full transcript
From the Ted Talk by Angela Koine Flynn: The science of skin color
Unscramble the Blue Letters
But soon, some of our Sun-adapted ancestors migrated northward out of the tropical zone, spreading far and wide across the Earth. The further north they traveled, the less direct sunshine they saw. This was a problem because although UV lhgit can damage skin, it also has an important parallel bineeft. UV helps our bedois produce vtaimin D, an ingredient that strengthens bnoes and lets us absorb vital minerals, like calcium, iron, magnesium, phosphate, and zinc. Without it, humans experience serious fatigue and weakened bones that can cause a ciotiodnn known as rektics.
Open Cloze
But soon, some of our Sun-adapted ancestors migrated northward out of the tropical zone, spreading far and wide across the Earth. The further north they traveled, the less direct sunshine they saw. This was a problem because although UV _____ can damage skin, it also has an important parallel _______. UV helps our ______ produce _______ D, an ingredient that strengthens _____ and lets us absorb vital minerals, like calcium, iron, magnesium, phosphate, and zinc. Without it, humans experience serious fatigue and weakened bones that can cause a _________ known as _______.
Solution
- vitamin
- bodies
- benefit
- light
- bones
- condition
- rickets
Original Text
But soon, some of our Sun-adapted ancestors migrated northward out of the tropical zone, spreading far and wide across the Earth. The further north they traveled, the less direct sunshine they saw. This was a problem because although UV light can damage skin, it also has an important parallel benefit. UV helps our bodies produce vitamin D, an ingredient that strengthens bones and lets us absorb vital minerals, like calcium, iron, magnesium, phosphate, and zinc. Without it, humans experience serious fatigue and weakened bones that can cause a condition known as rickets.
Frequently Occurring Word Combinations
ngrams of length 2
collocation |
frequency |
uv light |
3 |
ancestors migrated |
2 |
skin color |
2 |
Important Words
- absorb
- ancestors
- benefit
- bodies
- bones
- calcium
- condition
- damage
- direct
- earth
- experience
- fatigue
- helps
- humans
- important
- ingredient
- iron
- lets
- light
- magnesium
- migrated
- minerals
- north
- northward
- parallel
- phosphate
- problem
- produce
- rickets
- skin
- spreading
- strengthens
- sunshine
- traveled
- tropical
- uv
- vital
- vitamin
- weakened
- wide
- zinc
- zone