5.) How is scientific hypothesis different from a scientific theory? 6.) Briefly
ID: 157585 • Letter: 5
Question
5.) How is scientific hypothesis different from a scientific theory?
6.) Briefly describe the events that led to the formation of the solar system..
7.) List and briefly define the four “spheres” that constitute our environment.
8.) The oceans cover nearly ___ percent of the earth’s surface and contain about ____ percent of the planets total water supply
9.) List and briefly describe the compositional divisions of the earth.
10.) Contrast the asthenosphere and the lithosphere.
11.) Describe the general distribution of earth’s youngest mountains (Less than 100 million years old.
12.) Distinguish between shields and stable platforms.
13.) List the three major regions of the ocean floor.
14.) How is an open system different from a closed system?
15.) Contrast positive feedback mechanisms and negative feedback mechanisms.
16.) What are the two sources of energy for the earth system
Explanation / Answer
5. hypothesis is alsways considered as an educated guess which may change with testing scores or results but a theory is a proven statement which is universally accepted. A theory is the result of testing a hypothesis and developing an explanation that is assumed to be true about something.
6. it all began almost 4.6 billion years agao with a gravitational collase of a giant mlecular cloud Most of the collapsing mass collected in the centre, forming the Sun, while the rest flattened into a protoplanetary disc out of which the planets, moons, asteroids, and other small Solar System bodies formed.
7. atmosphere, lithosphere,biosphere,hydrosphere
atmosphere is the envelope in which we live , it is made of abiotic components
lithosphere is the earth crust on which we live including mantle and core
biosphere is the biotic environment aournd us i.e made up of living thins including plants
hydrasphere is the water aorund us in all three forms solid , liquid and gas
8. 71 and 97 % is the answer
9. these are crust, mantle , outer core and inner core
crust is the layer over which we live,mantle is the layer under the crust which is in the liquid phase and have conventional current. The outer core is liquid. Consideration of its density and electrical properties suggest the liquid is dominantly iron with smaller quantities of nickel, sulfur, and other elements. The inner core is a crystalline solid; it is thought to be mainly iron alloyed with nickel and a small percentage of other elements.
10. The lithosphere is cooler and more rigid it is consists of heavier oceanic basalt and lighter continental rock
the asthenosphere is deeper and hotter. The rocks, despite the heat, are under high pressure and are solid, but can slowly flow plastically,
11 this all has taken place at the mid oceaninc ridge where the mountains started to form adn move away because of divergence of the plates
12 the shield is a place where rocks are so thick that any shear or strain are easily absorbed A stable platform is a covering of sedimentary rock on top of the craton. The rocks of the craton are not as thick as those in the shield, but the differences in composition mean that both behave differently
13. continental shelf, continental rise and continental slope
14. in closed system is not open to the environment it means it cannot exchange heat and a=energy with the atmosphere
15. when susbstance increase the input to increase output it is positive and when susbtance increases input to decrease output it is negative feedback
16. sun as an external energy source and internally it is gravitational pulland isotopes moreover we also have geothermal energy
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