Identify from the following list which examples are controlled experiments. You make two pitchers of lemonade and -only change the amount of lemonade mix you add.
-only change the amount of water you add.
-change both the amount of water and the amount of lemonade.

The answer is A&B

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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your spelling is a little off : ]

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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