Matching Pairs NATURAL WORLD (AUDIO)Online version U2. Our beautiful planet. English - 5º PRIM. by Nazaret MR 1 It's the natural world (land, water, air, plants and animals). 2 It's smaller than a mountain. 3 It's bigger than a sea. 4 It's smaller than a river. 5 It's an area of ground. 6 It's the light and heat produced by burning. 7 It's smaller than a rock. 8 It's a large area of land with little water. 9 It's a large hole inside rock. 10 It's a small forest.