Front

Map shows earthquake & volcano locations. They usually occur...

Back

at the edge of tectonic plates 在構造板塊的邊緣

Front

NOT evidence for Pangea:

Back

the density of continental crust is the same everywhere 各地地殼的密度是相同的

Front

Seafloor spreading occurs as a result of...

Back

divergent plate boundaries

Front

Relationship between age and distance from mid-ocean ridge:

Back

as distance increases, age increases

Front

Stripes on the Mid-Ocean ridge show magnetic polarity. The pattern is...

Back

symmetrical on both sides

Front

Stripes on the Mid-Ocean ridge indicate magnetic polarity. Current polarity is...

Back

normal because North points North 正常，因为北指向北

Front

A convection cell is when warm substance rises and cool substance sinks.

Back

warm substance rises, cool substance sinks.

Front

Convection is represented by circular arrows. In which Earth layer is convection found?

Back

asthenosphere (part of the mantle)

Front

NOT a geologic feature from convergent boundaries?

Back

rift valley 裂谷

Front

Seismic wave that travels fastest and arrives first during an earthquake.

Back

P wave