Answer:
8 cm and 9 cm
Explanation:
To estimate the sides of triangle we must understand that any side of a triangle is greater than the differences between any two sides and also less than the sum of the two sides.
In this problem;
One of the sides is 13cm;
According to our theorem, this sides is less than the sum of the other two sides and greater than difference between the two sides.
8 cm and 9 cm is the correct choice;
if the other two sides are 8cm and 9cm;
9cm - 8cm = 1cm
9cm + 8cm = 17cm
13cm is in between them.
The order is incandescent Earth, an increase of gravity, denser elements sinking, volcanic eruptions, rain falls, ocean formation, photosynthesis and ozone layer.
<h3>How did Earth form?</h3>
The Earth planet was formed first by the condensation of heat-warmed elements that constituted the primitive Earth.
This primitive Earth was progressively cooling and huge massive volcanic eruptions ceased along geological time.
Subsequently, different forms of photosynthetic life emerged on the Earth first in the marine (aquatic) ecosystems.
Learn more about Earth's formation here:
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It is the study of how governments use their natural resources
Answer:
Because of the natural resources, good geographical position and good trade links with surrounding areas.
Explanation:
Egyptian civilization that flourished from the 3rd Millennium BC was one of the most developed civilizations of the Ancient times. Good geographical position and ties with Europe and Asia across Sinai Peninsula and Mediterranean Sea allowed them to develop trade links. Culture, art, natural resources were the reasons why anyone would be keen to conquer Egypt.
Answer:
Continental crust
The continental crust is the layer of granitic, sedimentary and metamorphic rocks which form the continents and the areas of shallow seabed close to their shores, known as continental shelves.
It is less dense than the material of the Earth's mantle and thus "floats" on top of it.
Continental crust is also less dense than oceanic crust, though it is considerably thicker; mostly 35 to 40 km versus the average oceanic thickness of around 7-10 km.
About 40% of the Earth's surface is now underlain by continental crust.
