The Contribution of Van Helmont to the Study of Plant Nutrition

Who conducted an experiment to learn how plants received their nutrition?

What did Van Helmont want to understand?

• How plants produced their fruits

• How plants could survive under severe conditions

• How plants received their nutrition

What is the name of the plant he used for the experiment?

Find the incorrect statement:

• He put a willow with a mass of 2.3 kg in a planter

• He observed how the willow grew

• After 5 years he took the three from the planter and measured

• The dry soil had more mass at the end of the experiment than at the beginning.

What did the dry soil weight at the beginning of the experiment?

• 90.71 kg.

• 2.3 kg

• 90.66 kg.

What did the dry soil weight at the end of the experiment?

• 90.71 kg.

• 2.3 kg

• 90.66 kg.

Answer explanation

At the end of the experiment, the dry soil wighted less (pesó menos) than at the beginning because it gave its nutrients to the plant.

How much time did the experiment take?

• 5 hours

• 5 months

• 5 years

What things did Van Helmont use to water the plant?

• Normal water

• Rainwater

• River water

• Water and some natural fertilizers

At the end of the experiment, the willow increased in mass and the dry soil decreased in mass.

• True

• False

What were Van Helmont's conclusions of his experiment?

• He said that the plant grew thanks to the photosynthesis

• He said that the plant grew thanks to water and sunlight

• He said that the plant grew thanks to water