scientific method and measurements\n19. what are the steps in the scientific method (write in order)?\n20…

scientific method and measurements\n19. what are the steps in the scientific method (write in order)?\n20. what is the correct measurement for the following picture?\n21. what is the correct measurement for the following picture?\n22. if youre heating water and measuring the temperature every minute. what are the dependent and independent variables?\n23. elster wants to test what of a variety of materials is the best insulation from heat from the sun. she wraps 5 jars of water each with a different material. she records their initial temperatures, then sets them out in the sun for 10hrs, and the measures a final temperature of each jar. what are the dependent and independent variables? how can she improve on this experimental design?\n24. put a @ in the definition and picture for \atoms\. put a # in the definition and picture for \compound\. put a $ in the definition and picture for \elements\. put a % in the definition and picture for \mixture\. put a * in the definition and picture for \molecules\.\n25. using the key on the top row of the picture shown below, (1) list how many atoms of each element are in each molecule shown below, then (2) write the chemical formulas for each one.\na.(1)\n(2)\nb.(1)\n(2)\nc.(1)\n(2)\nd.(1)\n(2)\ne.(1)\n(2)\nf.(1)\n(2)

scientific method and measurements\n19. what are the steps in the scientific method (write in order)?\n20. what is the correct measurement for the following picture?\n21. what is the correct measurement for the following picture?\n22. if youre heating water and measuring the temperature every minute. what are the dependent and independent variables?\n23. elster wants to test what of a variety of materials is the best insulation from heat from the sun. she wraps 5 jars of water each with a different material. she records their initial temperatures, then sets them out in the sun for 10hrs, and the measures a final temperature of each jar. what are the dependent and independent variables? how can she improve on this experimental design?\n24. put a @ in the definition and picture for \atoms\. put a # in the definition and picture for \compound\. put a $ in the definition and picture for \elements\. put a % in the definition and picture for \mixture\. put a * in the definition and picture for \molecules\.\n25. using the key on the top row of the picture shown below, (1) list how many atoms of each element are in each molecule shown below, then (2) write the chemical formulas for each one.\na.(1)\n(2)\nb.(1)\n(2)\nc.(1)\n(2)\nd.(1)\n(2)\ne.(1)\n(2)\nf.(1)\n(2)

Answer

Answer:

  1. Observation, Question - formation, Hypothesis - formulation, Experimentation, Data - analysis, Conclusion.
  2. Without seeing the actual measurement markings clearly, it's impossible to give an exact answer. But if it's a liquid - level measurement in a graduated cylinder, read at the bottom of the meniscus.
  3. Similar to 20, without clear view of the markings, no exact answer. Follow the meniscus - reading rule for liquid measurements.
  4. Independent variable: Time (since we are changing the time when we measure the temperature every minute). Dependent variable: Temperature (because it depends on the time and the heating process).
  5. Independent variable: Type of insulating material. Dependent variable: Change in temperature of the water in the jars. To improve the experiment: Use more jars for each material for better statistical significance, control the initial volume and temperature of water in each jar more precisely, and conduct the experiment on a day with consistent sunlight conditions.
  6. Based on the given symbols and definitions: In the definition and picture for "Atoms", put @; for "Compound", put #; for "Elements", put $; for "Mixture", put %; for "Molecules", put *.
  7. Without seeing the key clearly for what each colored sphere represents: A.(1) Need to count the spheres of each type in molecule A to determine the number of atoms of each element. (2) Based on the counts in (1), write the chemical formula (e.g., if there are 2 of one element and 3 of another, it could be $A_2B_3$). B.(1) Count the spheres of each type in molecule B. (2) Write the chemical formula. C.(1) Count the spheres of each type in molecule C. (2) Write the chemical formula. D.(1) Count the spheres of each type in molecule D. (2) Write the chemical formula. E.(1) Count the spheres of each type in molecule E. (2) Write the chemical formula. F.(1) Count the spheres of each type in molecule F. (2) Write the chemical formula.

Explanation:

Step1: Recall scientific - method steps

The scientific method generally follows these steps in order for conducting experiments and investigations.

Step2: Understand measurement principles

For liquid - level measurements in graduated cylinders, the bottom of the meniscus is the correct reading point.

Step3: Identify variables

The independent variable is what is changed in an experiment, and the dependent variable is what is measured and changes as a result of the independent variable.

Step4: Analyze experimental design

To improve an experiment, consider factors like sample size, control of initial conditions, and environmental consistency.

Step5: Match symbols to definitions

Based on the given instructions, match the symbols to the appropriate terms.

Step6: Determine chemical - formula steps

Count the number of atoms of each element in the molecular models and then write the chemical formula accordingly.