Question

name earth - systems and cycles study guide 25. which is not a true statement? a. regional metamorphism refers to rocks that are deformed and heated simultaneously where active mountain - building is happening b. regional metamorphism is the least common type of metamorphism because it involves large - scale regional areas where mountain - building has occurred. c. if you find a regional metamorphic rock such as gneiss, the sample will likely be foliated 26. which is not a true statement? a. limestone rock contains a substantial amount of carbon dioxide gas. b. atmospheric carbon dioxide dissolves in seawater and combines with dissolved calcium to form limestone c. the formation of limestone neither removes nor adds carbon dioxide from the sea and air d. when limestone is used to make cement, carbon dioxide gas is released back to the atmosphere. 27. in which of earths layers would you expect a volcanic eruption like the 1980 mount st. helens eruption to occur? a. crust b. uppermost mantle c. lower mantle d. outer core e. inner core 28. which is a result of james huttons studies of sandstone? a. he concluded that sand grains are about the same age as human history because sandstone weathers and produces sand grains within a human lifespan. b. he recognized that the sandstone in the scottish highlands was rapidly weathering and changing. c. he noted that weathered sand grains carried by streams to the scottish lowlands almost immediately formed new layers of sandstone. d. he determined that the sand in sandstone came from the weathering of cliffs and mountains that formed prior to the start of modern human history. 29. which is not a true statement? a. the igneous rocks that form after a volcanic eruption are plutonic rocks. b. volcanic igneous rocks form when magma reaches earths surface and cools. c. plutonic igneous rocks form when magma cools and crystallizes inside earth and does not get deposited as lava on the surface. d. lava cools off in a few days or a few years unless it comes in contact with cold water or ice where it may cool off in hours. 30. which is not a true statement about rocks? a. soil is an example of rocks because it is unconsolidated aggregate of materials. b. if you pick up a rock, it will be considered a rock if it is made up of one or more minerals. c. igneous rocks form a few hundred kilometers beneath the surface where high enough temperatures melt rock into magma. d. magma rises slowly towards earths surface because it is less dense than the surrounding rock. copyright cengage learning. powered by cognero

Explanation:

1. Regional metamorphism is not the least common type.
2. Formation of limestone involves carbon - dioxide exchange.
3. Volcanic eruptions occur in Earth's crust.
4. Hutton noted sandstone origin from weathered cliffs/mountains.
5. Plutonic rocks form inside Earth, not after surface eruption.
6. Soil is not a rock; rocks are made of minerals.

Answer:

1. b
2. c
3. a
4. c
5. c
6. a