Yes it is , <span>A hypothesis is a reasonable guess based on what you know or observe.</span>
<span>The level of carbon dioxide in the atmosphere is maintained by several processes, including photosynthesis, respiration and combustion. Green plants remove carbondioxide from the atmosphere by photosynthesis. Living organisms - including allplants and animals - release energy from their food using respiration.</span>
<span>A spider is small enough that its weight can be supported by surface tension, the relatively weak forces that hold water molecules together. </span>Water molecules "bond"<span> to other water molecules around them in all directions, so they tend to stick more strongly to their neighbors, forming a film-like layer across the surface</span>
Differences in air pressure at Earth's surface are caused by unequal heating of Earth. Warm air masses are less dense and have lower air pressure than cold air masses.
