More cards in this set

Card 6

Front

Bits of rock and sand in waves grind down cliff surfaces like sandpaper.

Back

Preview of the front of card 6

Card 7

Front

Waves smash rocks and pebbles on the shore into each other, and they break and become smoother.

Back

Preview of the front of card 7

Card 8

Front

Acids contained in sea water will dissolve some types of rock such as chalk or limestone.

Back

Preview of the front of card 8