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