4th quarter exam (Gen Bio II)

Question 1

word “petrified” means

Answer 1

Turning into stone

Question 2

Five main types of fossils

Answer 2

petrified fossils, molds and casts, carbon films, trace fossils, preserved remains

Question 3

form when minerals replace all or part of an organism.

Answer 3

petrified fossils

Question 4

Water is full of dissolved minerals. It seeps through the layers of sediment to reach the dead organism. When the water evaporates, only the hardened minerals are left behind.

Answer 4

True

Question 5

forms when hard parts of an organism are buried in sediment, such as sand, silt, or clay.

Answer 5

mold

Question 6

forms as the result of a mold.

Answer 6

cast

Question 7

All living things contain an element called

Answer 7

carbon

Question 8

When an organism dies and is buried in sediment, the materials that makeup the organism breakdown. Eventually, only carbon remains

Answer 8

true

Question 9

show the activities oforganisms.

Answer 9

trace fossils

Question 10

Over time the footprint is buried in layers of sediment. Then, the sediment becomes solid rock.

Answer 10

true

Question 11

Some organisms get preserved in or close to their original states.

Answer 11

Preserved remains

Question 12

An organism, such as an insect, is trapped in a tree’s sticky resin and dies. More resin covers it, sealing the insect inside .It hardens into

Answer 12

Amber

Question 13

An organism, such as a mammoth, is trapped in a pit and dies. The sinks into its bones and stops the bones from decaying.

Answer 13

Tar

Question 14

An organism, such as woolly mammoth, dies in a very cold region. its body is frozen in, which preserves the organism-even
its hair

Answer 14

Ice

Question 15

An animal is buried by, such as volcanic ash or silt, shortly after it dies. Its bones are protected from rotting by the layer of

Answer 15

Sediment

Question 16

More sediment accumulate above the animal’s remains, and minerals, such as silica (a compound of silicon and oxygen), slowly replace the calcium phosphate in the bones

Answer 16

Layers

Question 17

of tectonic plates, or giant rock slabs that make up Earth’s surface, lifts up the sediments and pushes the fossil closer to the fossil

Answer 17

Movement

Question 18

from rain, rivers and wind wears away the remaining rock layers. Eventually, or people digging for fossils will expose the preserved remains.

Answer 18

Erosion

Question 19

(fossils can form in several ways)
occurs when minerals carried by water are deposited around a hard structure.

Answer 19

Permineralization

Question 20

(fossils can form in several ways)
forms when flowing water removes all of the original tissue, leaving an impression.

Answer 20

natural cast

Question 21

(fossils can form in several ways) record the activity of an organism.

Answer 21

trace fossils

Question 22

(fossils can form in several ways) fossils are organisms t h a t become trapped in tree resin that hardens after the tree is buried.

Answer 22

Amber-preserved

Question 23

(fossils can form in several ways) form when an entire organism becomes encased in material such as ice.

Answer 23

Preserved remains

Question 24

(fossils can form in several ways)
• Specific conditions are needed for fossilization.
• Only a tiny percentage of living things became fossils.

Answer 24

true

Question 25

are evidences of organisms that lived in the past. They can be actual remains like bones, teeth, shells, leaves, seeds, spores or traces of past activities such as animal burrows, nest and dinosaur footprint or even the ripples created on a prehistoric shore.

Answer 25

Fossil