hydrosphere: all the waters on the earth's surface, such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.
Noun - . Lakes and rivers are important sources of freshwater in the earth's hydrosphere.
astronomy: the branch of science which deals with celestial objects, space, and the physical universe as a whole.
Noun - I've always had an interest in astronomy
rocks: a large mass of stone forming a cliff, promontory, or peak.
Noun - If they didn't own the ore mines, they'd be using rocks to fight.
paleontology: the branch of science concerned with fossil animals and plants.
Noun - If you are on the west coast, don't miss the Ruth Hall Museum of Paleontology.
meteorology: the branch of science concerned with the processes and phenomena of the atmosphere, especially as a means of forecasting the weather.
Noun - Meteorology is the science of the weather.
geology: the science that deals with the earth's physical structure and substance, its history, and the processes that act on it.
Noun - There are museums of mineralogy and geology, a lower school of mining, model room and scientific library.
Earth Sciences: the branch of science dealing with the physical constitution of the earth and its atmosphere.
Noun - He's already got a credit/three credits in earth science.
dinosaurs: a fossil reptile of the Mesozoic era, in many species reaching an enormous size.
Noun - We reconstructed what the dinosaur looked like from a few of its bones.
geography: the study of the physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these, including the distribution of populations and resources, land use, and industries.
Noun - The geography of Northern Italy is described in several popular guide books.
galaxies: a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
Noun - A major goal of modern astrophysics is to understand how galaxies formed.
biosphere: the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.
Noun - All of the ecosystems in the world make up the biosphere
oceanography: the branch of science that deals with the physical and biological properties and phenomena of the sea.
Noun - The group's work in polar oceanography continued at a modest level.
long periods: A long period is usually defined as one that lasts more than seven days.
Noun - This long period only gives women.
physical: relating to the body as opposed to the mind.
Adjective - He has an unusual physical appearance.
hydrology: the branch of science concerned with the properties of the earth's water, and especially its movement in relation to land.
Noun - Water tracing is a technique used to investigate underground hydrology, and can provide this crucial missing information.
atmosphere: the envelope of gases surrounding the earth or another planet.
Noun - The spacecraft disintegrated as it entered the Earth's atmosphere
climatology: the scientific study of climate.
Noun - He is using the same cyclone climatology as Helen but to develop a climatology of polar lows.
geosphere: includes the rocks and minerals on Earth
Noun - Appreciable amounts of nitrogen are present in the atmosphere, biosphere, hydrosphere, and geosphere.
planet: a celestial body moving in an elliptical orbit around a star.
Noun - What planet is he on? There are 8 planets in the solar system.
chemicals: a compound or substance that has been purified or prepared, especially artificially.
Noun - Officials claim the chemical poses no real threat.