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