A scientist performs an experiment to see how plants respond to acid rain. He places the water plants in water of varying pH measurements. The pH levels are 2.5, 6.0, 7.0, and 9.0. Each day, he measures the health of the plants by counting the number of leaves on the plant. The plants used in this experiment typically grow in water at a neutral pH.
Why was only one variable tested in this experiment?
The scientist tested one variable to determine what caused the number of leaves to change.
It just happened that way; you can test as many variables as you want.
The scientist ran out of materials so he tested only one variable.
The scientist tested two variables.
Solved
Show answers
More tips
- S Style and Beauty Ultimate Guide on How to Care for Suede Shoes...
- S Sport Running: How to Do It Right?...
- F Food and Cooking How to Cook Spaghetti Right – Secrets and Tips...
- P Philosophy Personal attitude towards Confession: how to prepare and undergo the procedure correctly?...
- H Health and Medicine Flu: How to Recognize It by the First Symptoms?...
- F Food and Cooking How to Sober Up Quickly? Important Facts and Tips...
- H Health and Medicine How to Properly Take a Blood Sugar Test?...
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
Answers on questions: Biology
- B Biology Which series reveal the source of energy for coal? coal chemicals sun coal plants chemicals coal animals suncoal plants sun...
- B Biology Charles Darwin’s observation that finches of different species on the Galápagos Islands have many similar physical characteristics supports the hypothesis that these finches...
- B Biology Part 1: Designing Solutions 1.Describe the two phenomena (sub-problems) that caused the contamination of Cleveland’s drinking water. 2.What criteria (data points) were the NOAA...
- B Biology Which system runs perpendicular to the myofibril and functions with the triad as a microtransportation network to spread the action potential from the fiber s outer membrane inward...
- B Biology Match the appropriate traits with the corresponding category of land plants. Mosses (Bryophyta), Liverworts (Hepatophyta), Hornworts (Anthocerophyta)Lycophytes (Lycopodiophyta),...
- B Biology On the first day after a right pneumonectomy, a client suddenly sits straight up in bed. The client s respirations are labored, and a crowing sound is audible. The client s skin...
- B Biology Approximately 65 million years ago marks the extinction of the dinosaurs, which were the dominant terrestrial vertebrates at the time (and had been for over 100 million years!)....
- B Biology A typical crossing experiment involving three genes in fruit flies might show the percentage of recombinant, or crossover offspring, between the genes taken in pairs to be the...
- B Biology Which of the following correctly arranges the planets by their orbital speeds from slowest to fastest? Jupiter Mercury Saturn Mercury...
- B Biology Select the correct answer. Which statement correctly describes a scientific theory? A. It is accepted as true indefinitely. B. It is based on repeated investigations. C. It is...
Ответ:
The scientist tested one variable to determine what caused the number of leaves to change.
Explanation:
Ответ:
Ancient sandstone beaches become buried deep beneath Earth’s surface, where they are exposed to extreme heat and pressure is the correct answer.
Explanation:
Metamorphic rocks are formed when the preexisting rocks are subjected to high pressure and heat in a method called metamorphism,Metamorphic rocks may be created by being buried below the Earth's surface,when subjected to high heat and high pressure.Metamorphic rocks are derived from igneous or sedimentary rocks. Examples of metamorphic rocks are schist, quartzite, marble, slate, gneiss, and anthracite.Thus Ancient sandstone beaches become buried deep beneath Earth’s surface, where they are exposed to extreme heat and pressure best describes the formation of metamorphic rocks.