science wrong study

What did the iron core create?

• Earth's magnetic field
• The moon's orbit
• The sun's heat
• Earth's atmosphere

what does density form?

• the earth

• subduction zone

• layers

• hot spots

how do we know how long the earth cooled?

• the oldest rocks on earth

• solidification of magma

• iridium

• the earth cooled when the oceans formed

what caused Earth's greatest mass extinctions

• meteor/asteroid impacts

• volcanoes in Africa 120 million years ago

• the death if animals

• volcanoes in Siberia 250 million years ago

iridium large was...

• 45 million year old rocks

• 65 million year old rocks

• 68 million year old rocks

• 56 million year old rocks

why did scientists abandon there hypnotists?

• lack of plutonium

• lack of sulfur oxide

• lack of oxygen

• lack of iriduim

As half life decays it...

• it goes away

• remains constant

• decreases

• increases

what do earthquake waves tell us?

• where the subduction zones are located.

• where the convection currents are located.

• where the fossils are located.

• where the layers are located.

what kind of boundary are subduction zones?

• convergent

• transform

• divergent

where does new crust form?

• earths core

• land

• oceans

• mouuntains