ES 8.5 Early Earth

Single Cell organisms were found in 3,5 billion year old rock. These creatures were protected by the ozone layer and were shielded from the rays of the sun.

• Precambrian Era

• The continents

• Geologic Time Scale

• Early Organisms

A ball of dust, gas, and ice that orbits the sun

• The moon

• Meteor

• The continents

• Comet

A record of geologic events and the evolution of life forms as shown in the fossil record. The scale was made by studying rock layers and index fossils world wide.

• The moon formation

• early organisms

• geologic time scale

• earth's first atmosphere

The Earth's surface was hot causing all liquids to evaporate into the primitive atmosphere. Later when the surface of the Earth cooled, the water vapor condensed and came down in the form of rain which eventually filled the oceans.

• Precambrian era

• the oceans

• the continents

• early organisms

Earth's first and longest era that began 4.6 billion years ago that includes creation of the Sun, Earth, the atmosphere, oceans and life

• Precambrian Era

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

was created as volcanoes, comets, and meteors added water vapor, carbon dioxide, nitrogen, and methane but almost no oxygen . → Second Atmosphere

• True

• False

The sun releases strong bursts of particles called solar wind. Earths gravity couldn't hold on to the light atmosphere made up of hydrogen and Helium and it blew away.→ Geologic Time Scale

• True

• False

Earth's rocks cooled from lava into rock and the rocks formed the continents which moved, broke apart, and crashed together. → Precambrian Era

• True

• False

It began as a ball of dust and ice in space. Then it grew larger and its gravity increased pulling more dust and ice towards it. Collisions causing energy made the Earth hot and caused it to melt. Dense material sank while less dense stayed on top. This created Earth's Iron core and outer layers. → Second Atmosphere

• True

• False

a large object hit earth during its early history and blasted part of the mantle into space where it collected into the moon → The Moon formation

• True

• False