Chemistry: Chemistry in Our Lives Flashcards

• Hemoglobin consists of four polypeptide chains each containing a heme group with an iron atom that binds to oxygen in the lungs.
• From the lungs hemoglobin transports oxygen to the tissues of the body where it is used to provide energy.
• Once the oxygen is released, hemoglobin binds to carbon dioxide for transport to the lungs where it is released

• Hemoglobin transports oxygen to the tissues of the body and transports carbon dioxide to the lungs

• When a part of the body is injured, substances called prostaglandins are produced, which cause inflammation and pain
• Aspirins acts to block the production of prostaglandins, thereby reducing inflammation, pain, and fever.

• the study of the composition, structure, properties, and reactions of matter
• happens all around you every day

• all the substances that make up the world
• EXAMPLES:
  • antacid
  • water
  • glass
  • air

• tarnishing of silver
• antacid fizzing when dropped into water
• digesting food breaking it down into substances you need for energy and health

• substances that always have the same composition and properties wherever it is found
• EXAMPLES:
  • shampoo contains chemicals that remove the oil from hair
  • chemicals in toothpaste clean your teeth
  • chemicals in lotion help to moisturize skin

• chemicals added to food to prevent it from spoiling

• used as an abrasive to remove plaque

• prevents loss of water and hardening of toothpaste

• used to loosen plaque

• makes toothpaste white and opaque

• inhibits bacteria that cause plaque and gum disease

• prevents formation of cavities by strengthening tooth enamel with fluoride

• gives toothpaste a pleasant wintergreen flavor

B,C,D

• sunlight is an energy given off by the sun therefore does not contains chemicals

• a set of general principles that helps to describe how a scientist thinks
  1. Observations
  2. Hypothesis
  3. Experiments
  4. Conclusion

• first step in scientific method
• information determined by noting and recording a natural phenomenon
• make observations about nature and ask questions about you observe

• second step in scientific method
• propose a hypothesis
• which states a possible explanation of the observations
• should be stated in a way that it can be tested by experiments

• a procedure that tests the validity of a hypothesis
• several experiments may be done to test the hypothesis

• an explanation of an observation that has been validated by repeated experiments that support a hypothesis
• done when the experiments are analyzed
• conclusion is made as to whether the hypothesis is true or false

• first place to the left of the decimal point

• second place to the left of the decimal point

• first place to the right of the decimal point

• second place to the right of the decimal point

• represents the relationship between two variables
• contains to perpendicular axes
• has a horizontal axis/ x axis
• has a vertical axis/ y axis

• any number that is greater than zero and has a positive (+) sign

• any number that is less than zero and is written with e negative (-) sign

• when two positive or two negative number are multiplied or divided, the answer is positive
• when a positive and a negative number are multiplied or divided, the answer is negative

• when two positive numbers are added ,the answer is positive
• when two negative numbers are added, the answer is negative
• when a positive and a negative are added, the smaller number is subtracted from the larger number and the result has the same sign as the larger number

• when two numbers are subtracted change the sign of the number to be subtracted

• divide the parts by the total (whole) and multiply by 100

1. place all like items on one side
2. isolate the variable we need to solve for
3. check your answer by substituting your value for x back into the original equations

• number has two parts
  1. coefficient
     • has to be at least 1 but less than 10
  2. power of 10
• EXAMPLE:
  • 2400 in scientific notation
  • 2.4 x 10^3

• a form of writing large and small numbers using a coefficient that is at least 1 but less then 10 followed by a power of 10