It is January and Haley, Sarah and Becky are tired of having cold feet while waiting for the school bus to come in the morning. They all wore nylon socks, and thought that a material such as wool would be better at keeping their feet warm. They decided to design an
experiment to test the effectiveness of wool, cotton and nylon as insulators. They fill identical bottles with 200 ml of water at 100 C
and place inside each sock
What observation is being made?

not sure if this what   you'r looking for would be percent composition

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u