A scientist at a canyon notices observes a dike cuts across the sedimentary layers. How did it get there?
A) It was there before the layers; the layers built upon above and beneath it over millions of years.
B) There was an earthquake a layer of igneous rock was thrust into the sedimentary layers..
C) Magma rose from within the earth and intruded the sedimentary layers.
D) A piece of a volcano broke off beneath the earth..
Question 2
In which ways does pressure influence different rock compositions' melting points?
A) the more pressure, the higher the melting point
B) the more pressure, the lower the melting point
C) pressure changes the composition of the rock, raising the melting point
D) pressure changes the composition of the rock, lowering the melting point
Glass pedestrian bridge in Zhangjiajie’s Grand Canyon, China
Thermal Layers of the Atmosphere
Soil layers known as horizons "طبقات التربة المعروفة آفاق"
The Ocean’s Layers
Florometra Crinoid or Feather Star, Phylum Echinodermata. Monterey Canyon, California.
Derivatives of Vertebrate Germ Layers