Answer:
identify the variables
Explanation:
control:type of lemon used
dependent:whether apple slice turns brown at pH>2
independent:pH value
What is the question here? There’s multiple answers
Answer:
Tropical plant fossils were found in Arctic areas.
Similar rock types are found across continents.
Explanation:
I found several researches on the similarities among the continents. Sorry I dont know the 3rd one
This process is called diffusion
hope that helps