1 - The youngest rocks on the ocean floor are located: a) Near continents. c) At

Question

1 - The youngest rocks on the ocean floor are located: a) Near continents. c) At oceanic ridges. b) Far from mid-ocean ridges. d) Near the poles.

2- Which boundaries are examples of divergent plate boundaries? The boundaries between the: a) Nazca and South American plates d) Indian-Australian plate and Antarctica plate b) Pacific plate and Eurasian plate e) African Plate and South American Plate c) North American and Eurasian plate f) Nazca plate and Pacific plate

3 - The oceanic ridge system is present in the: a) Pacific and Atlantic Oceans but not the Indian Ocean b) Indian and Pacific oceans, but not Atlantic Ocean c) Pacific, Atlantic, and Indian oceans

4. The presence of __________and ___________are characteristic of divergent plate boundaries (choose two): a) An oceanic ridge c) Hot spots b) Shallow earthquakes d) Island arcs.

Explanation / Answer

1. c) at Oceanic ridges.

The youngest rocks on the ocean floor are found near underwater mountain chains called also known as mid-ocean ridges. These ridges are formed as continental plates move apart andmantle material moves in to fill the space.

2. b) pacific plate and Eurasian plate

Effects that are found at a divergent boundary between oceanic plates include: a submarine mountain range such as the Mid-Atlantic Ridge; volcanic activity in the form of fissure eruptions; shallow earthquake activity; creation of new seafloor and a widening ocean basin.

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