12 Questions
What is the purpose of using herbicides on fields?
To kill weeds that compete with crops for water, space, and nutrients.
Explain why farmers use insecticides on their crop fields.
To remove harmful insects that can damage the crops.
Why is it mentioned that hand-pulling weeds raises humanitarian issues?
Due to concerns regarding working conditions and related humanitarian factors.
What are some examples of pests that pesticides are used to control?
Weeds, insects, fungi, and rodents.
Why is it stated that the phrase 'chemical free' is a marketing gimmick?
Because all substances, including natural ones, are chemicals.
Why do farmers use herbicides to control weeds instead of alternatives like hand-pulling or tillage?
To promote crop growth and higher productivity while avoiding issues like erosion and degraded soil structure.
What is a chemical according to one good definition?
A form of matter having constant chemical composition and characteristic properties.
What is a chemical bond?
A strong association between two different atoms.
What was initially thought to be the smallest component of matter?
Atoms.
What information can be found on a Periodic Table of Elements?
Atomic weight and atomic mass.
What does chemistry focus on in terms of atoms and elements?
The characteristics, interactions, bonding, and performance of atoms and elements.
How is the colloquial use of the word 'chemical' different from its scientific definition?
In everyday language, 'chemical' is often associated with hazardous or strange substances, while in science, everything is considered a chemical.
Explore common questions about the use of chemicals in agriculture and their presence in food. Learn about the types of chemicals used, their effects, and the definition of a chemical.
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