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6th grade Science Unit 3 Pretest — 20 Questions
Armstrong, Kennedee

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Question 18.



Janice and James are studying a rock formation near their school. They are specifically looking for the processes of physical weathering.

When examining the rock and the environment for physical weathering, what types of things should they look for?


the formation of clay minerals, leaching, and animal activity in the area


the presence of lichens, various types of crystals, and fossils


the formation of salt crystals, fractures in the rock, and seasonal temperature fluctuations


the presence of different minerals on the surface, various colors, and plant roots

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GPT-5 mini
the formation of salt crystals, fractures in the rock, and seasonal temperature fluctuations

These are all physical (mechanical) weathering processes: salt crystal growth and expansion, physical fracturing, and repeated heating/cooling (thermal expansion and freeze–thaw) break rock apart without changing its chemical composition.

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