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Chemistry LibreTexts

1.1 Unit 1 Exam

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    184206
  • cc_profilecc.exam.v0p1qmd_assessmenttypeExaminationqmd_scoretypePercentagecc_maxattempts1
    cc_profilecc.multiple_choice.v0p1Scientists use observations and data to form and testconstants.hypotheses.theories.conclusions.2100cc_profilecc.multiple_choice.v0p1During an experiment, which factors are observed and measured?dependent variablesindependent variablesconstantshypotheses5100cc_profilecc.multiple_choice.v0p1Which phrase best describes scientific theories?explain few observationsserve as speculationsare never provencannot be replaced11100cc_profilecc.multiple_choice.v0p1All the chemical processes used to build up or break down materials are called an organism'smetabolism.homeostasis.adaptations.stimuli.13100cc_profilecc.multiple_choice.v0p1What is the name given for genetic changes in living things over time?adaptationhomeostasisevolutionnegative feedback19100cc_profilecc.multiple_choice.v0p1Organisms rely on both negative feedback processes and behavior to maintainhomeostasis.adaptations.ecosystems.evolution.21100cc_profilecc.multiple_choice.v0p1How have computer models expanded biological research?They help scientists design better experiments.They simulate complex biological systems that cannot be studied directly.They give scientists the ability to observe molecules directly.They allow the use of human experimental subjects.26100cc_profilecc.multiple_choice.v0p1Exploring how indoor air pollutants lead to respiratory problems is an example of using biology todevelop biotechnology.monitor global change.improve human health.make ethical decisions.31100cc_profilecc.multiple_choice.v0p1The smallest basic unit of matter is themolecule.atom.compound.cell.34100cc_profilecc.multiple_choice.v0p1Which of the following is formed when an atom gains or loses electrons?elementcompoundmoleculeion40100cc_profilecc.multiple_choice.v0p1Atoms in molecules share pairs of electrons when they makecovalent bonds.ionic bonds.hydrogen bonds.polymers.41100cc_profilecc.multiple_choice.v0p1What gives water many properties that are important to living things?temperaturehydrogen bondsdensityspecific heat46100cc_profilecc.multiple_choice.v0p1Which of the following solutions has the highest H ion concentration?a solution with a pH of 1a solution with a pH of 4a solution with a pH of 7a solution with a pH of 1049100cc_profilecc.multiple_choice.v0p1What is unique about carbon?bonding propertiesability to bond with oxygenproperties as a reactantproperties as an enzyme53100cc_profilecc.multiple_choice.v0p1The four main types of carbon-based molecules in organisms are carbohydrates, lipids, nucleic acids, andstarches.fatty acids.monosaccharides.proteins.60100cc_profilecc.multiple_choice.v0p1Both animal fats and plant oils are made up of glycerol andphospholipids.fatty acids.polar molecules.saturated fats.62100cc_profilecc.multiple_choice.v0p1Substances are changed into different substances when bonds break and form duringchemical equilibrium.chemical reactions.ion formation.hydrogen bonding.66100cc_profilecc.multiple_choice.v0p1Identify the products in this reaction: 6HO + 6CO + CHO + 6O.6<img width="30" height="26" align="middle" alt="mc036-1.jpg" src="$IMS-CC-FILEBASE$../resources/mc036-1_572a13f0559fb.jpg" border="0"> and 6<img width="28" height="26" align="middle" alt="mc036-2.jpg" src="$IMS-CC-FILEBASE$../resources/mc036-2_572a13f078a16.jpg" border="0">6<img width="28" height="26" align="middle" alt="mc036-3.jpg" src="$IMS-CC-FILEBASE$../resources/mc036-3_572a13f0954b1.jpg" border="0"> and <img width="58" height="26" align="middle" alt="mc036-4.jpg" src="$IMS-CC-FILEBASE$../resources/mc036-4_572a13f0b3543.jpg" border="0">6<img width="30" height="26" align="middle" alt="mc036-5.jpg" src="$IMS-CC-FILEBASE$../resources/mc036-5_572a13f0d6462.jpg" border="0">, <img width="58" height="26" align="middle" alt="mc036-6.jpg" src="$IMS-CC-FILEBASE$../resources/mc036-6_572a13f101040.jpg" border="0">, and 6<img width="18" height="26" align="middle" alt="mc036-7.jpg" src="$IMS-CC-FILEBASE$../resources/mc036-7_572a13f11ea3a.jpg" border="0"><img width="58" height="26" align="middle" alt="mc036-8.jpg" src="$IMS-CC-FILEBASE$../resources/mc036-8_572a13f13eb31.jpg" border="0"> and 6<img width="18" height="26" align="middle" alt="mc036-9.jpg" src="$IMS-CC-FILEBASE$../resources/mc036-9_572a13f15f0cc.jpg" border="0">72100cc_profilecc.multiple_choice.v0p1Chemical reactions that absorb more energy than they release are calledexothermic.catalyzed.endothermic.activated.75100cc_profilecc.multiple_choice.v0p1The activation energy needed for a chemical reaction is decreased by acatalyst.reactant.product.substrate.77100cc_profilecc.multiple_choice.v0p1Which aspect of a chemical reaction is affected by enzymes?directionrateequilibriumpH82100cc_profilecc.essay.v0p1qmd_computerscoredNo<p></p> <table class="s_table s_table_border" style="margin-top: 1em;"> <tbody> <tr> <td><span style="font-size: 14px;"><strong>Seedling</strong></span></td> <td><span style="font-size: 14px;"><strong>Soil</strong></span></td> <td><span style="font-size: 14px;"><strong>Soil Appearance</strong></span></td> <td><span style="font-size: 14px;"><strong>Plant Height at 10 Days</strong></span></td> </tr> <tr> <td><span style="font-size: 14px;">1</span></td> <td><span style="font-size: 14px;">potting soil</span></td> <td><span style="font-size: 14px;">damp, light</span></td> <td></td> </tr> <tr> <td><span style="font-size: 14px;">2</span></td> <td><span style="font-size: 14px;">sand</span></td> <td><span style="font-size: 14px;">dry, course</span></td> <td></td> </tr> <tr> <td><span style="font-size: 14px;">3</span></td> <td><span style="font-size: 14px;">clay</span></td> <td><span style="font-size: 14px;">wet, heavy</span></td> </tr> </tbody> </table> <p style="line-height: 16.8px;"><span style="font-size: 16px;">Write a possible hypothesis for this experiment.</span></p>100cc_profilecc.essay.v0p1qmd_computerscoredNo<p><span style="font-size: 16px;">Organisms need to maintain homeostatis, or stable internal condition. </span></p> <p><span style="font-size: 16px;">Why is homeostasis important for the function of enzymes?</span></p>100cc_profilecc.essay.v0p1qmd_computerscoredNo<p><span style="font-size: 16px;">Why might fatty acids, amino acids, and nucleid acids increase the hydrogen ion (H<sup>+</sup>) concentration of a solution? Explain your answer.</span></p>100cc_profilecc.essay.v0p1qmd_computerscoredNo<p><span style="font-size: 16px;">Why is the statement "all life is made of cells" an example of a theory? Explain.</span></p>100