The sudden disappearance of the dinosaurs has baffled _______ for many years.
analysts
opponents
scientists
clinicians
All of the ecosystems in the world make up the ________.
method
biosphere
desalination
seawater
One example of scientific _______ is the fact that the earth rotates on its axis as it revolves around the sun.
knowledge
equipment
supply
method
The modern scientific ______ is usually attributed to Galileo.
knowledge
method
surface
supply
The _______ once covering 26,000 square miles vanishes into desert.
soil
biospheres
seawater
desalination
The ____ is very fertile, and many of the inhabitants have acquired much wealth from the cultivation of rice.
flooded
surface
seawater
soil
We have a plentiful _____ of water.
desalination
equipment
supply
advantages
The ________ plant was to be funded by raising water rates to achieve full cost recovery.
seawater
desalination
extreme
large-scale
An _____ is a small animal that has six legs. Most insects have wings.
arthropod
fly
insect
bug
The amount of ______ is dependent on the extent of the daytime cloud cover.
sunlight
surface
seawater
interest
97% of all the water on the Earth's ______ is salt.
equipment
soil
flooded
surface
A _______ study of the benefits of dark chocolate would require many people and lots of time.
discovered
constant
effectively
large-scale
The school needs new laboratory ________.
surface
knowledge
equipment
supply
Science has _________ that there are five types of human beings.
observed
flooded
discovered
generated
Two species of blind fish, of ______ scientific interest, are found in the caves of the island.
extreme
effectively
constant
optimistic
In the rainy season this valley becomes a sea, ______ by the discharge of the Khanega.
supplied
discovered
surfaced
flooded
