Science Quiz on Methods and Reactions
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Questions and Answers

What is the correct sequence of the scientific method components?

  • Method, Aim, Results, Conclusion, Discussion, Reference List
  • Aim, Method, Results, Discussion, Conclusion, Reference List (correct)
  • Results, Aim, Discussion, Conclusion, Method, Reference List
  • Hypothesis, Aim, Results, Reference List, Method, Conclusion

    • Which variable in an experiment is the one being changed intentionally?

  • Independent Variable (correct)
  • Controlled Variable
  • Random Variable
  • Dependent Variable

    • What does reliability in an experiment refer to?

  • The experiment is performed multiple times and yields the same results. (correct)
  • The results are presented in a clear graph format.
  • All variables are kept constant throughout the experiment.
  • The experiment measures what it is supposed to measure correctly.

    • Which of the following accurately describes gravity?

    <p>It is a force that depends on the distance between two objects.</p> Signup and view all the answers

    Which type of graph is best used to compare quantities between different groups?

    <p>Column graph</p> Signup and view all the answers

    How is weight defined in a physics context?

    <p>The gravitational force acting on an object's mass.</p> Signup and view all the answers

    When can forces be described as balanced?

    <p>When they have different directions but equal sizes.</p> Signup and view all the answers

    In the equation $W = mg$, what does 'W' represent?

    <p>Weight of an object.</p> Signup and view all the answers

    What is the process called when one substance breaks down to form two or more new substances?

    <p>Decomposition</p> Signup and view all the answers

    In the chemical equation $4Fe + 3O_2 → 2Fe_2O_3$, what does 'Fe' represent?

    <p>Iron</p> Signup and view all the answers

    Which reaction type involves two molecules switching to form two new substances?

    <p>Double displacement</p> Signup and view all the answers

    What type of reaction results in the formation of an insoluble solid?

    <p>Precipitation</p> Signup and view all the answers

    Which of the following describes a Nebula?

    <p>A cloud of gas and dust in outer space</p> Signup and view all the answers

    Which of the following best describes a black hole?

    <p>A region of space with intense gravitational pull</p> Signup and view all the answers

    How can you achieve balancing in chemical equations?

    <p>By adjusting the coefficients in front of formulas</p> Signup and view all the answers

    Which star color typically indicates a higher temperature?

    <p>Blue</p> Signup and view all the answers

    What is the characteristic of Homozygous Recessive genotypes?

    <p>Carries two copies of the recessive allele (bb)</p> Signup and view all the answers

    In a Punnett Square, what is its primary use in genetics?

    <p>To determine the probability of offspring phenotypes</p> Signup and view all the answers

    Which statement best describes codominance?

    <p>Both alleles are equally visible in phenotype</p> Signup and view all the answers

    What describes the flow of electrons in a direct current (D.C.) circuit?

    <p>Electrons flow in the same direction</p> Signup and view all the answers

    What is one essential component that must be present for electrons to flow in a circuit?

    <p>A closed circuit</p> Signup and view all the answers

    What is the formula to calculate average acceleration?

    <p>a = (v - u) ÷ t</p> Signup and view all the answers

    Which of the following statements correctly defines displacement?

    <p>It is a vector quantity that includes direction from the starting point.</p> Signup and view all the answers

    What does Newton's 2nd Law of Motion describe?

    <p>Acceleration is dependent on force and mass.</p> Signup and view all the answers

    Which of the following best describes a catalyst?

    <p>A substance that changes the rate of a chemical reaction but remains unchanged.</p> Signup and view all the answers

    What is the key difference between compounds and mixtures?

    <p>Compounds are made of two or more different atoms chemically bonded, mixtures are not.</p> Signup and view all the answers

    Which of these is an example of an exothermic reaction?

    <p>Combustion of fuel.</p> Signup and view all the answers

    Which unit is used to measure acceleration?

    <p>m/s^2</p> Signup and view all the answers

    What is the form of energy involved in endothermic reactions?

    <p>It absorbs energy.</p> Signup and view all the answers

    What determines the acceleration of an object according to Newton's 2nd Law?

    <p>The net force acting on the object and its mass.</p> Signup and view all the answers

    How do you calculate average velocity?

    <p>v = s ÷ t</p> Signup and view all the answers

    What is the sequence of three nitrogen bases in mRNA called?

    <p>Codon</p> Signup and view all the answers

    What occurs during the process of transcription?

    <p>RNA forms from DNA</p> Signup and view all the answers

    What is the result of crossing over during meiosis?

    <p>Genetic variation among chromosomes</p> Signup and view all the answers

    Which type of mutation results in the addition of a base to the DNA sequence?

    <p>Insertion</p> Signup and view all the answers

    What is the main function of spindle fibers during mitosis?

    <p>To separate sister chromatids</p> Signup and view all the answers

    Which statement accurately describes a dominant trait?

    <p>It is always expressed regardless of the second allele.</p> Signup and view all the answers

    What defines a genotype?

    <p>The genetic makeup of an organism</p> Signup and view all the answers

    How many chromosomes are present in normal human somatic cells?

    <p>46</p> Signup and view all the answers

    Which part of the cell does protein synthesis primarily take place?

    <p>Cytoplasm</p> Signup and view all the answers

    What is the purpose of mitosis?

    <p>To facilitate asexual reproduction and growth</p> Signup and view all the answers

    What is the role of a mutagen?

    <p>To cause changes in DNA</p> Signup and view all the answers

    What specifically happens during anaphase of mitosis?

    <p>The sister chromatids are pulled apart toward opposite poles.</p> Signup and view all the answers

    What does heredity refer to?

    <p>The transfer of traits from parent to offspring</p> Signup and view all the answers

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