Sarah is testing the effect of pollution on plants. She has 50 tomato plants. 1 point
Group 1 contains 25 plants grown away from the source of pollution. The
other 25 plants, or group 2, grow in the presence of pollution. Sarah makes
sure all of the plants get the same amount of water, sunlight exposure, and
fertilizer. For 1 month, she observe the plants weekly. Her observations
include how the plants look and changes in plant height. Sarah's data
shows that plants in the experimental group all had stunted growth (short)
and poor leaf color (yellow). What is the independent variable? *
Pollution
Sunlight
Fertilizer
Answers: 3
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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 !
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Sarah is testing the effect of pollution on plants. She has 50 tomato plants. 1 point
Group 1 cont...
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