which phase of Earth's moon is the best time to study craters as seen from Earth?
Definition

Quarter Phase

(increases shadows in craters, revealing more detail)

Term
You must label what two variables in all data tables?
Definition
Manipulated and Responding
Term

The Earth was heavily cratered during its formation.  Today, about 120 impact craters have been identified.  Why are there so few compared to other bodies in the solar system?

 

Definition


Many craters on Earth have been eroded by wind and water and destroyed by tectonics and volcanism.



Term
What causes rays to form around an impact crater?
Definition
Rays are fromed by ejected materials, like dust, sand, and liquid rock falling back around the crater after impact.
Term

Name the variable in an investigation that is measured.

 

Definition
Responding Variable
Term

When writing a procedure for an investigation, you need to state that measurements need to be ______________

in a data table.

Definition
recorded
Term
Describe the typical shape of an impact crater.
Definition
large bowl-shaped hole
Term
What is the most common geological feature in the solar system?
Definition

Impact Craters

 

Term
If you have 3 trials in your data table, than you also need a column for finding the ______________.
Definition
average
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