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eduard
3 years ago
8

What is the earilest skill people developed?​

Geography
2 answers:
RideAnS [48]3 years ago
3 0

Answer:

breathing

Explanation:

dlinn [17]3 years ago
3 0

Answer:

They learned how to hunt and make fires

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1. Measuring on an orthophoto, you find that the width of a five-lane freeway is 0.2 inches. Assuming that each lane in the free
Orlov [11]

Answer:

The representative fraction of photo will be 1:3600

Explanation:

Orthophoto is constructed geometrically where there is no distortion unlike maps.

The width of a five lane freeway is 0.2 inches.

Assuming the width of each lane to be 12 feet, then the total width of all the five lanes is 12×5=60 feet

We know that 1 feet = 12 inches

So, 60 feet = 60×12= 720 inches

So , we get that 0.2 inches on the orthophoto is 720 inches on the ground.

So, 1 inch on the orthophoto = \frac{720}{0.2}=3600 inches on the ground = 3600 inches.

Thus the scale is 1:3600

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3 years ago
How does oxygen move around Earth’s spheres?
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Answer:

Breathing – It is the physical process, through which all living organisms, including plants, animals and humans inhale oxygen from the outside environment into the cells of an organism and exhale carbon dioxide back into the atmosphere.

Decomposition: It is one of the natural and most important processes in the oxygen cycle and occurs when an organism dies. The dead animal or plants decay into the ground, and the organic matter along with the carbon, oxygen, water and other components are returned into the soil and air. This process is carried out by the invertebrates, including fungi, bacteria and some insects which are collectively called as the decomposers. The entire process requires oxygen and releases carbon dioxide.

Combustion: It is also one of the most important processes which occur when any of the organic materials, including fossil fuels, plastics and wood, are burned in the presence of oxygen and releases carbon dioxide into the atmosphere.

Rusting: This process also requires oxygen. It is the formation of oxides which is also called oxidation. In this process, metals like iron or alloy rust when they are exposed to moisture and oxygen for an extended period of time and new compounds of oxides are formed by the combination of oxygen with the metal.

Explanation: The Stages

Stage-1: All green plants during the process of photosynthesis, release oxygen back into the atmosphere as a by-product.

Stage-2: All aerobic organisms use free oxygen for respiration.

Stage-3: Animals exhale Carbon dioxide back into the atmosphere which is again used by the plants during photosynthesis. Now oxygen is balanced within the atmosphere.

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