Chemistry, 02.06.2021 18:30, brandon2222269
Human activity causes changes to the groundwater and surface water in a watershed. Which change to groundwater or surface water is classified as a chemical change?
A. Concrete streets and parking lots cause more water to remain surface water instead of absorbing into the ground to become groundwater.
B. Hydroelectric dams built on rivers create lakes upstream of the dams and variable flow downstream.
C. Industrial waste that is dumped in a river causes acidic conditions that cause damage to fish digestive systems.
D. Rainwater collects in drainage ditches and flows to nearby lakes, increasing the water volume in lakes.
Answers: 1
Chemistry, 21.06.2019 17:50, josegalvan123jg69
Which statement is a reason to support population regulation? a) it is unethical for us to control birth control rates b) humans have the freedom to produce as many children as desired c) the gap between the rich and poor has been narrowing since 1960 d) billions more people on the earth will intensify many environmental and social problems
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Chemistry, 22.06.2019 12:30, hayleyconsole
Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.
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Chemistry, 23.06.2019 00:50, lakhanir2013
The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as
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Human activity causes changes to the groundwater and surface water in a watershed. Which change to g...
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