Unit 1 Thermal Energy
Unit 1 Thermal Energy
What is condensation?
Heat is thermal energy moves from
List three ways that heat can transfer.
conduction, convection, radiation
of an object is a measure
of the average kinetic energy of the
particles of the object.
Explain why increasing the temperature
of an object increases its thermal
increasing the temperature increases the kinetic energy of particles
Determine which state of matter makes
the best insulator.
Explain how a jacket with air pockets
acts as a good insulator during winter.
air pockets slow the flow of body heat to the colder outside air
Your grandma needs to put on oven mitts
when taking a hot pan out of the oven.
Determine which transfer of thermal
energy she is being careful to avoid.
conduction - hands on hot pan
Which of the following are good
conductors of heat:
Energy from the sun is
Wind and ocean currents are formed by
What type of heat transfer does NOT require the presence of matter particles.
radiation doesn't need particles
Explain how heat is transferred in convection?
Heat is transferred by the movement of currents within a fluid.
A material that reduces the flow of heat is an
Explain why solids and liquids are better conductors of heat than gases.
Particles are close together - more collisions occur allowing them to conduct heat better.
The sum of the
of all the particles in an object.
potential energy, kinetic energy
Refrigerators and air conditioners are examples of
Solar heating systems convert
energy from the sun to
have no definite shape, but do have definite volume.
Plasma is the state of matter that has
Anything that has mass and takes up space
What is evaporation?
change from liquid to gas
With the exception of water, matter
change from gas to liquid
Matter that has a definite shape and a definite volume is a what?
Freezing, boiling and evaporation are
all examples of
What is the temperature called when a solid begins to liquefy?
A testable prediction is a
An idea, event or object that can be used to represent something you are trying to explain is a
Identify the piece of lab equipment you would use to measure 15 mL of water.
In an investigation you put a beaker of water in the sun and measure the temperature every 10 minutes for 1 hour.
What is the dependent variable?
Explain why it is important to do more than one trial in an experiment.
To rule out error (equipment, human, etc.)
An organized procedure for testing a hypothesis is a(n) ___
The amount of space occupied by an object is its
When a conclusion is formed in a science investigation it is based on the
The amount of matter an object has is measured by its
graph shows how a relationship between two variables changes over time.
An organized set of investigation procedures is called the___
is a visual display of information or data.
Identify three types of graphs.
circle, bar, line
Determine the type of variable plotted on the x-axis and the type of variable plotted on the y-axis of a line graph.
x-axis independent; y-axis dependent
Identify the piece of lab equipment you would use to measure 10 grams of sand.
Which of the following is the symbol for gram?
Explain why scientists graph data
Data is graphed to detect patterns
a chemical bond in which atoms share a pair of valence electrons
forces that hold together different molecules
Ionic bond -
a bond formed by the attraction between two oppositely charged ions
Metallic bond -
a bond formed by each atom donating one or more electrons into the
"sea of electrons."
a substance or chemical formed from a metal and a nonmetal
solid particles suspended in a gas.
the transition from a solid to a gas without going through the liquid phase.
Transition point -
the temperature at which a substance changes phase or state.