Aura Farm
What did Pasteur's fermentation experiment demonstrate about fermentation?
Fermentation is caused by living organisms rather than occurring spontaneously.
What process involves heating liquids to a specific temperature for a short period to kill harmful microorganisms?
Pasteurization
Whose work contributed to modern food safety and public health?
Louis Pasteur
An iron nail develops a reddish-brown coating after being exposed to air and moisture. What evidence indicates a chemical reaction?
Color change
Vinegar is poured onto crushed eggshells and bubbles form. What evidence of a chemical reaction is observed?
Gas/bubble production
What experiment did Pasteur conduct in 1861 to challenge spontaneous generation?
The Swan-Neck Flask Experiment.
What nutrient is identified as a long-term energy store?
Fats
Before Pasteur's work, what were some commonly proposed explanations for disease?
Bad air or supernatural forces.
What theory states that diseases can be caused by microorganisms such as bacteria and viruses?
Germ Theory of Disease
Zinc is placed in hydrochloric acid and bubbles form while the zinc becomes smaller. What evidence is present?
Gas/Bubble production
A detergent is advertised as effective at removing grease and oil. Which type of ingredient would most directly contribute to this function?
Surfanctants
hat chemical substance commonly found in toothpaste helps prevent tooth decay?
Sodium Fluoride
What product produce in photosynthesis?
Glucose and Oxygen
What was the significance of Pasteur's Swan-Neck Flask Experiment?
It demonstrated that microorganisms come from existing microorganisms rather than spontaneously arising from nonliving matter.
What does the Law of Conservation of Mass state?
Matter cannot be created nor destroyed
Identify the reaction type:
CaO + H₂O → Ca(OH)₂
Combination or synthesis.
Identify the reaction type:
KClO₃ → KCl + O₂
Decomposition
Identify the reaction type:
BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl
Double replacement.
Balance:
Fe₂O₃ → Fe + O₂
2Fe₂O₃ → 4Fe + 3O₂
What part of an equation is changed when balancing?
Coefficient
Identify the types of reaction:
BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl
Double Replacement
A metal reacts with an acid and hydrogen gas is produced. What type of reaction could this represent?
Single Replacement
Balance:
N₂ + H₂ → NH₃
N₂ + 3H₂ → 2NH₃
A chemical equation has the correct substances but unequal numbers of atoms on both sides. What must be done?
Adjust the coefficients to balance the equation.
Balance:
Al + O₂ → Al₂O₃
4Al + 3O₂ → 2Al₂O₃