unit 1 Flashcards
All living systems in the _____________ depend on earth’s other systems to survive.
biosphere
In which step of the water cycle is the water is turned into water vapor?
evaporation
The four types of liquid water from least salty to most salty are _____.
freshwater, brackish water, saltwater, brine
the study of water as it moves through the water cycles
the study of oceans, which includes navigation of the oceans
_______________ forms when ice crystals melt on their fall to earth’s surface and then refreezes as it encounters a layer of air below freezing before hitting the earth.
Sleet
The ____________ is the system that contains all the air surrounding the earth.
atmosphere
What is the scientific method?
a series of steps that scientists use to find out more about the world in which we live
How did Ptolemy contribute to oceanography?
drew a world map that was used by mankind for over 1,200 years
Define aquatic biology.
the study of life in water
An example of a closed system can be _____.
water cycle
What is an independent variable?
a variable that is purposefully changed in an experiment
What is hydrosphere?
the system that contains all the earth’s water and the water cycle
What is referred to as a controlled variable?
a variable that does not change during an experiment
What is percolation?
when water falls on soil, rocks, or sand the water slowly moves downward due to gravity through the pores of these materials
Indus River
Early civilization in present-day Pakistan developed near the _____.
What is a theory?
is accepted as true by most scientists but they can change
an explanation of a natural or physical phenomenon based on a hypothesis that has been found to be true and has been verified many times by different groups of scientists