what is protoerth?

Question 1

earth formed from

Answer 1

protoearth 4.6 billion years ago

Question 2

earth formed from what?

Answer 2

Dust and Gases left over from the formation of sun.

Question 3

solidification of layers within the earth

Answer 3

Crust, lithosphere 50 km, mantle(asthenosphere 700 km, core inner outer.

Question 4

Density of core

Answer 4

11.5 g/cm3

Question 5

density of crust

Answer 5

2.5 g/cm3 ea

Question 6

origin of the ocean

Answer 6

Cometary Impact: Water derived from icyImpact. Degassing: Water given off as steam fromDegassing: Water given off as steam

Question 7

ocean exist

Answer 7

4.0 billon years ago

Question 8

How Life Appears on Earth

Answer 8

Tide Pools Catalyzed byLightningTide,
Formed Around Submarine Hot Springs.
Brought in as Organic Compounds on Comets.

Question 9

3.8 billion years

Answer 9

Bacteria fossils found in rocks
 StromatolitesStromatolites - Algal blooms that- Algal blooms that
lived as colonies in mat or dome likelived as colonies in mat or dome like
structuresstructures
 Photosynthesis beginsPhotosynthesis begins
 Algae begin releasing free OxygenAlgae begin releasing free Oxygen
into the atmosphereinto the atmosphere
 COCO 22 + H+ H 22 OO →→ CC 66 HH 1212 OO 66 + O+ O 22

Question 10

2.2-2.0 billion years ago

Answer 10

Bacteria fossils found in rocks
 StromatolitesStromatolites - Algal blooms that- Algal blooms that
lived as colonies in mat or dome likelived as colonies in mat or dome like
structuresstructures
 Photosynthesis beginsPhotosynthesis begins
 Algae begin releasing free OxygenAlgae begin releasing free Oxygen
into the atmosphereinto the atmosphere
 COCO 22 + H+ H 22 OO →→ CC 66 HH 1212 OO 66 + O+ O 22

Question 11

who Developed idea of Continental Drift

Answer 11

Alfred Wegener

Question 12

Who Developed idea of Sea Floor Spreading

Answer 12

Harry Hess

Question 13

The crust or ‘lithosphere’ of the Earth is

Answer 13

made up of large rock slabs

Question 14

What Causes This plates move slowly over time are?

Answer 14

Convection currents in the Earth’s
interior
Movement of molten rock material from
deep within the earth toward the
Earth’s surface
Similar to boiling water on a stove

Question 15

The Earth’s surface can move in three ways:

Answer 15

1) Divergent Motion: When two tectonic plates
move apart from one another.2) Convergent Motion: When two tectonic plates
move toward one another.
3) Transform or ‘strike slip’ Motion: When two
tectonic plates slide past one another at an angle.

Question 16

he crust or ‘lithosphere’ of the Earth is
made up of large rock slabs or plates as
they are called.

Answer 16

tectonics plate

Question 17

what case the plate movement.

Answer 17

Convection currents in the Earth’s
interior
Movement of molten rock material from
deep within the earth toward the
Earth’s surface
Similar to boiling water on a stove