Fill in the blanks with the words from the box. You may need to change the forms of some of words Yon may need to use one word more than once.
forces | water | objects | full | important | clothes | in | the | made | currents |
The world is (a) ----- uncountable natural and man (b), air and (d) of objects. Natural (c)are stones, trees, air and (d) ---- . Man-made objects are houses, cars. (e) ------ and chemicals. Natural (f) ------ are cyclones, earthquakes, volcanoes, storms and ocean (g) ------ Life exists (h) ------ different conditions. It is very (i) ----- to keep (j) ----- environment clean.