Question

part 4: local geology connection

1. what type of rocks are the granite dells made of?
2. why is arizona a good place to study geology?

part 5: weathering & erosion mini - lab reflection
think back to our chalk - sugar cube and vinegar - sandpaper labs.

1. which process showed chemical weathering?
2. which showed mechanical weathering?
3. which type of weathering do you think changes rocks the fastest in nature? why?

part 6: multiple choice
circle the correct answer.

1. which rock type often contains fossils?

a) igneous b) sedimentary c) metamorphic d) crystal

1. which cave feature “grows from the ceiling down”?

a) stalagmite b) stalactite c) column d) drip

Explanation:

1. Granite is an igneous rock formed from the cooling and solidification of magma.
2. Arizona has diverse geological formations like the Grand Canyon, various rock - types, and active geological processes such as erosion, making it ideal for geology study.
3. In the chalk - sugar cube and vinegar - sandpaper labs, the reaction between vinegar and substances likely showed chemical weathering as vinegar is acidic and can react with minerals in rocks.
4. The sandpaper action on materials likely showed mechanical weathering as it physically breaks down the materials through abrasion.
5. Chemical weathering can be fast in some cases like in areas with high acid - rain or near volcanic regions as chemical reactions can quickly dissolve minerals. But in general, mechanical weathering by processes like frost - wedging can be rapid in cold climates as the repeated expansion and contraction of water can break rocks quickly.
6. Sedimentary rocks often contain fossils as they are formed from the accumulation and compaction of sediments where organisms can be trapped.
7. Stalactites grow from the ceiling of a cave downwards.

Answer:

1. Igneous rocks.
2. It has diverse geological formations, rock - types, and active geological processes.
3. The vinegar - related process in the lab.
4. The sandpaper - related process in the lab.
5. Answers may vary. Chemical weathering in acidic environments or mechanical weathering by frost - wedging in cold areas can be fast. Reasons as explained above.
6. b) Sedimentary
7. a) Stalactite