Dark Matter only: detected through its gravitational attraction, has mass, most common form of mass in the halo of the Milky Way Galaxy, likely to consist of subatomic particles
Dark Energy only: inferred to exist from the measured acceleration of the universe's expansion, the proposed source of a universal repulsive force
BOTH: the universe contains more of this than it contains matter made from atoms, we do not know what it is made of
NEITHER: blocks light from stars behind it, "dark" because it emits only infrared light
Earth’s tilt causes each hemisphere to receive different amounts of __________.
Answer: life from the biosphere
The reason why the Greenhouse effect and the ozone layer are considered as related environmental issues is that they both are affected by the human activity, and they both cause rise of the global temperatures.
Explanation:
The greenhouse effect represents an atmospheric effect on the planet that results in global rise of the temperature. The cause of this effect is the accumulation of greenhouse gasses in the atmosphere, which have the property to trap big portion of the heat.
The ozone layer depletion is a process through which the ozone layer is destroyed. With the destruction of the ozone layer, ozone holes occur, which in turn results in higher UV radiation. The stronger the UV radiation, the more damage is cause on the living organisms.
Common things of both these processes are:
- the human activity has big influence on them
- the global temperature rises
- they cause drastic environmental changes and damage
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