less than pH 5.6
1/6.
3. Which planet has the highest gravity ?
Jupiter.
4. Does air flow from high pressure area to low pressure area or from low pressure area to high pressure area?
from high pressure area to low pressure area
Increase.
299,792.458 km/s (or roughly 300,000km/s)
Receive light stimulus.
One: copper.
A reaction that gives out heat.
The roar of a jet engine is the loudest sound we normally hear. It is a thousand times louder than someone shouting. Sounds this loud can damage our ears if we are too close to them. The quietest sounds we can hear are things like rustling leaves.
When all the water is gone, you will see huge mountains, deep valleys and flat plains, just like on a dry land.
Every person in America and also its neighboring countries will get skin cancer.
The molecular structure of DNA (double helix) was first determined by Watson and Crick in 1953.
Female black widow spiders eat their males after mating.
There are 60,000 miles of blood vessels in the human body.
There are 208 bones in an adult.
Femur is the longest.
Ear bones (malleus, the stapes and the incus) are the shortest.
Human tapeworms can grow up to 22.9m.
An electric eel can produce a shock of up to 650 volts.
The deepest part of any ocean in the world is the Mariana Trench(馬里亞納海溝) in the Pacific with a depth of 35,797 feet.