Science

• The three main types of cells are plant, animal, and bacteria.
• Cells have different shapes depending on their function.
• Bacteria can be either prokaryotic (no nucleus) or eukaryotic (with a nucleus).
• Animal cells lack cell walls but contain centrioles, lysosomes, mitochondria, ribosomes, and the nucleus.
• Animal cells do not have a cell wall but instead rely on other structures like cytoskeleton or extracellular matrix for support.
• Eukaryotes have membrane-bound organelles while prokaryotes do not.
• Plant cells have a cell wall made up of cellulose to support the cell's shape.
• Cells can be classified based on their shape (eukaryotic or prokaryotic) and function (animal, plant, fungi).
• Scientific theories are based on factual evidence from observations, experiments, and scientific laws.
• Plant cells contain chloroplasts that produce food through photosynthesis.
• The nucleus is responsible for controlling all activities within the cell.
• Different types of cells include animal cells, bacteria, and plant cells.
• The human body is composed of trillions of cells that work together to perform various functions.
• Who is the energetic teacher mentioned in the introduction?

  MJ
• What is the main topic of the lesson discussed in the introduction?

  Heat and temperature
• What does temperature measure in terms of particle energy?

  Kinetic energy
• What happens to the temperature of an object when its particles move faster?

  It increases
• Does the temperature of a substance depend on the amount of the substance present?

  No
• Which of the following is not a unit of temperature?

  Calorie
• What is the normal body temperature in degrees Celsius?

  37 degrees Celsius
• What is the equivalent of 37 degrees Celsius in Fahrenheit?

  99 degrees Fahrenheit
• Are heat and temperature the same in physics?

  No, they are related but not the same
• What is heat defined as in physics?

  A form of energy that transfers from a higher temperature body to a lower temperature body
• How does heat transfer occur between bodies of different temperatures?

  Through conduction, convection, and radiation
• If a metal spoon is dipped in hot water, what process transfers heat to the spoon?

  Conduction
• What happens to your body when you stay close to a bonfire on a cold day?

  Your body absorbs thermal energy through radiation
• What is the SI unit for heat?

  Joule
• What is a calorie defined as in terms of heat?

  The amount of heat needed to change the temperature of one gram of water by one degree Celsius at 1 atm pressure
• What is the normal atmospheric pressure denoted as?

  1 atm
• What is temperature a measure of?

  The hotness or coldness of a body, object, or substance
• What instrument do we use to measure temperature?

  A thermometer
• What does temperature describe in terms of molecular movement?

  The average kinetic energy of molecules
• Who introduced the Celsius scale?

  Anders Celsius
• What are the freezing and boiling points of water on the Celsius scale?

  0 degrees Celsius and 100 degrees Celsius
• Who introduced the Fahrenheit scale?

  Daniel Gabriel Fahrenheit
• What are the freezing and boiling points of water on the Fahrenheit scale?

  32 degrees Fahrenheit and 212 degrees Fahrenheit
• Who introduced the Kelvin scale?

  William Thompson (Lord Kelvin)
• What is absolute zero on the Kelvin scale?


  Zero Kelvin, the lowest possible temperature
• What are the freezing and boiling points of water on the Kelvin scale?

  273 Kelvin and 373 Kelvin
• How does the temperature difference between reference points compare in Celsius and Kelvin scales?

  One Kelvin is equivalent to one degree Celsius