Earth Science (STEM)

What type of rocks are formed from sediments over long period of time?

• Igneous Rocks

• Sedimentary Rocks

• Metamorphic Rocks

• Mineral

Metamorphic rocks can only form from preexisting rocks.

• True
• False

Which of the following represents the correct order of the processes responsible for the formation of sedimentary rocks?

• Erosion, weathering, compaction, cementation, deposition

• Compaction, cementation, deposition, weathering, erosion

• Deposition, cementation, compaction, erosion, weathering

• Weathering, erosion, deposition, compaction, cementation

All volcanic rocks are also igneous rocks.

• True
• False

What evidence do sedimentary rocks provide about past environments?

• They have a crystalline structure

• They contain fossils and layers.

• They are formed from molten material.

• They are formed under high pressure and temperature.

Extrusive/Volcanic rock forms when magma makes its way to Earth’s surface as lava and then cools. The crystals are very small (fine-grained) since the cooling process is fast.

• True
• False

What is the process of extracting minerals from a rock seam or ore?

• Refining

• Mining

• Sampling

• Concentration

Which of the following is a mineral ore?

• a rock with fossilized insect

• a rock combined with copper

• a sediment that has gold traces

• a rock that contains valuable mineral

Chromite miners in the Philippines use drill or explosive to bore hole in the ground to extract the mineral deposits. Which mining method did the miners use

• Dredging

• Open-pit mining

• Strip mining

• Underground mining

Underground mining is the process of mining materials from the bottom of a body of water, including rivers, lakes, and oceans.

• True
• False