Fossils, WIS 7th grade chemistry

What are fossils?

• pathways or shelters made by animals

• are the trace or remains of an organism

• animals that lived in the past

• fossilized structure that formed in sedimentary rock by animal activity

when an organism dies....

• only gets decomposed

• states that geological processes happened the place it died

• starts to decay or get eaten by other organisms

• petrification occurs to the organism

What is in the picture, and what caused that to the insect?

• its an insect stuck in amber, the insect got inside the tree sap and the amber hardened by time

• trace fossil, from dinosaures

• frozen insect, from low temperatures

• its an insect trapped in asphalt, people poured asphalt on the insect

Scientists had shown that earth is about____years old.

Answer explanation

Because geologic processes tend to happen at a slow rate, which means that earth is very old!

Scientists found a mammoth head in serbia that still had its flesh. How is that possible?

• minerals replaced the tissues of the organism due to water

• hard parts or organisms do not break down easily

• because the mammoth was large and couldn't break down

• in very cold areas on earth, the soil can be frozen all the time, which leads to slow decomposition

uniformitarianism is the trace of animals footprints or coprolites

• true

• false

Answer explanation

uniformitarianism states the geological processes that happened in the past and can be explained by current geologic processes

trace fossil is a fossilized structure that formed in sedimentary rock by animal activity on or in soft sediment

• true

• false

What are the kinds of trace fossils?

• shelters made by animals

• burrows

• petrified wood logs

• coprolite

• hard rock

all the fossils that are discovered on earth are called...

• fossil core

• fossil cycle

• fossil record

• fossil collection

• still the same

every organism leaves behind fossils

• true

• false