A Trip Through Geologic Time

Question 0

What is sedimentary rock

Answer 0

The type of rock this is made of hardened sediment.

Question 1

Fossils in which minerals replace all or part of an organism are called?

Answer 1

Petrified fossil

Question 2

What are the preserved remains or traces from a living thing?

Answer 2

Fossil

Question 3

________is the process by which all living things change over time

Answer 3

Evolution

Question 4

When a species no longer exists on Earth, we call it _________.

Answer 4

Extinct

Question 5

What is a paleontologist?

Answer 5

A scientist who studies fossils.

Question 6

What provides evidence of the activities of ancient organisms?

Answer 6

Trace fossils

Question 7

What is a mold?

Answer 7

A Hollow area in sediment in the shape of an organism or part.

Question 8

Organisms with little or no change

Answer 8

Preserved remains

Question 9

What is a cast

Answer 9

A cast is a solid copy of the shape of an organism. A cast is the opposite of a mold.

Question 10

A scientific theory is……..

Answer 10

A well-tested concept that explains a wide range of observations

Question 11

What is a petrified fossil?

Answer 11

They are fossils in which minerals replace part or all of an organism.

Question 12

What is an extremely thin coating of carbon on rock?

Answer 12

Carbon film

Question 13

What is law of superposition?

Answer 13

The law of superposition is used by geologists to determine the relative ages of sedimentary rock layers.

Question 14

_______ ____ is the age of a rock given as the number of years since it was made.

Answer 14

Absolute age

Question 15

The surface where new rock layers meet a much older rock surface beneath them is called an __________

Answer 15

Unconformity

Question 16

An _______ is always younger than the rock layers around and beneath it.

Answer 16

Intrusion

Beneath the surface, magma may push into bodies of rock. There, the magma cools and hardens into mass of igneous rock called intrusion.

Question 17

What is the relative age of a rock?

Answer 17

The age of a rock compared to the ages of other rocks.

Question 18

A _____ is a break in Earth’s crust.

Answer 18

Fault

Question 19

The Mesozoic ___ is the Age of Reptiles.

Answer 19

Era

One of the three long units of geologic time between the Precambrian and the present.

Question 20

Eras are subdivided into units of geologic time called _______.

Answer 20

Periods

Question 21

The process where elements break down or decay by releasing particles or energy is called?

Answer 21

Radioactive decay

Question 22

What is a geologic time scale?

Answer 22

A geologic timescale is a scale of time periods to show Earth’s history.

Question 23

_______ create all mater including rocks

Answer 23

Atoms

Atoms create all matter including rocks

Question 24

Certain fossils, called _____ ______, help geologists match rock layers.

Answer 24

Index Fossils

To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed only briefly.

Question 25

What is a half-life?

Answer 25

The rate of each radioactive element’s decay.

Question 26

What is extrusion?

Answer 26

Extrusion is lava that hardens on the surface.

Question 27

What is a warm-blooded vertebrate that feeds it’s young with milk?

Answer 27

Mammal

Question 28

What has scaly skin, lays eggs with tough, leathery shells?

Answer 28

Reptiles.

Question 29

What is a ball of dust and ice that orbits the sun?

Answer 29

Comet

The ice in a comet consists of water and frozen gases, including Carbon Dioxide.

Question 30

_________ _________ moves a few centimeters per year.

Answer 30

Continental drift