Devise and write a step by step plan of the method used to separate a mixture of sand, dead matches, small pebble and steel paper clips.​

Sorry i dont understand the question can you rephase it?

Answer charle's law

Answercanyon;

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.