Why Do We Yawn?
Vocabulary
yawn
quickly
contagious
bored
might
however
excited
race
deeply
stretch
muscles
Why do we laugh?
Vocabulary
yawn
quickly
contagious
bored
might
however
excited
race
deeply
stretch
muscles
Why do we laugh?
People laugh about 17 times a day.
There are laughter clubs in India.
People say they feel good after laughing together.
Scientist think laughter is good for you.
100 laughes = ten minutes of running
When you laugh, you also breath deeply.
Scientists believe laughter connects us with people.
"Laughter is the best medicine"
Why is the Sea Salty?
Vocabulary
mix
run
go
move
carry
evaporate
stay
famous
salty
saltier
sea
ocean
How Can a Plant Kill?
kill
move
run away
eat
get sick
die
learn
stay
make
grow
use
come
collect
study
enemies
poison
poisonous
expensive
many kinds
petroleum
cheap
instead of