Thermal Dynamics Quiz

False (B)

Atomic vibrations and free electron collisions

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

<p>Conduction = Solids Convection = Liquids and gases</p> Signup and view all the answers

<p>It becomes less dense. (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>convection current</p> Signup and view all the answers

<p>To increase the radius of the iron rim through thermal expansion (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>To allow for thermal expansion of the rails in hot weather, preventing bending and derailment.</p> Signup and view all the answers

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

<p>Fitting an iron rim on a wooden wheel = Expansion of metal when heated Loosening a metal lid on a glass jar = Expansion of metal when heated Gaps in railway tracks = Expansion of metal when heated Slack in electrical cables = Contraction of metal when cooled</p> Signup and view all the answers

<p>The tracks bend sideways and can cause derailment (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Because they expand in hot temperatures.</p> Signup and view all the answers

<p>To investigate thermal radiation practically. (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>The level of water in the capillary tube will rise.</p> Signup and view all the answers

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

<p>Metal ball and ring = Thermal expansion in solids Colored water in a flask = Thermal expansion in liquids</p> Signup and view all the answers

<p>Identifying variables. (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Recording data</p> Signup and view all the answers

<p>When an object is heated, it expands and becomes less dense, causing it to rise. (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>infrared radiation</p> Signup and view all the answers

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

<p>Black object = Good emitter and absorber Shiny object = Poor emitter and absorber</p> Signup and view all the answers

<p>Object's mass (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>To help them cool down.</p> Signup and view all the answers

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

<p>It happens only from the surface of a liquid. (C)</p> Signup and view all the answers

<p>Potassium permanganate (A)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>It decreases</p> Signup and view all the answers

<p>It increases the rate of evaporation.</p> Signup and view all the answers

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

<p>surface area</p> Signup and view all the answers

<p>Density = Mass per unit volume Convection = Heat transfer through fluid motion Potassium permanganate = Used to visualize convection currents Thermal radiation = Heat transfer through electromagnetic waves</p> Signup and view all the answers

<p>Evaporation occurs at any temperature and boiling occurs at a fixed point (B)</p> Signup and view all the answers

<p>Using varying sized samples of the different materials (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

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

<p>Radiation (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

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

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

<p>Conduction = Transfer of heat through direct contact. Convection = Transfer of heat through the movement of fluids (liquids or gases). Radiation = Transfer of heat through electromagnetic waves.</p> Signup and view all the answers

<p>Insulator (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

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

The increase in size of a material when heated.

Iron rims are heated to expand for fitting onto wooden wheels.

Hot water expands the metal lid, making it easier to open.

Gaps between tracks accommodate expansion in summer to prevent derailment.

A device that bends with temperature change due to different expansion rates.

Use thermal expansion of liquids to measure temperature.

Wires are left slack to allow for contraction in cold weather.

Examples include thermometers, fitting machine parts, and roadway joints.

The transfer of thermal energy through solids by direct contact.

Metals are the best thermal conductors due to free electrons.

Conduction occurs through atomic vibrations and free electron collisions.

The primary heat transfer method in liquids and gases; does not occur in solids.

The movement of fluid caused by changes in temperature and density.

Heating causes fluids to expand, making them less dense.

When a liquid or gas cools, it contracts and becomes denser, sinking.

The state when thermal energy is evenly distributed throughout a substance.

In convection, warmer particles move up while cooler ones sink.

Using potassium permanganate to visualize convection in water.

Transfer of heat through electromagnetic waves without needing a medium.

Different surfaces absorb heat at varying rates depending on color.

An experiment where only one variable is changed to ensure a valid comparison.

The practice of documenting observations and measurements during an experiment.

An experiment where only one variable is changed at a time.

Using charts or graphs to visually display experimental results.

A demonstration of thermal expansion in solids using a heated ball and ring.

The increase in volume of a liquid when heated.

A method to measure liquid expansion using a capillary tube and heated water.

The increase in volume of a gas when heated.

Transfer of thermal energy through electromagnetic waves.

Process by which thermal energy moves from the Sun to another object.

Process by which thermal energy moves through the pipe to the water inside.

Device used to measure the thermal energy of substances.

Equipment designed to capture and convert solar energy into heat.

How cold water gets heated as it flows from the upper to the lower tank.

Infrared radiation emitted by all objects, increases with temperature.

A material that takes in thermal radiation efficiently.

A material that releases thermal radiation effectively.

A material that bounces back thermal radiation rather than absorbing it.

Affects the amount of thermal radiation emitted; black surfaces emit more.

Rough surfaces emit more thermal radiation than smooth surfaces.

Larger surface areas lead to more radiation emission.

Change of state from liquid to gas, occurs at any temperature from the surface.

Change from liquid to gas occurring at a specific temperature throughout the liquid.

The range of energies in a liquid affects evaporation; high energy allows escaping.

Evaporation lowers the average energy and thus temperature of a liquid.

Temperature, surface area, and air movement affect how fast evaporation happens.

Increased air movement enhances the rate of evaporation by removing water vapor.

Forces between molecules that must be overcome for evaporation to occur.