Question

movie
watch the movie to learn how scientists study rock strata to make a timeline of earth’s history. as you watch, record any observations that help you answer the guiding question.
1 according to the movie, how do rock strata form?
a gravity causes sediment to settle in layers
b earthquakes create large slices in existing rock
c layers are pushed upward from earth’s core
d changes in air pressure push rocks downward

Explanation:

Rock strata (sedimentary rock layers) form when sediment (like sand, mud, or small rock fragments) is deposited and settles over time, with gravity pulling the sediment downward to form distinct, horizontal layers. Earthquakes disrupt existing layers, upward pushing from the core affects metamorphic/igneous rock processes, and air pressure does not drive strata formation.

Answer:

A. Gravity causes sediment to settle in layers