Precambrian Quiz 1

1.

1 point

Since orogens have long ago eroded what did the continents later form?

Microcontinents

Laurentia

Pangea

Precambrian shield

2.

1 point

What Occured during the time of Rodinia?

Pangea was made

Earth began to spin on its axis

Earth’s oceans and atmosphere were formed

Dinosours roamed the Earth

3.

1 point

The process by which a planet becomes internally zoned when heavy materials sink toward its center and lighter materials accumulate near its surface

Divination

Differentiation

Circumduction

Assimilation

4.

1 point

The first 4 billion years most life forms were...

Aquatic creatures

Dinosours

Single-celled organisms

amphibians

5.

3 points

What were the 3 sources of Earth's heat?

Gravitational contraction

Magma

Collision of meteorites

Radioactive isotopes

Sun

6.

1 point

North America the Precambrian shield is called?

Continental Shield

US Shield

Northern Shield

Canadian Shield

7.

1 point

What is the Precambrian shield made of?

Archean and Proterozoic rock

Fossilitic rock

Igneous like sediments

Zirconic rock

8.

1 point

How much of Laurentia is left in North America today?

75%

50%

none it was all recycled

All of it that why we have land today

9.

1 point

Whare are places where they collided and fused together?

Orogens

Zircon

Microcontinents

islands

10.

1 point

What is Zircon?

a mineral that made metamorphic rock

is a very stable mineral that commonly occurs in small amounts in granite

the first igneuos rock

rock responsible for our first continent

11.

1 point

How old is Earth?

4.6 billion years old

5 million years old

2.5 billion years old

3.8 billion years old

12.

1 point

What are Microcontinents responsible for?

they are the 7 continents we have today

Creating the Precambrian shield

They are responsibe for the islands we have today

They helped break the Precambrian shield

13.

1 point

How are rocks useful?

To find evidence of life on Earth and other planets

They are essential in the creation of earth's organisms

They helped create water on Earth

They helped heat the Earth

14.

1 point

How did Earth form its layers?

By orographic collisions

Due to the different densiteis of the magma

When rocks collided they became the inner most layers and the outer layers came later when more rocks collided.

The sun and moon pulled on other elements in the magma causing it to layer

15.

1 point

When Laurentia collided with other microcontinents what did it eventually become?

New Laurentia

North America

Rondinia

Teckla

16.

1 point

How long ago was it when earth first had land?

5 million years ago

10 million years ago

2.5 billion years ago

3 billion years ago