Biology, 29.08.2019 16:10 mahmudabiazp3ekot
Astudent wants to answer the question "does adding calcium powder to soil make pea plants grow faster? " she adds calcium powder to the soil of 12 plants and does not add it to the soil of a second group of 12 plants. she measures the growth of all of the plants in each group for a month. which statement best summarizes the factors that need to be controlled in this experiment?
a) all plants should be the same age and health and be given equal amounts of water and sunlight.
b) all plants should be placed in separate, equal-sized pots on the same table, where they receive the same amount of sunlight.
c) all plants should be watered in the morning at the same time each day, and given the same amount of soil and sunlight.
d) all plants should be the same health and be given equal amounts of water, calcium, and sunlight.
Answers: 1
Biology, 22.06.2019 05:30
Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !
Answers: 1
Biology, 22.06.2019 11:00
Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2
Answers: 2
Biology, 22.06.2019 12:30
When rutherford performed his metal foil experiment, he was surprised that most of the alpha particles
Answers: 1
Biology, 22.06.2019 12:30
This is the interaction of two organisms where one is and the other is neither nor harmed.
Answers: 1
Astudent wants to answer the question "does adding calcium powder to soil make pea plants grow faste...
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