Experiment You want to determine which disinfecting spray kills off more germs, Clorox or Lysol. You spray two counters with juice from raw chicken. Then you spray one counter with Clorox and one with Lysol. After the solutions dry, you wipe a cotton ball on the Clorox counter and then wipe it onto a petri dish. You do the same with the Lysol counter and wipe it onto a separate petri dish. You let the plates grow bacteria for several days, then count which plate has more colonies of bacteria.
1. Name the Independent and Dependent Variables from the experiment above.
2. Name two good Control Variables you would keep track of in this experiment.
3. This experiment needs a Positive Control Experiment. (This means at least one more counter and petri dish.) Describe what you would do to confirm that you can measure your experiment is working as expected.
4. Create a hypothesis for this experiment. Remember that a good hypothesis doesn't have to be right, it just has to follow the rules. (Which spray will kill off bacteria best?)

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

What is an endocrine function? (apex) a. esophageal glands release mucus into the esophagus b. salivary glands release saliva into mouth c. swear glands release sweat to the skin d. the pineal gland releases melatonin into the bloodstream

Consider the motion of the balloon and its air contents in terms of momentum. in step 1 above, the total momentum of the balloon and its contents was zero. recall that momentum = mv. both the balloon and the air inside it had a velocity of zero and therefore the total momentum was zero. now think about what happened when the air escaped from the balloon. a certain mass of air accelerated in one direction. in order to keep the total momentum of the system zero, the balloon itself (which has mass) had to accelerate in the opposite direction. use this scenario to you explain why the soda can rotates when the water squirts out of the escape holes. what was your hypothesis concerning the water-filled can? according to your data, do you think your hypothesis was correct? (be sure to refer to your data when answering this question.) summarize any difficulties or problems you had in performing the experiment that might have affected the results. describe how you might change the procedure to avoid these problems. give at least one more example of newton's third law in everyday life.