Our Earth Quiz #4

TENSIONAL stresses are most common along which type of plate boundary? A. Regressive B. Passive C. Divergent D. Convergent E. Transform

C

What is the resulting strain produced by SHEAR stress on a rock? A. Shortening and thickening of the rock. B. Stretching and thinning of the rock. C. Tearing of the rock. D. Change in volume of the rock E. Rounding of the rock.

C

Which of the following is the largest geologic time unit? A. Period B. Era C. Eon D. Epoch E. Age

C

Which of these would likely produce the most reliable absolute age of formation from radiometric dating techniques? A. High-grade metamorphic rock B. Low-grade metamorphic rock C. Igneous rock D. Clastic sedimentary rock E. Chemical sedimentary rock F. Sediments

C

An example of TRACE fossils: SELECT ALL THAT APPLY A. fossilized shells B. fossilized bones C. dinosaur footprint D. Fossil poop (coprolites) E. worm trails F. fossilized seeds

C, D, E

COMPRESSIONAL stresses are most common along which type of plate boundary? A. Regressive B. Passive C. Divergent D. Convergent E. Transform

D

In stratigraphy, the principle of stratigraphic superposition states that: A. all sedimentary beds start off being horizontal B. all sedimentary beds are separated by bedding planes C. a sedimentary bed is younger than the bed above it and older than the bed below it D. a sedimentary bed is older than the bed above it and younger than the bed below it E. a sedimentary bed must be older than any feature that cuts through it or disrupts it F. a sedimentary bed is younger than any adjacent igneous rock

D

On the early earth, much of the atmospheric oxygen came from _____. A. Increased respiration from animals B. Volcanic eruptions C. Evaporation of water D. Photosynthetic bacteria E. Meteorite impacts F. Glaciers

D

What is the resulting strain in DUCTILE deformation? A. recoverable change in shape B. temporary change in shape C. flowing back into original shape D. permanent change in shape E. fracturing change in shape F. No change

D

What is the resulting strain in PLASTIC deformation? A. recoverable change in shape B. temporary change in shape C. flowing back into original shape D. permanent change in shape E. fracturing change in shape F. No change

D

SHEAR stresses are most common along which type of plate boundary? A. Regressive B. Passive C. Divergent D. Convergent E. Transform

E

What is the resulting strain in BRITTLE deformation? A. recoverable change in shape B. temporary change in shape C. flowing D. bending E. fracturing change in shape F. No change

E

The epoch that we currently live in is called the: A. You cannot check the answer to this question on this Answer Checker. B. You cannot check the answer to this question on this Answer Checker.

Holocene Epoch

What materials were dated to determine the age of the Earth? A. You cannot check the answer to this question on this Answer Checker. B. You cannot check the answer to this question on this Answer Checker.

Meteorites

If we see a sedimentary bed that has a fault cutting through it as well as a dike that cuts through both the bed and the fault, we can use the principle of cross-cutting relationships to infer: A. the bed formed first, then the fault, then the dike B. the bed formed first, then the dike, then the fault C. the fault formed first, then the bed, then the dike D. the fault formed first, then the dike, then the bed E. the dike formed first, then the bed, then the fault F. the dike formed first, then the fault, then the bed

A

Increasing rock strength results in what type of strain? A. brittle B. expansion C. ductile D. shear E. elastic F. recoverable

A

Increasing strain rate results in what type of strain? A. brittle B. expansion C. ductile D. shear E. elastic F. recoverable

A

What is the resulting strain produced by COMPRESSIONAL stress on a rock? A. Shortening and thickening of the rock. B. Stretching and thinning of the rock. C. Tearing of the rock. D. Change in volume of the rock E. Rounding of the rock.

A

Why are fossils so uncommon in older rocks? A. Life had not developed hard body parts yet B. Early organisms were so small that the fossils are hardly discovered C. Fossilized early organisms resemble mineral grains D. The older rocks that include fossils are too deep in the crust to collect and study E. Early organisms were not widespread enough to be found

A

Why is the mineral zircon good for absolute dating? SELECT ALL THAT APPLY A. It is durable B. It contains uranium C. It reacts easily D. It contains potassium E. It forms in all igneous rocks F. It is widespread.

A, B

What important evolutionary advances occurred in the Paleozoic? SELECT ALL THAT APPLY A. First jawed fish B. First land animals C. First trees D. First mammals E. First soft-bodied animals F. First dinosaurs

A, B, C

About 540 million years ago, _____. SELECT ALL THAT APPLY A. The Proterozoic ended B. The Precambrian ended C. The Paleozoic began D. The Phanerozoic began E. The Paleogene began

A, B, C, D

Which of the following statements about radioactivity is FALSE? SELECT ALL THAT APPLY A. radioactive dating is a technique of relative dating B. all isotopes of an element have the same number of neutrons and different numbers of protons C. in radioactive decay, daughter isotopes turn into parent isotopes D. all isotopes of an element have the potential to undergo radioactive decay E. the amount of parent isotopes is always increasing F. all available atoms of an unstable isotope will fully decay after two half-lives

A, B, C, D, E, F

What made the Cambrian Explosion "experimental" from an evolutionary point of view? SELECT THREE A. Many lineages were made and went extinct, with almost no ancestors past the Cambrian B. Many lineages that exist today were formed at that time C. Animals began changing the environmental chemistry around them D. The new invention of hard parts spurred new uses for animals E. Animals first began to feed on each other F. The first plants with photosynthesis evolved

A, B, D

Which of the following are possible sources of Earth's water? SELECT THREE A. Volcanism B. Comets C. Sun D. Meteorites E. Empty space F. Moon

A, B, D

A rock stratum is tiled noticeably from horizontal. What is the most reasonable conclusion you can draw? A. The stratum was deposited on the angle of the continental slope B. A tectonic event has occurred in the area since deposition of the stratum C. A meteorite struck that region, and the stratum is bowed up near the margin of the crater D. A volcano punched through the region deforming the stratum E. The layers have slowly rotated as the ground around them has been compressed with lithification F. Erosion removed the base strata, tilting the overlying strata

B

If the half-life of an isotope is 1 million years, and 100 of the isotopes are in an igneous rock when it first forms, how old will the rock be when there are only 25 of these isotopes left in the crystal? (If this question is on the exam, some numerical values will be modified, but they remain as simple so that you do not need a calculator.) A. 1 million years old B. 2 million years old C. 3 million years old D. 4 million years old E. 5 million years old F. 25 million years old

B

If we see a sedimentary bed that has a dike cutting through it as well as a fault that cuts through both the bed and the dike, we can use the principle of cross-cutting relationships to infer: A. the bed formed first, then the fault, then the dike B. the bed formed first, then the dike, then the fault C. the fault formed first, then the bed, then the dike D. the fault formed first, then the dike, then the bed E. the dike formed first, then the bed, then the fault F. the dike formed first, then the fault, then the bed

B

Increasing temperature results in what type of strain? A. brittle B. ductile C. shear D. elastic E. recoverable F. fracturing

B

What is the resulting strain produced by TENSIONAL stress on a rock? A. Shortening and thickening of the rock. B. Stretching and thinning of the rock. C. Tearing of the rock. D. Change in volume of the rock E. Rounding of the rock

B