Erratic Boulders - Rafted in Icebergs by the Ice Age
Floods
Quantitative Reading Level:
This video would be suitable for
grades 5 and up.
Qualitative Reading Analysis:
I would rate this as Middle High on the “Text Complexity:
Qualitative Measures Rubric for Informational Text”. Although it is not a text the features of the
video can be used to rate the material.
Even though the video is short the narrator does use academic language
in describing the erratic boulders and how they moved to their current
location. Students would need some
content knowledge in order to understand the video.
Summary:
This video
is part of the YouTube Channel “2 Minute Geology” from HUGEFloods.com. In
this particular episode the host talks about erratic boulders. Erratic boulders are large rocks that are
different from the surrounding rock in both composition and size. Many erratic boulders are left behind from
moving glaciers. The ones in this video
however floated on top of icebergs and then either fell off or the iceberg
melted leaving them stranded. The
narrator explains how the erratic boulders arrived at their location and shows
many erratic boulders in Washington State.
Content Area: Science - geology
Content area standard:
Knows the
major characteristics of each layer (composition, thickness, physical state,
and temperature) and why they are different.
Curriculum Suggestions:
This short
video and others in the 2 Minute Geology series could be shown during a study
of “Earth’s Changing Surfaces” (what my district calls this unit of study in 5th
grade). It could be used as a discussion
starter or to tie in with what is being discussed. Although the series focuses on features in
Washington State students in Maine could be encouraged to find similar example
in their own state.
Personal Thoughts:
This was a
really interesting video. It was short
and sweet with just enough information to get students’ interest but not so
much as to bore them. The narrator was a
bit “geeky” but students would probably find him humorous. The information was scientific without being
too heavy.
High Interest Annotation: How did those “erratic” boulders get
there anyway?
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