Learning Goal #2 Test Review! Created by Educational Technology Network. www.edtechnetwork.com 2009

10 20 30 40 50 Topic 2 Situations Topic 4 Conduction, Convection and Radiation Topic 2 Situations Topic 3 Thermal Energy Random Topic 4 The Law of Conservation of energy Topic 5 Picture This/ Name That 10 20 30 40 50

Give an example of something heating by radiation Topic 1 - 10 Give an example of something heating by radiation

Heating from a light, the sun, or a fire Answer 1 – 10 Heating from a light, the sun, or a fire

Topic 1 - 20 Give an example of something heating by conduction

Answer 1 – 20 A pan getting hot from a stovetop, the can getting hot from the heating pad, cheese melting on a burger, etc.

Topic 1 - 30 How is heat transferred through conduction?

Answer 1 – 30 Through directs contact (solids)

Topic 1 - 40 How is heat transferred through radiation?

Answer 1 – 40 Through waves (empty space)

Topic 1 - 50 Give an example of heat being transferred through convection.

Answer 1 – 50 A heater heats a room, boiling water in a pot, etc.

Topic 2 - 10 A falling watermelon has kinetic energy. Where does that energy go when it hits the ground and stops? a: It disappears b: It is transformed into potential energy again c: It is transformed into heat d: It is transformed into matter

Answer 2 – 10 C- The watermelon energy is transformed into heat

Topic 2 - 20 What evidence demonstrates that convection currents are at work? A: food coloring spreads through a glass of water being stirred B: Smoke rises from a lighted candle wick C: The handle of a pan on the stove gets hot D: Your face feels warm sitting beside a fire

Answer 2 – 20 B: Smoke rises from a lighted candle wick

Topic 2 - 30 A person holds a nail in the flame of a candle and eventually drops the nail because it has gotten too hot to hold. Explain the heat transfer that took place and how you know.

Answer 2 – 30 Conduction- Direct contact, the molecules in a solid vibrate all the way down the object until the whole thing is hot. Metal is also a good conductor of heat.

Topic 2 - 40 What does an insulator do?

Answer 2 – 40 Minimizes the flow of thermal energy/ Stops or slows thermal energy from moving

Give an example of a poor insulator Topic 2 - 50 Give an example of a poor insulator

Metal, other conductors Answer 2 – 50 Metal, other conductors

Name 3 materials that are good insulators Topic 3 – 10 Name 3 materials that are good insulators

Answer 3 – 10 Cotton Styrofoam Paper Wool Rubber Wood Silica gel Fiberglass

Topic 3 - 20 A winter coat is an example of _______. A: a conductor B: an insulator C: a generator D: a refractor

Answer 3 – 20 B: an insulator

Topic 3 - 30 Which of the materials below is the best conductor of heat? A: air B: plastic C: copper D: wood

Answer 3 – 30 C: copper

Topic 3 - 40 Heat always travels _______. A: from low to high places B: from high to low places C: from warm to cool places D: from cool to warm places

Answer 3 – 40 C: from warm to cool places

Topic 3 - 50 Stepping from a carpet onto a tile floor, your bare feet suddenly feel cold because ___________. A: the tile is colder than the carpet B: the tile is a better conductor than the carpet C: the carpet is a better conductor than the tile D: the carpet radiates more heat than the tile

Answer 3 – 50 B: the tile is a better conductor than the carpet

Topic 4 - 10 The law of conservation of energy: What is it? (Think about the money transfer we did in class)

Answer 4 – 10 Energy cannot be created or destroyed, but it can be transferred and change forms.

Topic 4 - 20 List 5 Forms of energy (Think about your graphic organizer)

Answer 4 – 20 Heat Chemical Mechanical Nuclear Light Sound GPE EPE

Topic 4 - 30 A battery has what kind of energy?

Answer 4 – 30 Chemical Energy

Topic 4 - 40 What type of energy does friction produce?

Answer 4 – 40 Heat (Remember rubbing your hands together)

Topic 4 - 50 What form of energy is given when you kick a football?

Answer 4 – 50 Mechanical Energy (motion energy)

Topic 5 - 10 Name That Energy Transfer (2 steps) Start: Food End: Your muscles allow you to run (Be specific)

Answer 5 – 10 Start: Food= Chemical Energy End: Muscles= Mechanical Energy

Topic 5 - 20 What heat transfer is happening at each object?

Answer 5 – 20 Campfire- Radiation Pot- Convection Frying Pan- Conduction

Topic 5 - 30 Name That Energy Transfer (At least 3 steps) Skier (name as many transfers as possible) Start: Top of a mountain End: Stopped at the bottom of the mountain (Be specific)

Answer 5 – 30 Start: Potential energy at the top During: Kinetic energy as the skier goes down During: Chemical energy from food to mechanical as muscles move. End: Kinetic/ mechanical is changed into thermal/heat once the skier has stopped at the bottom.

Topic 5 - 40 Your hot chocolate was too hot so you let it sit on the table for 3o minutes. When you came back it was much cooler. What happened to the heat?

Answer 5 – 40 Heat moves from warmer things to cooler things so the heat moved from the hot chocolate by convection in steam up into the air and also by conduction from the cup to the table.

Topic 5 - 50 Name the energy transfers taking place in these items Start: Battery- End: Flashlight Start: Taco- End: Playing Soccer Start: Charger- End: Charging phone

Answer 5 – 50 Battery – Flashlight Taco- Playing Soccer Chemical- Light/Heat Taco- Playing Soccer Chemical- Mechanical Charger- Charging phone Electrical- light/heat