1. Which of the following is found between pores of rocks below Earth’s surface? ………. 

2. ……………..forms about 3% of water on Earth. 

3. ……………….are the largest in aquatic ecosystems. 

4. Micro-plastics may exist in …………..on the Earth. 

5. Poor quality of fresh water leads to the extinction of some species live in such as ………………….