Science exam review(Sec.3)

• what are atoms?


  The smallest particle of matter that cannot be divided, created, or destroyed.
• What is a solute?


  A substance that can dissolve into another substance.
• What is a solvent?

  A substance that can dissolve a solute.
• What is solubility?


  Maximum amount of solute that can be dissolved in a certain amount of solvent.
• What formula is used to find concentration?

  Concentration=Mass÷Volume (Can be remembered as Music Video)
• what is the formula to find Volume?

  Volume=Mass÷Concentration (Can be remembered as McDonald)
• What is the formula to find Mass?

  Mass=Volume x Concentration (Can be remembered as VCN or CV)
• What are compounds?


  Pure substance that has 2 or more atoms that are combined(one molecule)
• what is an element?

  Substance that cannot be broken down and is made of its own atoms.
• What is an unknown substance?

  A substance that isn't known.
• What is a wave?


  A disturbance that travels through a medium.
• What does a wave transport?

  Energy. It does not transport matter.
• What is a transverse wave?


  A wave that propagates perpendicular to the motion of its medium.
• What is a longitudinal wave?

  A wave that propagates parallel to the motion of its medium.
• What is amplitude?


  Corresponds to the maximum travelled by particle in the medium compared to its position at the equilibrium.
• What is wavelength?


  The length of a wave's complete cycle.
• What is frequency?


  The number of cycles per unit of time.
• What is a mechanical wave?

  A wave that requires a medium in order to propagate.
• What is an Electromagnetic wave?

  A wave that can travel in a vacuum and a medium.
• What is the electromagnetic spectrum?


  It organizes all electromagnetic waves according to their wavelength and frequency.
• What is a sound wave?

  Longitudinal mechanical wave produced by vibrations of an object and transmitted to environment.
• Mass


  The amount of a substance present in the solution
• Volume


  The total volume of the solution
• What is a cell?


  The basic unit of life.
• What are the structures of a cell?(3)

  Cell membrane, cytoplasm, nucleus.
• What are organelles?


  Organized or specialized structures in a cell.
• What is DNA?


  A molecule located inside the nucleus of a cell.
• What are genes?


  A segment of DNA contains the genetic information.
• What is mitosis?


  Process of cell division in which cells multiply to ensure growth and tissue repair.
• How many stages of mitosis are there?

  4
• What are the stages of mitosis?

  Prophase, Metaphase, Anaphase, Telophase. (PMAT)
• What happens during interphase of mitosis?

  Preparation for cell division.
• What happens during prophase of mitosis?

  The nuclear membrane disappears.
• During prophase of mitosis how does the DNA look like and what does it do?


  DNA strands coil and condense to form chromosomes.
• What happens during metaphase of mitosis?

  Chromosomes align at the middle of the cell
• What happens during anaphase of mitosis?

  Chromosomes separate into chromatids and move to opposite poles of the cell.
• What happens during telophase of mitosis?

  A new nuclear membrane forms and the cell divides into two cells.
• What does the DNA do during telophase of mitosis?

  It uncoils into separate strands.
• What is meiosis?


  Process of cell division that produces gametes for sexual reproduction to take place.
• What are gametes?


  Sex cells.