4. What are the potential sources of error that might cause disagreement between the activity series' prediction of reactions and your observations of reactions

1. Not to have enough salt water on the foil

2.not cleaning the foil well to remove interfering materials

they all get energy from eating other animals, dead animals to be more precise.

hienas tends to steal pray from other animals. crows and vultures tend to eat dead animals and leftovers.

hope it ,

bioteacher101