Types of water to dissolve an effervescent tablet: Tap water
Warm water
Cold water
Salt water
Acidic water (using vinegar)
A control group in an experiment is the group that is not receiving a new or manipulated variable. The control group receives what is normal.

Which type of water is our control group (not controlled variables)?

i think that d. wind is the answer.   i missed the question when i answered a. currents.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

japan is the correct anwser because i already took the test and i passed it