Quarter 2 - Science

• what energy flows from hotter objects to colder objects?

  Heat
• the average kinetic energy of the particles in a given sample of a substance?

  Temperature
• What is the SI Unit of heat?

  Joule
• A temperature can be measured by the use of a?

  Thermometer
• What is the SI unit of temperature?

  Kelvin
• the energy possessed by an object due to its motion?

  Kinetic energy
• the energy possessed by an object due to its position?

  Potential energy
• Lower internal energy means?

  Cold
• Higher Internal Energy means?

  Hot
• The is the freezing point of water?

  0 degrees Celsius
• What is the boiling point of water?

  100 degrees Celsius
• What is the increase of volume and size due to heat?

  Thermal Expansion
• In what state of matter is the thermal expansion very high?

  Gas
• In that state of matter is the thermal expansion very low?

  Solids
• The high of temperature increases what?

  Kinetic energy
• Does heating a substance always raises its temperature?

  No
• What is the heat that absorbed/released by a substance which changes its state without change of temperature?

  Latent heat
• What is the amount of heat required to raise the temp of a UNIT MASS of substance by 1 degree celcius?

  Specific heat
• The symbol T2 means?

  final temp of substance
• what does the symbol T1 mean?

  Initial temp of substance
• What is the symbol for heat gained?

  Q
• what is the symbol for Mass?

  M
• What is the symbol for specific heat?

  C
• What is the formula for specific heat?

  C = Q/M x (T2 - T1)
• What is the amount of heat required to raise the temperature of a substance by 1 degrees Celcuis?

  Heat capacity
• What is the formula for Heat Gained?

  Q = M x C x T2 - T1
• In finding the Loss or gain of heat we can indicate if it is a LOSS if the product we got is negative.
• In finding the Loss or gain of heat we can indicate if it is a GAIN if the product we got is positive
• what is the sum of kinetic and potential energy possessed by the particles of a substance?

  internal energy
• When we put the switch ON, free electrons in the metal conductors, start flowing through the circuit. these free electrons are the electric charges. the flow of charges in the electric circuit forms an electric current.
• what is the amount of charges flowing through a particular cross section of the conductor per unit time? or the rate of flow of charges?

  Electric current.
• electric current is measured by a device called?

  Ammeter
• electrons flow from the negative to positive terminal of an electric cell in a circuit
• conventional electric current is said to flow from positive to negative terminals in a circuit.
• What is the symbol for current?

  I
• what is the symbol for charge?

  Q
• what is the symbol for time?

  T
• What is the SI unit of current?

  Ampere
• what is the SI unit of charge?

  Coulomb
• The formula for charge is?

  Q = I x T