Physical Science -First Semester (1st Quarter)
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Questions and Answers

According to Hubble's Law, the recession velocity (v) of a distant extragalactic object is directly proportional to its distance (D). Which equation represents this relationship correctly?

  • v = 1/D
  • v = 1/D^2
  • v = D^2
  • v = D (correct)

    • Which theory explains the formation of elements in the universe?

  • Big Bang Theory (correct)
  • Nucleosynthesis Theory
  • Steady State Theory
  • Supernova Theory

    • What is the main source of energy in stars?

  • Chemical reactions
  • Gravitational collapse
  • Nuclear fission
  • Nuclear fusion (correct)

    • Which process is responsible for the synthesis of heavy elements in stars?

    <p>Supernova nucleosynthesis</p> Signup and view all the answers

    What is the relationship between the recession velocity (v) and the distance (D) in Hubble's Law?

    <p>v = D</p> Signup and view all the answers

    According to Hubble's Law, the recession velocity (v) of a distant extragalactic object is directly proportional to its distance (D). Which equation represents this relationship correctly?

    <p>$v = D$</p> Signup and view all the answers

    What is the relationship between the recession velocity (v) and the distance (D) in Hubble's Law?

    <p>v is directly proportional to D</p> Signup and view all the answers

    Which process is responsible for the synthesis of heavy elements in stars?

    <p>Supernova Nucleosynthesis</p> Signup and view all the answers

    According to Hubble's Law, the recession velocity (v) of a distant extragalactic object is directly proportional to its distance (D). Which equation represents this relationship correctly?

    <p>$v = D$</p> Signup and view all the answers

    What is the relationship between the recession velocity (v) and the distance (D) in Hubble's Law?

    <p>$v \propto D$</p> Signup and view all the answers

    Which process is responsible for the synthesis of heavy elements in stars?

    <p>Supernova Nucleosynthesis</p> Signup and view all the answers

    Which subatomic particle possesses the chemical properties of an element?

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

    What is the formula to calculate the number of neutrons in an atom?

    <p>Neutrons = Atomic Mass - Atomic Number</p> Signup and view all the answers

    Which scientist proposed the atomic theory and defined atoms as indivisible particles?

    <p>John Dalton</p> Signup and view all the answers

    What is the meaning of the word 'alchemy'?

    <p>Ancient Chemistry</p> Signup and view all the answers

    What is the relationship between the atomic number, protons, and electrons in an atom?

    <p>Atomic number = Protons = Electrons</p> Signup and view all the answers

    Which subatomic particle possesses a negative charge?

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

    What is the formula to calculate the number of neutrons in an atom?

    <p>Neutrons = Atomic Mass - Atomic Number</p> Signup and view all the answers

    Which scientist proposed the atomic theory and defined atoms as indivisible particles?

    <p>John Dalton</p> Signup and view all the answers

    According to the formula for calculating the number of neutrons in an atom, which of the following equations is correct?

    <p>Atomic Mass = Protons + Neutrons</p> Signup and view all the answers

    Which scientist proposed the atomic theory and defined atoms as indivisible particles?

    <p>John Dalton</p> Signup and view all the answers

    Which of the following best describes the meaning of the word 'alchemy'?

    <p>The study of ancient chemistry practices</p> Signup and view all the answers

    Which elements are major components of proteins?

    <p>Carbon, hydrogen, oxygen, and nitrogen</p> Signup and view all the answers

    Which building blocks make up proteins?

    <p>Amino acids</p> Signup and view all the answers

    Which macromolecule includes waxes, fats, and oils?

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

    Which macromolecule is essential to all known forms of life?

    <p>Nucleic acids</p> Signup and view all the answers

    Which states of matter are observed in the house?

    <p>Solid, liquid, and gas</p> Signup and view all the answers

    Which of the following is NOT a major component of proteins?

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

    Which of the following is NOT a type of biological macromolecule?

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

    Which of the following is the correct order of protein structure, from simplest to most complex?

    <p>Primary Structure, Secondary Structure, Tertiary Structure, Quaternary Structure</p> Signup and view all the answers

    Which of the following is NOT a major component of proteins?

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

    Which of the following is the correct order of protein structure, from simplest to most complex?

    <p>Primary Structure, Secondary Structure, Tertiary Structure, Quaternary Structure</p> Signup and view all the answers

    Which of the following is NOT a type of biological macromolecule?

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

    Which theory explains how chemical reactions occur and why reaction rates differ for reactions?

    <p>Collision theory</p> Signup and view all the answers

    What is the process called when an element from one reactant switches with an element of the other to form two new reactants?

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

    Which principle of collision theory states that, in order to react, molecules must collide?

    <p>Concentration Effects</p> Signup and view all the answers

    What is the term used to describe the mass relationship in chemical reactions?

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

    What are the two conditions in the balancing equation?

    <p>Stoichiometric Coefficient and Concentration</p> Signup and view all the answers

    Which of the following is a condition in the balancing equation?

    <p>The number of atoms of each element on both sides of the equation must be equal.</p> Signup and view all the answers

    Which type of reaction involves an element from one reactant switching with an element of the other to form two new reactants?

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

    Which principle of collision theory states that molecules must collide in order to react?

    <p>Concentration Effects</p> Signup and view all the answers

    Which of the following is a basic principle of collision theory?

    <p>Molecules must collide in order to react</p> Signup and view all the answers

    What is the term for a chemical reaction where an element from one reactant switches with an element of the other to form two new reactants?

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

    What is the mass relationship in chemical reactions called?

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

    Which of the following types of reactions involves an element from one reactant switching with an element of the other to form two new reactants?

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

    What is the term for a chemical reaction where an element from one reactant switches with an element of the other to form two new reactants?

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

    Which principle of collision theory states that, in order to react, molecules must collide?

    <p>Concentration Effects</p> Signup and view all the answers

    Which type of energy is produced from beneath the Earth's surface?

    <p>Geothermal Energy</p> Signup and view all the answers

    What is the main source of energy for solar cells?

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

    Which type of energy is commonly used throughout the world and is produced from organic material?

    <p>Biomass Energy</p> Signup and view all the answers

    What is the function of batteries in the electric grid?

    <p>All of the above</p> Signup and view all the answers

    Which type of energy is generated by the power of water turning generators?

    <p>Hydroelectric Energy</p> Signup and view all the answers

    Which of the following energy sources relies on the slow decay of radioactive particles to produce high temperatures?

    <p>Geothermal Energy</p> Signup and view all the answers

    Which energy source can convert sunlight into electricity using devices called solar cells?

    <p>Solar Cells</p> Signup and view all the answers

    Which energy source involves the capture of the sun's energy by plants through the process of photosynthesis?

    <p>Biomass Energy</p> Signup and view all the answers

    Which energy source relies on the slow decay of radioactive particles to produce high temperatures inside the Earth's crust?

    <p>Geothermal Energy</p> Signup and view all the answers

    What is the main function of batteries in the electric grid?

    <p>To perform different functions at various points along the electric grid</p> Signup and view all the answers

    Which energy source captures the sun's energy by converting carbon dioxide and water into carbohydrates through photosynthesis?

    <p>Biomass Energy</p> Signup and view all the answers

    Which area of the home is most likely to contain hazardous chemicals?

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

    What are the possible effects of inhaling paint?

    <p>Headaches, nausea, dizziness, and fatigue</p> Signup and view all the answers

    Which hazardous ingredient is commonly found in toilet bowl cleaners?

    <p>Hydrochloric Acid</p> Signup and view all the answers

    What are the possible effects of using furniture polish?

    <p>Skin irritation or burns</p> Signup and view all the answers

    Which area of the home is thought to cause cancer?

    <p>Living room</p> Signup and view all the answers

    What are the possible effects of inhaling paint fumes?

    <p>Headaches, nausea, dizziness, and fatigue</p> Signup and view all the answers

    Which hazardous ingredient is commonly found in bleach?

    <p>Sodium Hypochlorite</p> Signup and view all the answers

    Which cleaning material in the bathroom can cause the formation of corrosive sulfuric acid?

    <p>Toilet Bowl Cleaners</p> Signup and view all the answers

    Which hazardous ingredient can cause nausea, vomiting, shock, convulsions, and coma if swallowed?

    <p>Cationic detergents</p> Signup and view all the answers

    Which cleaning material in the kitchen is corrosive to the skin and suspected of causing cancer?

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

    Which cleaning material in the living room is thought to cause cancer and is associated with brain damage?

    <p>P-Dichlorobenzene</p> Signup and view all the answers

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