sea turtles

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listen AND fill in the blanks TO IMPROVE YOUR LISTENinG SKILLS.

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Moises Ramirez Flores

México

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Completar Frases sea turtlesVersión en línea listen AND fill in the blanks TO IMPROVE YOUR LISTENinG SKILLS. por Moises Ramirez Flores 1 00 : 00 : 00 ( mellow music ) - [ Narrator ] Sea turtles are ancient mariners . Present in all but Earth's coldest , these marine reptiles are well - adapted to a life on the move . ( dramatic music ) Sea turtles have existed since the time of the dinosaurs . The earliest known marine turtle lived about million years ago . Named Desmatochelys padillai , it was six feet long and had the characteristic features of modern sea turtles including a carapace , or a top shell , and paddle - like limbs . Today , there are seven of sea turtles 00 : 00 : 41 with the largest being the leatherback . Growing as long as eight feet and weighing up to 2 , 000 pounds , it is larger than known fossils of its prehistoric , the padillai . Sea turtles can lay more than 150 eggs at a time . Called the clutch , these large egg deposits help ensure the survival of sea turtle hatchlings . Once a female her eggs , she returns to the sea , leaving her hatchlings to fend for themselves . Fewer than . 1% of hatchlings to adulthood in part due to numerous predators on the beach . 00 : 01 : 21 Emerging in large numbers increases the chance that some will survive . ( waves crashing ) A sea turtle's sex is determined by temperature . Unlike most vertebrates , a turtle's sex is not determined by sex chromosomes . Instead , the temperature of the nest determines the sex of the hatchlings . When are warm , at about 88 degrees Fahrenheit , most of the hatchlings will be female , but when temperatures are cooler , less than around 82 degrees Fahrenheit , most of the hatchlings will be male . 00 : 01 : 57 ( mellow music ) Sea turtles use Earth's magnetic fields to navigate . Sea turtles have geomagnetic abilities which serve as an internal GPS . The have particles of magnetite , a magnetic mineral , in their brains . The magnetite likely plays a role in orienting sea turtles to Earth's magnetic poles , similar to a compass . Baby sea turtles imprint on the unique magnetic signature of the beaches where they hatch . This magnetic map can them back to the same beaches several years later 00 : 02 : 31 to lay their own eggs . ( mellow music ) All seven sea turtle species are with extinction . Once abundant , sea turtle populations have dramatically declined in the past two centuries . Fishing is a major threat to sea turtles as they caught in fishing nets as bycatch , or accidental catch . Illegal harvesting of turtle eggs , trafficking in turtle products , and ocean pollution are also concerns . , policies have been enacted to reduce bycatch , protect turtle habitats , and prohibit the killing of sea turtles and their eggs . 00 : 03 : 12 By continuing this kind of intervention , humans can help stop the decline of sea turtles , helping keep these ancient mariners in the world's oceans . ( crashing )

Completar Frases

sea turtlesVersión en línea

listen AND fill in the blanks TO IMPROVE YOUR LISTENinG SKILLS.

00 : 00 : 00
( mellow music ) - [ Narrator ] Sea turtles are ancient mariners . Present in all but Earth's coldest , these marine reptiles are well - adapted to a life on the move . ( dramatic music ) Sea turtles have existed since the time of the dinosaurs . The earliest known marine turtle lived about million years ago . Named Desmatochelys padillai , it was six feet long and had the characteristic features of modern sea turtles including a carapace , or a top shell , and paddle - like limbs . Today , there are seven of sea turtles

00 : 00 : 41
with the largest being the leatherback . Growing as long as eight feet and weighing up to 2 , 000 pounds , it is larger than known fossils of its prehistoric , the padillai . Sea turtles can lay more than 150 eggs at a time . Called the clutch , these large egg deposits help ensure the survival of sea turtle hatchlings . Once a female her eggs , she returns to the sea , leaving her hatchlings to fend for themselves . Fewer than . 1% of hatchlings to adulthood in part due to numerous predators on the beach .

00 : 01 : 21
Emerging in large numbers increases the chance that some will survive . ( waves crashing ) A sea turtle's sex is determined by temperature . Unlike most vertebrates , a turtle's sex is not determined by sex chromosomes . Instead , the temperature of the nest determines the sex of the hatchlings . When are warm , at about 88 degrees Fahrenheit , most of the hatchlings will be female , but when temperatures are cooler , less than around 82 degrees Fahrenheit , most of the hatchlings will be male .

00 : 01 : 57
( mellow music ) Sea turtles use Earth's magnetic fields to navigate . Sea turtles have geomagnetic abilities which serve as an internal GPS . The have particles of magnetite , a magnetic mineral , in their brains . The magnetite likely plays a role in orienting sea turtles to Earth's magnetic poles , similar to a compass . Baby sea turtles imprint on the unique magnetic signature of the beaches where they hatch . This magnetic map can them back to the same beaches several years later

00 : 02 : 31
to lay their own eggs . ( mellow music ) All seven sea turtle species are with extinction . Once abundant , sea turtle populations have dramatically declined in the past two centuries . Fishing is a major threat to sea turtles as they caught in fishing nets as bycatch , or accidental catch . Illegal harvesting of turtle eggs , trafficking in turtle products , and ocean pollution are also concerns . , policies have been enacted to reduce bycatch , protect turtle habitats , and prohibit the killing of sea turtles and their eggs .

00 : 03 : 12
By continuing this kind of intervention , humans can help stop the decline of sea turtles , helping keep these ancient mariners in the world's oceans . ( crashing )

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sea turtlesVersión en línea

por Moises Ramirez Flores

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