An error is that the scientist did not control their variables. They had one group of people playing the game at 6, and another group playing at 12. This means that other things might have affected the scores other than what was being tested, which was caffeine.
All the blood types are A+, A-, B+, B-, O+, O-, AB+, and AB-.
The mixture would be :
1. Homogeneous; dissolving followed by filtration and distillation
salt dissolve in water and will be the filtrate and chalk will be the residue in the filter paper
hope this helps
Answer:
The control variable is the soldier.
Explanation:
The same soldier is used throughout the test
Answer:
Muscle contraction thus results from an interaction between the actin and myosin filaments that generates their movement relative to one another.
