3. Alfred Wegener discovered that there are similar mountain ranges on both sides of the Atlantic Ocean. An example of this is the Appalachian Mountains that disappear off the
coast of Newfoundland and the mountains that are found in the British Isles. These
mountain ranges are similar in age and composition. This information helped Alfred
Wegener form his theory of -
a. Continental drift
b. Sea floor spreading
c. Glacial impact
d. Global warming

Identify which properties could correspond to solids, plasmas, or both. maintain a unique shape. collide infrequently with other particles. have very high velocities. conduct electricity. protons. have a low temperature. has long-range order.

What is impossible to do with a hypothesis

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size