Thermal Energy Day 1 Materials Needed: Writing Utensil Writing Utensil Notebook Notebook Folder Folder

What is kinetic energy? What is the kinetic energy of an object at absolute zero? Agenda Notes and Practice over thermal energy & process of energy transfer.

Q1: W AVES WILL TRAVEL THE FASTEST IN WHICH MATERIAL ? SC8.2.3.b DOK 1 A. solids are fastest B. gases are fastest C. liquids are the fastest D. all materials are the same

Q2: L IGHT FROM AN EXPLODING FIREWORK IS SEEN AND A MOMENT LATER ITS SOUND IS HEARD. W HICH OF THESE EXPLAINS WHY THE SOUND AND LIGHT DO NOT OCCUR AT THE SAME TIME ? A. Sound travels slower than light. B. Sound travels through a vacuum. C. C. Light travels slower than sound. D. D. Light and sound travel at the same speed. SC8.2.3.b DOK 1

M ATH B OOSTER D AY 1 A couple spent ¼ of their money on a laptop.They bought a bike for $130 and spent half of what they paid for the laptop, on groceries. If they started with $600, how much was left after their shopping spree?

G REEK & L ATIN Greek /LatinMeaning flex-bend tetra-four calor-heat bi-two phon-sound

What is kinetic energy? The energy an object has due to its motion What is the kinetic energy of an object at absolute zero? there is no motion, so there is no kinetic energy

A1: W AVES WILL TRAVEL THE FASTEST IN WHICH MATERIAL ? SC8.2.3.b DOK 1 A. solids are fastest Waves travel fastest through solids B. gases are fastest Waves travel slowest through gases. C. liquids are the fastest Waves travel faster through liquids than gases and slower than solids. D. all materials are the same Waves traveling though a material are affected by the material, so they cannot all be the same.

A2: L IGHT FROM AN EXPLODING FIREWORK IS SEEN AND A MOMENT LATER ITS SOUND IS HEARD. W HICH OF THESE EXPLAINS WHY THE SOUND AND LIGHT DO NOT OCCUR AT THE SAME TIME ? A. Sound travels slower than light. Sound waves travel slower than light waves. B. Sound travels through a vacuum. Sound waves do not travel in a vacuum. C. Light travels slower than sound. Sound waves travel slower than light waves. D. Light and sound travel at the same speed. Sound waves travel slower than light waves. SC8.2.3.b DOK 1

M ATH B OOSTER D AY 1 ¼ of their money = laptop, a bike = $130, half of what they paid for the laptop = groceries, started with $560 how much was left? Money spent on laptop = ¼ of $600 = ¼ × 600 = $150 Money spent on the bike = $130 Money spent on groceries = ½ × 150 = $75 Total Money Spent = $150 + $130 + $75 = $355 Money left after shopping = $600 – $355 = $245

I will know the difference between temperature and heat. I will know that thermal energy depends on different variables. I will be able to graph temperature and interpret temperature differences in different materials.

Temperature is a measure of how hot or cold an object is compared to a reference point. On the Celsius scale, the reference points are the freezing and boiling points of water. Absolute zero is defined as a temperature of 0 Kelvin.

Heat is the transfer of thermal energy from one object to another because of a temperature difference. In what direction does heat flow spontaneously? From hot objects to cold objects!

As an object heats up, its particles move faster. This increases the average kinetic energy of the particles. One way that heat flows is by the transfer of energy in collisions. On average, high-energy particles lose energy.Low-energy particles gain energy.

What is the relationship between temperature and energy? Temperature – Turn to a partner Answer: Temperature is related to the average kinetic energy of the particles in an object, due to their random motions through space.

Thermal energy is the total potential energy and kinetic energy of all the particles in an object. Thermal energy depends on the mass, temperature, and phase (solid, liquid, or gas) of an object.

Thermal energy depends on mass. The more mass the more thermal energy. A cup of tea and a teapot full of tea can have the same temperature ( the average kinetic energy of the particles is the same).However, there is more thermal energy in the teapot because it contains more particles.

Thermal energy depends on temperature. The higher the temperature the more thermal energy. In a cup of hot tea and a cup of cold tea, the tea has the same mass and number of particles.The average kinetic energy of particles is higher in the hot tea, so the hot tea has greater thermal energy.

Thermal energy depends on phase. Gases have more thermal energy than liquids, which typically have more thermal energy than solids. An ice cube and cup of water have the same number of particles. The average kinetic energy of particles is higher in the water, so the water has greater thermal energy.

A. The tea is at a higher temperature, because its particles have a higher average kinetic energy. B. The lemonade has more thermal energy because it has many more particles. In which liquid are the water particles moving faster? Thermal Energy – Class Discussion

Thermal expansion is an increase in the volume of a material due to an increase in temperature. Thermal contraction is a decrease in the volume of material due to a decrease in temperature. Why does the volume change? the change occurs when particles of matter move farther or closer as temperature increases.

As temperature decreases, the particles that make up the air inside the balloon move more slowly. Slower particles collide less often and exert less force. Gas pressure decreases and the balloon contracts. Thermal Energy – Turn to a partner What happens when a balloon goes from being in a warm house to the cold outdoors?

Group Practice Work in your small group to complete the worksheet. Step 1: Create the graph Step 2: Answer the questions based on the graph Step 3: Answer the conceptual questions.

Assessment Questions 1. What is the thermal energy of an object? a. the total number of atoms or molecules b. the total kinetic energy of the atoms or molecules c. the average kinetic energy of the atoms or molecules d. the average mechanical energy of the atoms or molecules

Assessment Questions 1. What is the thermal energy of an object? a. the total number of atoms or molecules b. the total kinetic energy of the atoms or molecules c. the average kinetic energy of the atoms or molecules d. the average mechanical energy of the atoms or molecules ANS:B

Assessment Questions 2. What causes a gas to expand when its temperature is increased? a. The number of particles increases as temperature increases. b. Each particle expands as its temperature increases, so the total volume increases. c. As temperature increases, more electrons leave atoms and move separately. d. As gas particles move faster, they overcome some forces of attraction.

Assessment Questions 2. What causes a gas to expand when its temperature is increased? a. The number of particles increases as temperature increases. b. Each particle expands as its temperature increases, so the total volume increases. c. As temperature increases, more electrons leave atoms and move separately. d. As gas particles move faster, they overcome some forces of attraction. ANS:D

Assessment Questions 1. Temperature is the transfer of thermal energy from one object to another. True False

Assessment Questions 1. Temperature is the transfer of thermal energy from one object to another. True False ANS:F, Heat is the transfer of thermal energy from one object to another.

1. What variables affect the thermal energy of an object? 2. How are temperature and energy related? 3. What causes thermal expansion?

Use Physical Science Text Book Read Page # Summarize all text and each picture/diagram.

Are particles located closer together in a solid or a liquid? Would you be warmer sitting next to a window with the sun coming in or next to the wall? Agenda Notes over processes of thermal energy transfer.