side of the chair facing the fireplace gets warm because it
3. a certain type of decorative lamp contains colored liquids. these liquids form globs that break off and rise to the top of the liquid. the globs rise due to ________.
4. near the ceiling of a room the air is warmer. the warm air rises because of ________.
5. a college student holds the back of his hand near an iron to see if it is hot. heat is transferred to his hand by ________.
6. a heater is placed under one corner of a water bed mattress. warm water moves throughout the mattress because of ________.
7. a certain type of stainless steel cookware has a layer of copper applied to the bottom to help it heat evenly. the copper transfers heat to the pan by ________.
8. in a swimming pool, the water near the surface is slightly warmer. the warm water rises because of ________.
9. one end of a copper rod is placed in a flame of a bunsen burner. small pieces of wax placed along the rod melt at progressively larger distance from the flame. heat is transferred through the rod by ________.
10. a house burns down. on the house across the street, all of the vinyl siding is twisted and warped by the heat. the heat was transferred across the street by ________.
11. warm air over the beach rises while cooler dense air from the ocean rushes in due to ________.
12. the metal skewer gets so hot that you drop your marshmallow in the campfire because of ________.
13. a huge rock at the state park gets so hot during the day that you can’t sit on it from ________.
14. you lay on that same rock at night so that you can keep warm by ________.

Question

Accepted Answer

### Question 3
# Brief Explanations:
When the liquid in the lamp forms globes, the globes are less dense than the surrounding liquid (because they are warmer, as they form from the liquid heating up). Objects less dense than the fluid they are in will float (rise) due to buoyancy, which is related to convection as the warmer, less dense fluid rises. The process here is convection (or buoyancy due to density difference from heating, leading to convection - the movement of fluid due to temperature - related density changes).
# Answer:
convection (or buoyancy due to lower density from heating)

### Question 4
# Brief Explanations:
Warm air is less dense than cool air. In a room, the warm air near the ceiling is less dense, so it rises (and cooler, denser air sinks). This movement of air due to density differences caused by temperature is convection.
# Answer:
convection (due to lower density of warm air)

### Question 5
# Brief Explanations:
When the student holds his hand near the iron, heat is transferred from the iron to his hand without direct contact, through electromagnetic waves (infrared radiation). This is radiation, as heat is transferred via radiation when there is no medium (or through air, but radiation is the primary method here for non - contact heat transfer).
# Answer:
radiation

### Question 6
# Brief Explanations:
The heater warms the water at one corner. The warm water becomes less dense and rises, and cooler water sinks to be heated. This circular movement of water (a fluid) due to temperature - induced density changes is convection. So the warm water moves throughout the mattress because of convection.
# Answer:
convection

### Question 7
# Brief Explanations:
Copper is a good conductor of heat. The heat from the stove is transferred through the copper layer to the pan by direct contact, where heat moves through the solid material (copper) from the hotter part (bottom, near the heat source) to the cooler part (the pan). This is conduction.
# Answer:
conduction

### Question 8
# Brief Explanations:
In the swimming pool, the water near the surface is warmer. Warm water is less dense than cooler water below. Due to this density difference, the less dense warm water rises. This movement of water due to temperature - related density changes is convection.
# Answer:
convection (due to lower density of warm water)

### Question 9
# Brief Explanations:
The copper rod is a solid. When one end is in the flame, heat is transferred through the rod from the hot end (near the flame) to the cooler parts (where the wax is) by the vibration of atoms and free electrons. This is conduction, as heat is transferred through a solid without bulk movement of the material.
# Answer:
conduction

### Question 10
# Brief Explanations:
The heat from the burning house is transferred to the house across the street without direct contact, through electromagnetic waves (infrared radiation). The heat travels through the air (and space) as radiation to warm the vinyl siding, causing it to warp.
# Answer:
radiation

### Question 11
# Brief Explanations:
Warm air over the beach is less dense than the cooler, denser air from the ocean. The less dense warm air rises, and the denser cool air from the ocean rushes in to replace it. This movement of air due to density differences caused by temperature is convection.
# Answer:
convection (density differences from temperature)

### Question 12
# Brief Explanations:
The metal skewer is a solid. When it is in the campfire, heat is transferred from the hot part (in the fire) to the part holding the marshmallow through the metal by conduction (vibration of atoms and free electrons transferring heat through the solid).
# Answer:
conduction

### Question 13
# Brief Explanations:
The rock gets hot during the day because heat from the Sun is transferred to the rock without direct contact, through electromagnetic waves (solar radiation, mainly infrared). The rock absorbs this radiation and becomes hot.
# Answer:
radiation

### Question 14
# Brief Explanations:
At night, the rock that was heated during the day emits heat as infrared radiation (or transfers heat to your body through direct contact, but since you lay on it, conduction is also a factor. However, the rock is radiating heat it stored, and also conducting heat to your body. But mainly, when you lay on it, heat is transferred from the rock to your body by conduction (direct contact) and also the rock radiates heat. But the primary method here, as you are in contact, is conduction (and also radiation from the rock's surface). But the main process for the rock warming you as you lay on it is conduction (direct contact transfer of heat from the rock to your body).
# Answer:
conduction (and radiation, but conduction is primary due to contact)

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