Ocean Origin

Question 1

How long ago did the ‘big bang’ occur

Answer 1

13.7 billion years

Question 2

What are the most abundant elements in the universe

Answer 2

Hydrogen and helium

Question 3

How are heavier elements are produced

Answer 3

Nucleosynthesis

Question 4

How do stars create helium

Answer 4

burn hydrogen making lots of energy- 4 hydrogen atoms and 5 million degree temp= 1 helium

Question 5

What happens when all the hydrogen is gone

Answer 5

star collapses and will burn helium to form carbon and oxygen

Question 6

How are the heaviest elements formed

Answer 6

from stars collapsing several times and supernovas

Question 7

When was our solar system formed

Answer 7

4.6 billion years ago

Question 8

Name some elements that remained when Earth formed

Answer 8

Oxygen (bonded to metals)
silicon
iron
aluminum
calcium
magnesium
sodium
potassium

Question 9

How were the oceans formed

Answer 9

• volatile gases were trapped in Earth
• these were released in early history
• HCl made up sea salt
• volcanoes release additional volatiles

Question 10

How old are the oceans

Answer 10

4 billions years

Question 11

How did ocean become salty

Answer 11

volatile chemicals released by volcanoes

chemicals leached from rocks and crust

Question 12

How has composition of sea changed

Answer 12

it hasn’t for about 1 billion years

Question 13

how has change in composition been attributed by living things

Answer 13

oxygen from cyanobacteria and plans

carbon from respiration and it accumulates in ocean sediment