COPY: Chemistry Basics Quiz
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COPY: Chemistry Basics Quiz

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@HopefulSelenium

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Questions and Answers

What did Leucippus and Democritus infer about all living and inanimate things?

  • They are composed of continuous substance that cannot be divided.
  • They are composed of indivisible and invisible particles called atoms. (correct)
  • They are composed of various elements that can be separated easily.
  • They are composed of visible particles called molecules.

    • Why is a basic understanding of chemistry important for many subjects such as biology?

  • To know the different chemical reactions occurring in the human body.
  • To identify the elements present in nonliving things.
  • To understand the composition of matter in living organisms. (correct)
  • To analyze the physical properties of living organisms.

    • What is matter?

  • Energy present in all living and nonliving things.
  • The physical form of elements found in nature.
  • Substances that are visible to the naked eye.
  • Anything that has weight and occupies space. (correct)

    • Why does intuition suggest that all substances are made of minute particles?

    <p>Due to observations such as evaporation, erosion, and growth of living things.</p> Signup and view all the answers

    What is the modern particulate nature of matter based on?

    <p>The idea that matter is composed of indivisible particles called atoms.</p> Signup and view all the answers

    According to John Dalton's atomic theory, what is the nature of atoms?

    <p>Atoms are made up of indivisible particles</p> Signup and view all the answers

    Which phenomenon is characterized by the flow of matter from a region of lower concentration to a region of higher concentration through a semi-permeable membrane?

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

    Who identified the negatively charged electron in the cathode ray tube and deduced its properties?

    <p>J.J. Thomson</p> Signup and view all the answers

    What is the constant erratic or non-directional movement of tiny particles suspended in a medium known as?

    <p>Brownian motion</p> Signup and view all the answers

    According to J.J. Thomson's observations, how did the rays in the cathode ray tube behave?

    <p>Rays were deflected by an electrostatic field towards the negative plate</p> Signup and view all the answers

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