The relative age of a rock is

It's age compared to other rocks.

Why do some sceintist think that embryo development is evidence for evolution?

Species in the same Class often have similar embryos.

The law of superposition states that, in horizontal layers of sedimentary rocks, each layer is

Older than the layer on top and younger than the one below.

Radioactive decay occurs when atoms of an unstable element

Break down to form atoms of another element.

The preserved remains or traces of an organism.

How can the pictured skeletal features help support the theory of evolution?

Shared skeletal features may indicate a common ancestor.

The geological time scale is a record of

The life forms and geologic events in Earth's history.

The fossil record shows life on Earth has changed over time. Older rocks contain fossils of

Organisms that are simpiler than those alive today.

What does the above picture of embryos provide evidence of?

Similar appearance could indicate a shared ancestor.

How do most fossils form?

An organism dies and becomes buried by sediments.

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Geologic Time Review

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#8th grade Earth Science

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Questions 20

Answers

1
A type of organism that no longer exists on Earth is said to be
Sedimentary
Extinct
Fossilized
Petrified
2
The relative age of a rock is
The number of years since the rocks formed.
It's age compared to other rocks.
Based on the amount of carbon-14 the rock contains.
Less than the age of the fossils the rock contains.
3
Why do some sceintist think that embryo development is evidence for evolution?
All embryos look exactly the same in their earliest stages
Embryos evolve into the organism that best suits their home.
Species in the same Class often have similar embryos.
4
The law of superposition states that, in horizontal layers of sedimentary rocks, each layer is
Neither older nor younger than the other layers
Younger than the layer above it
Always older than any vertical layer.
Older than the layer on top and younger than the one below.
5
The process by which natural forces move weathered rock and soil from one place to another is
Abrasion
Deposition
Soil conservation
Erosion
6
Which type of fossil can provide clues about the activities of ancient organisms?
Carbon films
Remains preserved in amber
Molds and casts
Trace fossils
7
Radioactive Dating works best with what type of rocks?
Igneous rocks
Metamorphic rocks
Sedimentary rocks
Fossilized rocks
8
Radioactive decay occurs when atoms of an unstable element
Break down to form atoms of another element.
Are exposed to chemical weathering.
Join with atoms of another element
Become part of a fossil
9
Which type of fossil might you find the remains of an insect preserved with little to no change
Mold
Trace fossil
Amber
Replacement fossil
10
The process by which all different kinds of living things have changed over time is called?
Replacement
Deposition
Evolution
Sedimentation
11
What is a fossil?
An unusual type of rock.
Any dead organism.
The preserved remains or traces of an organism.
A perfect copy of a rock.
12
What kind of weathering causes the mineral composition of rocks to change?
general weathering
permeable weathering
chemical weathering
mechanical weathering
13
How can the pictured skeletal features help support the theory of evolution?
Whales came out of the water and evolved into bats, etc..
Human arms evolve into wings and flippers so they can fly ..
Shared skeletal features may indicate a common ancestor.
All mammals are the same species
14
Ice wedging causes mechanical weathering by means of
Heating and cooling
Plant growth
Freezing and thawing of water
Animal actions
15
The Mesozoic era is divided into the Triassic, Jurassic, and Creteaceous. Theses are called?
Unconformities
Decades
Periods
Eras
16
The geological time scale is a record of
The thickness of sedimentary rock layers
The life forms and geologic events in Earth's history.
The since the evolution of dinosaurs.
The rate of fossil formation
17
The fossil record shows life on Earth has changed over time. Older rocks contain fossils of
Both simple and complex organisms
Only organisms that are alive today
Organisms that are simpiler than those alive today.
Organisms that are more complex than those alive to today
18
What does the above picture of embryos provide evidence of?
Humans develop exactly like turtles.
The look the same because the feed off of one another.
Fish, amphibians, reptiles, and mammals are all the same.
Similar appearance could indicate a shared ancestor.
19
How do most fossils form?
Freezing preserves the remains of an organism.
The hard parts of an organism dries out in the air.
The soft parts of an organism change to stone.
An organism dies and becomes buried by sediments.
20
The time it takes for half of the radioactive atoms in an isotope to decay is called
Potassium-argon date. (K-Ar)
Half-life
Relative age
Absolute age

Geologic Time Review Flashcards | StudBud