For #1-3 below, identify the independent variable, dependent variable and at least 3 variables that need to be controlled.
1. A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly.
Independent variable:
Dependent variable:
Controls:
2. Two groups of students were tested to compare their speed working math problems. Each group was given the same problems. One group used calculators and the other group computed without calculators.
Independent variable:
Dependent variable:
Controls:
3. An experiment was performed to determine how the amount of coffee grounds could affect the taste of coffee. The same kind of coffee, the same percolator, the same amount and type of water, the same perking time, and the same electrical sources were used.
Independent variable:
Dependent variable:
Controls:
4. Given an independent variable of light and a dependent variable of plant growth, come up with a description of an experiment and at least 3 controlled variables.
1
Answers: 3
Chemistry, 21.06.2019 21:00, jasminortega2002
Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o
Answers: 1
Chemistry, 22.06.2019 06:00, VamPL
Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl +4h2o enter the elemental symbol. view available hint(s) is reduced
Answers: 1
Chemistry, 22.06.2019 09:00, Ezekielcassese
What is the percentage composition of carbon in the compound ch4
Answers: 1
For #1-3 below, identify the independent variable, dependent variable and at least 3 variables that...
History, 28.11.2019 18:31
History, 28.11.2019 18:31