Oxygen-isotope data has a pattern that led scientists to examine ...

[dollx]

Oxygen-isotope data has a pattern that led scientists to examine which other type of data in a search for the cause of ice ages?
 
  A) rock-isotope data
  B) planetary-movement data
  C) continental-movement data
  D) sun-activity data

Question 2

Ripples in sand caused by elliptical wave motion tend to
 
  A) slope toward the shore.
  B) slope away from the shore more steeply than toward the shore.
  C) slope irregularly depending on the current.
  D) slope equally away from the shore and toward the shore.

[sailorcrescent]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: D