Question 1. 1. (TCO 1) Each of the following is a testable hypothesis, except (P
ID: 873491 • Letter: Q
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Question 1. 1. (TCO 1) Each of the following is a testable hypothesis, except (Points : 4) avoiding contact with other people reduces the chance of catching a cold.taking zinc lozenges at the first sign of cold symptoms reduces throat irritation.
being a good driver makes you less likely to catch a cold.
sleeping 8 hours a night reduces the severity of a cold.
All of the above Question 2. 2. (TCO 1) April read a magazine article that said taking vitamin C supplements will decrease the number of colds people have over the winter. She decides to test this hypothesis by examining the effect of vitamin C on some of her coworkers compared with what happens with a control group. Which of the following would be the best control for this experiment? (Points : 4) Randomly selected coworkers who are given a placebo instead of a vitamin C supplement
Randomly selected coworkers who are given only small doses of vitamin C
Volunteers from the office building next door who do not take vitamin C
Volunteers from her office who agree to take a placebo instead of vitamin C
Volunteers from the office building next door who take vitamin C Question 3. 3. (TCO1) Evan is setting up an experiment to determine the effect of light on plant growth. He will set it up as a controlled experiment. This means that (Points : 4) the experiment is repeated many times to ensure that the results are accurate.
two experiments are conducted, one differing from the other by two or more variables.
the experiment proceeds at a slow pace to guarantee that the scientist can carefully observe all reactions and process all experimental data.
one experiment is performed, but the scientist controls the variables.
two experiments are conducted, one differing from the other by only a single variable. Question 4. 4. (TCO 2) Which of the following is a physical property of both liquids and solids? (Points : 4) Has its own shape
Has slow moving particles
Has strong interactions between its particles
Has randomly arranged particles
Has large spaces between the molecules Question 5. 5. (TCO 2) A single-serve box of cereal contains 40 g of carbohydrate. How many kcal are obtained from the carbohydrate in the cereal? (Points : 4) 10 kcal
20 kcal
40 kcal
360 kcal
160 kcal Question 6. 6. (TCO 2) An isotope of potassium has a mass number of 39. How many neutrons are present in this isotope? (Points : 4) 19
20
24
44
58
Question 7. 7. (TCO 2) Which of the following statements about the periodic table is incorrect? (Points : 4) A period is a horizontal row on the periodic table.
A group is a column on the periodic table.
The elements in each period have similar chemical properties.
The A groups contain the representative elements.
The B groups contain the transition elements. Question 8. 8. (TCO 3) During cellular respiration, energy is released. Cellular respiration is classified as a(n) _____. (Points : 4) catalyzed reaction
exothermic reaction
decomposition reaction
endothermic reaction
oxidation-reduction reaction Question 9. 9. (TCO 3) Which of the following bonds would you predict to be polar covalent? (Points : 4) C-P
Li-F
Br-P
Na-Cl
C-H Question 10. 10. (TCO 3) How many atoms of phosphate are found in a molecule of Zn3(PO4)2? (Points : 4) Two
Four
One
Eight
Three Question 11. 11. (TCO 4) A solution has a pH of 3.0. The [H3O+] in this solution is (Points : 4) 3 M.
30 M.
1 Question 1. 1. (TCO 1) Each of the following is a testable hypothesis, except (Points : 4) avoiding contact with other people reduces the chance of catching a cold.
taking zinc lozenges at the first sign of cold symptoms reduces throat irritation.
being a good driver makes you less likely to catch a cold.
sleeping 8 hours a night reduces the severity of a cold.
All of the above
Explanation / Answer
Questions relating to Chemistry only are being answered as below -
Q- 1.1 being good driver makes you less likely to catch cold.
Q, 2,2 randomely selected coworkers who are given placebo instead of vitamin C supplement.
Q- 3,3 two experiments are conducted one differing from other by only a single variable.
Q- 4,4 Has randomly arranged particles.
Q- 5.5 160 kcal.
Q- 6.6 20
Q,- 7.7 B group contains transition elements.
Q- 8.8 Exothermic reacttion
Q - 9,9 C - H
Q - 10 10 - Two
Q, 11.11 - 1 x 10-3 M
Q. 12.12 - extremely aciidic
Q , 13,13 - can be a solid , liquid or gas.
Q, -14.14 - a carboxylic acid
Q.- 15.15 starch is easily digested but a few animals can break down cellulose .
Q- 19..19 Oxygen
Q- 20.20 .Glucose + Oxygen > CO2 + water + energy
Q, 21,21 none of the above.
Q,22.22 ethyl alcohol
Note-
A few left out questions are more related to Biology,
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