Misc. (2) Misc. (1) Heat Energy (2) Heat Energy (1) States of Matter

States of Matter – 10 Points Molecules of a substance begin to do this as temperature increases. Move faster, spread further apart.

States of Matter – 20 Points Describe the behavior of the molecules of a solid, liquid, and gas. You may use the ‘hand motion’ trick to help in your explanation. Solid – tightly packed, vibrate against each other Liquid – loosely packed, able to slide past each other Gas – zooming past each other!

States of Matter – 30 Points This state of matter has a definite volume, but its shape can change depending on the size/shape of its container. Liquid

States of Matter – 40 Points Solid ice _____ into liquid water. This phase change is _______ thermal energy. Melts; adding

States of Matter – 50 pts What is the boiling point of water? 100 degrees Celsius Boiling is when a ______ turns into a ______ because heat energy is being ______. This also happens during ______, but it takes longer to happen. Liquid; gas; added; evaporation

Heat Energy (1) – 10 points This is when heat energy is transferred through direct contact. conduction

Thermal Energy (1) – 20 Points The rubber coating on copper phone lines make great ________ because they slow the transfer of thermal energy. insulators

Heat Energy (1) – 30 Points You want to keep your cup of coffee hot for as long as possible. What could you do to the cup to keep it hot? Explain why this would work. Insulate the cup to slow the transfer of thermal energy

Thermal Energy (1) – 50 pts Which of the following has NO thermal energy: A metal spoon that feels cold. OR A metal spoon that feels hot. And explain HOW you know. Neither, everything has thermal energy unless the molecules STOP moving (absolute zero).

Thermal Energy (1) – 40 pts Tyrone grabs a door knob, that has been in a room that is 70 degrees, and he screams “Wow, it feels so cold!” Why does the door knob feel cold? Explain what is happening to the thermal energy when he grabs the door knob. Thermal energy is transferring from Tyrone’s hand to the knob because thermal energy always moves from hotter matter to colder matter. It feels cold because the knob is rapidly stealing thermal energy from Tyrone’s hand (because it is a conductor), making it feel cold to him as his hand loses heat.

Thermal Energy (2) – 10 pts Thermal energy always moves from _______ matter to _______ matter. Hotter; Colder

Thermal Energy (2) – 20 pts Thermal energy that is transferred to you from the sun is done through this process. radiation

Thermal Energy (2) – 30 pts What process is taking place below? Describe what is happening. Convection – Air molecules near the heat source become heated and then begin to rise because they are know less dense than cooler air molecules. The cooler air molecules are pushed downward, near the heat source, become heated, and then rise to continue the cycle until reaching equilibrium.

Thermal Energy (2) – 40 pts You accidentally drop your lacrosse ball, which had a temperature of 70 degrees, into a bucket of cold water (40 degrees). How will heat energy be transferred in this situation? What will final temperature of the bucket of water be when heat stops being transferred? Heat energy will transfer from the ball to the water because the ball is at a higher temperature. Thermal energy will stop being transferred when equlibrium is reached at approximately 55 degrees.

Thermal Energy (2) – 50 pts Would you feel warmer at point A or point B? Explain WHY using your knowledge of thermal energy that comes from the sun. You would feel warmer at point B because you are in direct sunlight. There is nothing to block the radiation from the sun from reaching you.

Misc. (1) – 10 pts TRUE OR FALSE. The sun heats objects through electromagnetic waves. TRUE OR FALSE Heat energy from the sun needs a medium, like air, in order to be transferred to objects on Earth.

Misc. (1) – 20 points Why does a black roof get hotter than a white roof in the summer? Describe what is happening to BOTH roofs. A black colored roof absorbs all light waves from the sun and converts it into thermal energy. A white colored roof reflects all light waves from the sun.

Misc. (1) – 30 points As the temperature of a substance increases, its thermal energy ________. Increases Explanation: If temperature is increasing, thermal energy must also increase, causing molecules to move faster and spread further apart.

Misc. (1) – 40 points Video daily double. Describe why the food coloring spread out quicker in one glass compared to the other. You MUST use the words “molecules” and “thermal energy” in your answers. One glass has water at a higher temperature. The water at a higher temperature has more thermal energy than the one with cooler water. Therefore, the molecules (represented by the food coloring) move faster and spread further apart than the cooler glass of water.

Misc. (1) – 50 Points Label all the arrows.

Misc. (2) – 10 Points The molecules of a substance move ______ as they take in thermal energy. faster

Misc. (2) – 20 Points When a wave hits a medium, it can either _________, ____________, or ___________. Reflected; transmitted; absorbed

Misc. (2) – 30 points When water drops below 100 degrees Celsius, it changes from a ______ to a _______ because heat energy is being ______ in the process known as _______. Gas; liquid; removed; condensation

Misc. (2) – 40 Points This is the measure of the average kinetic energy of the molecules of a substance. Temperature Explanation: As temperature increases, molecules begin to move faster. Since kinetic energy is the energy of motion, the faster the molecules of an object move, the more kinetic energy they have.

Misc. (2) – 50 Points Give an example of EACH of the following. A light wave being reflected. Light waves reflecting off your hand and into your eyes so you can see it. A light wave being transmitted. Light waves being scattered as they pass through a prism, revealing all parts of the visible light spectrum. A light wave being absorbed. Light waves hitting a black surface and turning into HEAT.

Final Jeopardy Each team will have one minute to come up with their wager. Category for Final Jeopardy: Miscellaneous Teams can work together to answer final jeopardy question. Answer will be submitted on paper.

Final Jeopardy Question Both dogs are at the same temperature. Does one dog have more thermal energy than the other? If no, tell me why it is the same for both dogs. If yes, tell me which dog has more thermal energy AND tell me why that dog has more thermal energy than the other. It takes more thermal energy to increase the temperature of an object that has more mass. Therefore, the larger dog has more thermal energy, even though both dogs are at the same temperature.