Technology can have positive and negative effects. what is one negative effect of spraying a chemical pesticide on crops? a. it kills all insect pests. b. it does not wash off in rain. c. it lowers the cost of food. d. it gets in the bodies of farm animals. what is the answer

C. It lowers the cost of food.

Explanation:

A chemical pesticide is a chemical formulation which is used to kill insects and pests feeding upon the crop. It is capable of reducing and even entirely eliminating the infesting insect colonies.  

Apart from the positive effects of the technology with the use of chemical pesticides. One negative effect is the chemical pesticide can lower the cost of food. This is because of the fact that the chemical pesticide can deteriorate the quality of the food. It can distort the color, shape and appearance and even can change the taste hence will lower the cost of the food.    

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.