Matching Pairs At the Beach Vocabulary Online version 5th Grade - Unit 2 Week 1 by Miss Sonzogni 1 Driftwood 2 Sea Urchins 3 Tweezers 4 Concealed 5 Lamented 6 Sternly 7 Algae 8 Hammocks Small, round sea animals with spiny shells. A group of living things, mostly found in water, that can make their own food. Felt or showed grief Strictly; firmly Wood carried along by water, or washed ashore by the water. Small pinchers for picking up small objects. Hanging beds or couches made of canvas, cord, or other materials. Put out of sight; hidden.