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ratelena [41]
2 years ago
13

In an experiment to determine the effect of different brands of fertilizer on the rate of plant growth, what are 4 variables tha

t would need to be controlled?
Chemistry
1 answer:
kherson [118]2 years ago
5 0

The variables to control in an experiment to determine the effect of different fertilizers on the rate of plant growth include soil composition, temperature, water, and light.

<h3>What are controlled variables?</h3>

The expression controlled variables makes reference to experimental conditions that must be equal or constant between experimental groups in order to obtain better comparisons when collecting results.

In conclusion, The variables to control in an experiment to determine the effect of different fertilizers on the rate of plant growth include soil composition, temperature, water, and light.

Learn more about controlled variables here:

brainly.com/question/17328868

#SPJ1

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3 years ago
Use complete sentences to differentiate between acids and bases on the basis of touch. Give an example of each type. PLEASE HELP
aleksklad [387]

Explanation:

Bases have a slippery feel when touched but acids do not have a slippery feel.

  • An acid is a substance that interacts with water to produce excess hydroxonium ions, H₃O⁺ in an aqueous solution. Here are some of its properties:
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  2. They have a burning effect on the skin and are highly corrosive on metals.
  3. They have the ability to change the colors of indicators.
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Examples of acids are:

                Hydrochloric acid                  HCl

                Tetraoxosulphate (VI ) acid H₂SO₄

               

  • A base is a substance that interacts with water to produce excess hydroxide ions, OH⁻ in an aqueous solution.
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Examples are:

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                Sodium hydroxide           NaOH

Learn more:

Neutralization brainly.com/question/6447527

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