Light and the time it takes to traverse between particular points in the universe is used to calculate the age of distant stars and galaxies. Because of the vast nature of the universe, light takes earth years for it to travel from one galaxy to another. By knowing the speed of light and the amount of time taken for the light to travel from a distant celestial body, and use of geometric calculations, and brightness measurements we can tell in approximation the age of the celestial body. The age can also star can also be determined by their composition. Youg stars are mainly found have lighter elements such as helium. As they age, they have more composition of heavier elements such as iron. This is due to the fusion at the core of the sun that fuses lighter elements to heavier elements.

The answers that apply are;

radiometric dating of rocks
fossil evidence
gradual processes of rock

Radiometric dating means the use of half-life of naturally decaying elements such as carbon-14 to tell the age of a fossil or rock. The gradual formation of rocks such as lithification of sedimentary rock or metamorphosis of rock is also used to calculate the age of the earth by studying the stage in the process in which the rocks are in and extrapolating the age using calculations.

4 0

2 years ago

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What’s the difference in the range of temperatures recorded last year and the range of temperatures recorded two years ago

aksik [14]

Answer:

To find:

1. Range of temperature between two years

2. Modal temperature last year

3. Median temperature 2 years ago.

Solution:

1. Range is difference between the highest and lowest value.

Range of last year = highest value-lowest value

= 27-6 = 23

Range 2 years ago = highest value - lowest value

= 25-17 = 18

So, difference in range of temperature between two years = 23-18 = 5

2. Modal temperature last year = 11Â°C

(number that appears most frequently in the series arranged in numerical

order from smallest to largest)

3. Median temperature 2 years ago,

Median = middle number of the series.

Arrange numbers from lowest to highest. As this series contains even

numbers of entries, so median is average of middle numbers. So, (13+17)/2 = 15

3 0

2 years ago

Why do you think Naples is so densely populated, despite the obvious threat from the volcano Vesuvius?

Helga [31]

<h2>There are several reasons why Naples is so densely populated, despite the obvious threat from the volcano Vesuvius.</h2>

Explanation:

Volcano acts as a main source of Naples. Pompeii, a big honeypot site attracts numerous tourists that requires hotels and restaurants which results in huge income from tourists.

The houses closer to the crater provides better sight across the entire Bay being the most probably danger area.

The land here is fertile and is best for greenhouses and farms. Local tomatoes, citrus fruit, grapes are produced in this region. The locals don't worry about the danger of the deep red area.

The important of volcano is the area’s topography, economy and is instrumental to its culture.

7 0

2 years ago

When a mineral breaks along a weakly-bonded plane, it is called?

kodGreya [7K]

Cleavage is the answer

7 0

2 years ago