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28 Sep 2019
1. (TCO1) Evan is setting up an experiment todetermine the effect of light on plant growth. He will set it up asa controlled experiment. This means that (Points : 4)
the experiment isrepeated many times to ensure that the results are accurate.
two experiments areconducted, one differing from the other by two or morevariables.
the experiment proceedsat a slow pace to guarantee that the scientist can carefullyobserve all reactions and process all experimental data.
one experiment isperformed, but the scientist controls the variables.
two experiments areconducted, one differing from the other by only a singlevariable.
Question 2.2. (TCO 1) Each of the following isa testable hypothesis, except (Points : 4)
avoiding contact withother people reduces the chance of catching a cold.
taking zinc lozenges atthe first sign of cold symptoms reduces throat irritation.
being a good driver makesyou less likely to catch a cold.
sleeping 8 hours a nightreduces the severity of a cold.
All of the above
Question 3.3. (TCO 1) April read a magazinearticle that said taking vitamin C supplements will decrease thenumber of colds people have over the winter. She decides to testthis hypothesis by examining the effect of vitamin C on some of hercoworkers compared with what happens with a control group. Which ofthe following would be the best control for this experiment?(Points : 4)
Randomly selectedcoworkers who are given a placebo instead of a vitamin Csupplement
Randomly selectedcoworkers who are given only small doses of vitamin C
Volunteers from theoffice building next door who do not take vitamin C
Volunteers from heroffice who agree to take a placebo instead of vitamin C
Volunteers from theoffice building next door who take vitamin C
Question 4.4. (TCO 2) How do you find the massnumber of an atom? (Points : 4)
Add up the number ofprotons, electrons, and neutrons in the atom.
Add up the number ofprotons and neutrons in the atom.
It is equal to the numberof protons in the atom.
It is equal to the numberof neutrons in the atom.
Find the net electricalcharge of the atom.
Question 5.5. (TCO 2) Which amount of heat isreleased when 75.0 g of water at 0
two experiments areconducted, one differing from the other by two or morevariables. the experiment proceedsat a slow pace to guarantee that the scientist can carefullyobserve all reactions and process all experimental data. one experiment isperformed, but the scientist controls the variables. two experiments areconducted, one differing from the other by only a singlevariable. |
taking zinc lozenges atthe first sign of cold symptoms reduces throat irritation. being a good driver makesyou less likely to catch a cold. sleeping 8 hours a nightreduces the severity of a cold. All of the above |
Randomly selectedcoworkers who are given only small doses of vitamin C Volunteers from theoffice building next door who do not take vitamin C Volunteers from heroffice who agree to take a placebo instead of vitamin C Volunteers from theoffice building next door who take vitamin C |
Add up the number ofprotons and neutrons in the atom. It is equal to the numberof protons in the atom. It is equal to the numberof neutrons in the atom. Find the net electricalcharge of the atom. |
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Tod ThielLv2
28 Sep 2019
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two experiments areconducted, one differing from the other by two or morevariables. the experiment proceedsat a slow pace to guarantee that the scientist can carefullyobserve all reactions and process all experimental data. one experiment isperformed, but the scientist controls the variables. two experiments areconducted, one differing from the other by only a singlevariable. |
taking zinc lozenges atthe first sign of cold symptoms reduces throat irritation. being a good driver makesyou less likely to catch a cold. sleeping 8 hours a nightreduces the severity of a cold. All of the above |
Randomly selectedcoworkers who are given only small doses of vitamin C Volunteers from theoffice building next door who do not take vitamin C Volunteers from heroffice who agree to take a placebo instead of vitamin C Volunteers from theoffice building next door who take vitamin C |
Add up the number ofprotons and neutrons in the atom. It is equal to the numberof protons in the atom. It is equal to the numberof neutrons in the atom. Find the net electricalcharge of the atom. |
|
two experiments areconducted, one differing from the other by two or morevariables. the experiment proceedsat a slow pace to guarantee that the scientist can carefullyobserve all reactions and process all experimental data. one experiment isperformed, but the scientist controls the variables. two experiments areconducted, one differing from the other by only a singlevariable. |
taking zinc lozenges atthe first sign of cold symptoms reduces throat irritation. being a good driver makesyou less likely to catch a cold. sleeping 8 hours a nightreduces the severity of a cold. All of the above |
Randomly selectedcoworkers who are given only small doses of vitamin C Volunteers from theoffice building next door who do not take vitamin C Volunteers from heroffice who agree to take a placebo instead of vitamin C Volunteers from theoffice building next door who take vitamin C |
Add up the number ofprotons and neutrons in the atom. It is equal to the numberof protons in the atom. It is equal to the numberof neutrons in the atom. Find the net electricalcharge of the atom. |
|
two experiments areconducted, one differing from the other by two or morevariables. the experiment proceedsat a slow pace to guarantee that the scientist can carefullyobserve all reactions and process all experimental data. one experiment isperformed, but the scientist controls the variables. two experiments areconducted, one differing from the other by only a singlevariable. |
taking zinc lozenges atthe first sign of cold symptoms reduces throat irritation. being a good driver makesyou less likely to catch a cold. sleeping 8 hours a nightreduces the severity of a cold. All of the above |
Randomly selectedcoworkers who are given only small doses of vitamin C Volunteers from theoffice building next door who do not take vitamin C Volunteers from heroffice who agree to take a placebo instead of vitamin C Volunteers from theoffice building next door who take vitamin C |
Add up the number ofprotons and neutrons in the atom. It is equal to the numberof protons in the atom. It is equal to the numberof neutrons in the atom. Find the net electricalcharge of the atom. |
|
