1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ivahew [28]
3 years ago
12

Experiment You want to determine which disinfecting spray kills off more germs, Clorox or Lysol. You spray two counters with jui

ce 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.
Questions
Name the Independent and Dependent Variables from the experiment above.
Name two good Control Variables you would keep track of in this experiment. 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.
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?)
Biology
1 answer:
lyudmila [28]3 years ago
6 0

The independent variable (<em>action of the disinfecting sprays Clorox and Lysol</em>) always produces a change in the dependent variable (<em>Germ survival or growth</em>). However, the control variable produce no changes on the results (<em>temperature, light exposure, time</em>). You state a hypothesis to predict what is goint to occur (<em>Clorox is more efficient in desib¡nfecting surfaces than Lysol</em>).

---------------------------------------------------------------

During an experiment, the researcher applies different treatments to the experimental groups to analyze their response. It is also useful to have a control group to observe how it responds when no treatment is applied. In these situations, the researcher compares three groups: a control group and two experimental groups. All the groups are identical in all aspects except for the independent variables.  

  • The control group is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment. The <em>independent variable keeps constant in the control group.  </em>
  • The experimental group receives the treatment. The researcher voluntarily changes the values of the independent variable to observe how it affects the dependent variable.<em> There can be several experimental groups.</em>
  • Independent (manipulated) variable: <em>Refers to all the variables in an experiment that provoke a response in another variable.</em> An independent variable is the one that changes or is modified to analyze its <em>effects </em><em>on  another variable</em>. The researcher changes on purpose the independent variable to observe the response of the dependent variable.  
  • Dependent variable: Refers to the variable, <em>which response </em><em>depends</em><em> on any change in the </em><em>independent variable</em><em>.</em> It represents a quantity of something which value depends on how the independent variable is modified. The change in the dependent variable might be <em>proportional or inversely proportional </em>to the change in the manipulated variable.  
  • Controlled variables are kept constant in the control groups and the experimental groups. Unlike the independent variable, the controlled variables do not influence the results. These variables do not affect the response of the dependent variable.

⇒ The independent variable → Action of the disinfecting spray Clorox and Lysol

⇒ The dependent variable → Germ survival

⇒ The controlled variables → Environmental temperature, light exposure, time.

To confirm that the experiment is working we just need to compare periodically the three petri dishes to see how microorganisms are growing, if they are.

Hypothesis: Clorox is more efficient in desib¡nfecting surfaces than Lysol.  

-----------------------------

Related link: brainly.com/question/24468408

You might be interested in
In Texas, a man showed up at a medical facility claiming that he felt drunk when he had not ingested any alcohol. Indeed his blo
fredd [130]

Answer:

c. He might have recently had a round of antibiotics that killed the bacteria that usually live in his gut and allowed a yeast species to overgrow. Put him on probiotics and a low carb diet for a week and recheck his blood alcohol.  

Explanation:

This patient may have taken some antibiotics to contain any infection he was having. Antibiotics are medicines with a high power against bacteria. These medications can only be taken with medical supervision because they can kill all bacteria in the body and our gut has beneficial bacteria that help us during digestion.  Probably the antibiotic that the man took killed all the bacteria present in his gut and this allowed for a proliferation of yeast that started an alcoholic fermentation caused the sensation of being alcoholized to the man.

The ideal thing to do with this patient is to prescribe probiotics and put him on a low-carb diet for a week and recheck the blood alcohol.

4 0
3 years ago
Which type of musical piece describes nature? Question 1 options: A program music B nature music c sacred music D serenade
liq [111]

Answer:

Program music hope this helps

Explanation:

7 0
3 years ago
Read 2 more answers
28. Select all accurate statements
DIA [1.3K]

Answer:

its A but I am not sure I just tried

3 0
3 years ago
Read 2 more answers
Environmental catastrophes can cause changes to the Earth’s surface.
lina2011 [118]
True
Because one of the environmental catastrophes is dust bowl
3 0
3 years ago
Read 2 more answers
What is a bathyscaphe?
Dafna11 [192]
<span>I believe the answer is this:
A free-diving vessel used to explore the ocean at great depths.
Hope this helps.</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • List the charge mass and location of each of the subatomic particles found within atoms
    5·1 answer
  • Match the nutrient molecules with there breakdown products
    10·2 answers
  • DNA _____. cannot determine behavior traits is enclosed by a nuclear membrane in prokaryotes contains coded information for the
    10·2 answers
  • A beetle from a foreign country enters New York's Central Park. As a result, one of the tree species becomes ravaged by the beet
    7·2 answers
  • What indicates the gene combination of an individual?
    14·1 answer
  • Wilkins and Franklin were responsible for discovering important information about what aspect of DNA? A.Its shape B.Its molecula
    14·2 answers
  • I need the answer please thank u
    15·1 answer
  • When chromosomes begin to coil and condense, the cell is in _____. g0 phase g1 phase g2 phase s phase?
    15·2 answers
  • Which statement about mitosis is true? (brainliest)(15points)
    8·2 answers
  • explain how blood flow in the skin helps to maintain a constant body temperature in very hot conditions.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!