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