There are mountains, ridges, valleys, and plains on the ocean floor.
a) false
b) true
true
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To determine if the statement is true or false, we need to understand the characteristics of the ocean floor. There are geological features present on the ocean floor such as mountains, ridges, valleys, and plains.
Mountains: Underwater mountains, known as seamounts, can be found on the ocean floor. These mountains can rise above the surrounding seafloor and can be tall and steep.
Ridges: Mid-ocean ridges are long underwater mountain chains found in the middle of the oceans. They are formed due to the divergence of tectonic plates.
Valleys: Submarine valleys, also known as trenches, are deep, elongated depressions on the ocean floor. They can be hundreds or even thousands of kilometers long and are usually formed as a result of tectonic activity.
Plains: Abyssal plains are vast, flat areas found on the ocean floor. They are generally at a depth of several thousand meters and are smoother compared to other features.
Taking these facts into account, we can conclude that the statement "There are mountains, ridges, valleys, and plains on the ocean floor" is true.