Question

1. a steep drop - off from the continental shelf that plunges to depths of... type: multiple choice

• a) continental slope
• b) trench
• c) rift valley
• d) continental shelf

1. a steep - sided valley at the center of a mid - ocean ridge — type: multiple choice

• a) rift valley
• b) trench
• c) abyssal plain
• d) continental rise

1. a flat area of the ocean floor, covered with sand, mud, and plant and animal remains — type: multiple choice

• a) abyssal plain
• b) seamount
• c) mid - ocean ridge
• d) continental shelf

1. a mountain that breaks through the surface of the water — type: multiple choice

• a) volcanic island
• b) guyot
• c) trench
• d) continental rise

1. submerged area that rims the land, beginning at the shoreline and gently sloping underwater to an average depth of about 430 feet — type: multiple choice

• a) continental shelf
• b) continental slope
• c) abyssal plain
• d) mid - ocean ridge

1. a chain of mountains that runs through the three major oceans (most stand about 5,000 feet above the seafloor) — type: multiple choice

• a) mid - ocean ridge
• b) seamounts

Explanation:

Question 2 (assuming the first visible MC is Q2)

The question describes a steep drop - off from the continental shelf. The continental slope is the steeply inclined part of the continental margin between the continental shelf and the continental rise. A trench is a long, narrow depression in the ocean floor, a rift valley is related to mid - ocean ridges or continental rifting, and the continental shelf is the shallow, submerged part near the land. So the correct answer is the one that matches the description of the steep drop - off from the continental shelf.

A steep - sided valley at the center of a mid - ocean ridge is a rift valley. Trenches are deep depressions, abyssal plains are flat ocean floor areas, and continental rise is part of the continental margin. So we identify the option that is a steep - sided valley at mid - ocean ridges.

A flat area of the ocean floor covered with sand, mud, and organic remains is an abyssal plain. Seamounts are underwater mountains, mid - ocean ridges are mountain chains in the ocean, and continental shelf is the shallow part near land. So we choose the option that fits the description of a flat ocean floor area with these deposits.

Answer:

A) Continental slope

Question 3