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If the null hypothesis states that there will be no difference in the average score of 9th graders and the average score of 12th graders on the ABC memory test, how should you state the nondirectional research hypothesis?
Hot Spots
Areas of the Earth's mantle that are anomalously hot compared to surrounding areas, causing volcanic activity on the surface.
Linear Island Chains
Linear arrangements of islands, often volcanic, aligned along a single submarine ridge due to tectonic activity.
Oceanic Plateaus
Large, flat, elevated areas of the seabed, formed by volcanic activity and often found in the deep ocean.
Mantle Plumes
Columns of hot, solid material that rise from deep within the Earth's mantle and can cause volcanic hotspots.
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