أوراق عمل Development of a Theory مع الحل العلوم منهج انجليزي الصف الثامن
Answer Key with Questions
Lesson Check: Development ofa Theory
As new seafloor moves away from an ocean ridge, the seafloor cools and becomes less dense than the material beneath it
O True
O False
Correct Answer
False
The youngest rocks on the ocean floor are located
O A) near continents
O B) at mid-ocean ridges
O C) far from mid-ocean ridges
O D) near Asia
Correct Answer
B) at mid- ocean ridges
Answer Key with Questions
Lesson Check: Development of a Theory
Which Of the following best explains the age Of oceanic crust and ocean - floor features
O A) seafloor spreading
O B) continental drift
C) C) subduction
C) D) crystallization
Correct Answer
A) seafloor spreading
New ocean crust is continually formed at
O A) mid - ocean ridges
O B) trenches
O C) subduction zones
O D) ocean basins
Correct Answer
A) mid - ocean ridges
5) The theory Of ridges
Correct Answer
seafloor spreading
Answer Key with Questions
Lesson Check: Development of a Theory
What new technology was used to map the seafloor beginning in the 1940s and 1950s
Correct Answer
Answers may vary
Explanation
sound waves on moving ships
Answer Key with Questions
Lesson Check: Development of a Theory
7) How does a mid-ocean ridge form
Correct Answer
Answers may vary
Expla nation
As the seafloor spreads apart. magma moves upward and flows from the cracks. It becomes solid as it cools and forms new seafloor As new seafloor moves away from the ridge, it cools. contracts. and becomes denser than the material below it. This dense. colder seafloor begins to sink. helping to form the mid-ocean ridge
Answer Key with Questions
Check: Development of a Theory
The map shows the of rXks found on the Atlantic Ocean Ars Ot Rocks Atlantic Ocean
a. Identify the that causes the of rcxk data shown in the map
b. Explain how the provides evidence for the you identified in (a)
Answer Key with Questions
Leswn Check: Development of a Theory
Correct Answer
Answers may vary
Expla nation
a. Plate tectonics or
b. New ocean crust is made at the rift zone (or ridge). As more crust builds up at the center Of the it pushes away the Older crust toward the continents. This process happens slowly over millions of years. creating a pattem of crust that gets older the farther away it is from the ridge
[Note: Student may also discuss that the pattern records in nwletic Of the oceanic crust. The different colored pattern is also used to show matching reversals in magnetic polarity Of the rcxks on either side Of the ridge
Evidence of Understanding
Student response provides clear evidence of using the dimensions' to make sense of scientific phenomena and/or to design solubons to problems. Student is able to identify the process that causes the pattem of rock data shown in the map
AND
explain how the pattern provides evidence for the process identified in part (a)
Student response provides partial evidence using the dimensions• to make sense of saentific phenomena and / or to design solutions to problems. The response lacks some critical information and details or contains some errors Student is able to
identify the process that causes the pattem of rock data shown in the map
BUT
is unable to explain how the pattem provides evidence for the processو identified in part (a)
Student response is incomplete or provides minimal evidence of using the dimensions' to make sense of scientific phenanena and / or to design solutions to
problems
Student does not respond or student response is inacarate, irrelevant, or contains insuffaent evideme of the dimelsicns• to make sense of saentlfic andicr to sdutons to problems
Scoring Notes
Possue answs
a. Ptäe tecbnics
b. New ocem crust is at he rift (or mid-ocean ri). As nue crust builds up at center ot it away older crust toward the cmtinents. This process slowy rMims a gnttern Of crust that gets Older tie rttEr away it is
(Note: may &scuss hat tte pattern record chæves pdarity he aust Tile different is dso used to show reversals in pomty Of rocks