Answer:
Parallax would be most effective in measuring distances to stars which are close to the Earth.
Explanation:
In the experiment,
- The parallax shift would decrease as the pencil would move further away from the scientist's eye, so option 1 would be invalid.
- the size of the pencil remains constant, so option 2 would be invalid.
- the parallax shift can be observed when the pencil has objects in the background to provide relation, that is to say, the shift of the pencil when seen relative to background objects; therefore, if we assume that the pencil is a star nearby to the Earth, and the background objects are stars that are further away, then the shift of, and thus, distance to the nearby star can be easily observed.
Answer:
In geology, the rivers' main role is erosion and deposition, while for humanity, they have been crucial for the survival and development.
Explanation:
The rivers are water bodies (almost always of freshwater) and they have an influence on many things, be it of living or non-living nature. Physically, the big influence of the rivers can be seen in geology. The socio-economic and existential influence can easily be seen with humans.
In geology, the rivers have a big influence because of their big erosive power and their carrying capacity. Basically, the rivers destroy the rock strata, but also carry the material and pile it up at another place. At humanity, the rivers have been crucial for the survival of the species, but they have also enabled humans to produce their own food, develop civilization, and prosper.
The mountains have emerged where the tectonic plates meet. The collision of the tectonic plates can disrupt the earth causing earthquakes as well as the growth of a mountain. These mountains take awhile to become the giants they are.
Answer:
It changes the angle.
Explanation:
Seasonality affects the angle of the sun above the horizon by making it higher in the summer and lower in the winter.
The tilt of the Earth is responsible for the seasons and for the angle at which the solar rays make contact with any given point on the globe during a certain season.
In summer, the Sun is closer to the overhead position, while in winter the Sun is lower on the horizon.
