Sedimentary Rocks Quiz

What is the primary process by which sedimentary rocks are formed?

• Cooling and solidification of magma
• Compaction and cementation of sediments
• Melting and recrystallization
• Erosion and deposition

How are sediments classified?

• By their chemical composition
• By their color
• By their size
• By their age

Which of the following is NOT a size category for sediments?

• Clay
• Silt
• Pebbles
• Gravel

What distinguishes breccia from conglomerate?

• The size of the sediments
• The mineral composition
• The shape of the sediments
• The color of the rock

Which type of sedimentary rock is formed from organic matter?

• Clastic
• Crystalline
• Bioclastic
• Igneous

What is the main difference between evaporites and precipitates?

• Evaporites form from evaporation, precipitates do not
• Precipitates form from evaporation, evaporites do not
• Both form from evaporation
• Neither involves chemical processes

Which sedimentary rock is known to form from the evaporation of seawater?

• Sandstone
• Shale
• Rock salt
• Limestone

Why are sedimentary rocks the only type to commonly contain fossils?

• They form under low pressure
• They form under low heat
• They form without destroying organic material
• They form from volcanic activity

What is the size range for sand particles according to the Earth Science Reference Tables?

• 0.002 cm to 0.05 cm
• 0.006 cm to 0.2 cm
• 0.2 cm to 0.6 cm
• 0.6 cm to 2.5 cm

Which type of sedimentary rock is composed of angular, pointy sediments of various sizes?

• Conglomerate
• Breccia
• Sandstone
• Shale