Gunpowder is a heterogenous mixture,
Reason : the composiotion of the mixture is not uniform throughout, the mixture can be separated by a suitable method , and finally , it composes of charcoal, sulfur and potassium nitrate which is not homogeneous mixture.
The first one is 2
The second is 1
The third is 6
And the fourth is 3
Answer:
A. the jar covers
Explanation:
An independent variable is what you, as the scientist, changes.
D.) the original components retain their individual properties