Heating of Land And Water

Question 1

Materials needed

Answer 1

• 2 large plastic containers of the same size and shape
• 2 thermometers
  -2 iron or wood stands
  -2 iron clamps
  -Water
  -Sand

Question 2

The bulbs of the thermometers should be about _ cm below the surface

Answer 2

2 cm

Question 3

Place the setups under the sun and to the shade every _ minutes for the next __ minutes

Answer 3

5 minutes
25 minutes

Question 4

Sand generally has a higher temperature than water when exposed to sunlight due to differences in their __ __ and __ __ __

Answer 4

thermal properties and heat absorption mechanisms.

Question 5

Water has a much higher _ _ than sand, meaning it can absorb and store more heat energy per unit mass.

Answer 5

heat capacity

Question 6

This property (high heat capacity ) allows water to _ _ more slowly and _ _ more slowly compared to sand.

Answer 6

Heat up
Cool down

Question 7

sand has a lower _ _ so it heats up and cools down relatively quickly.

Answer 7

heat capacity

Question 8

Heat Capacity:
Water And Sand

Answer 8

Water - Water has a much higher heat capacity than sand, meaning it can absorb and store more heat energy per unit mass. This property allows water to heat up more slowly and cool down more slowly compared to sand.

Sand - has a lower heat capacity, so it heats up and cools down relatively quickly.

Question 9

Thermal Conductivity:
Water And Sand

Answer 9

Sand - is a good conductor of heat, which means it can transfer heat energy more effectively. When the sun’s energy is absorbed by sand, it quickly spreads throughout the material, raising its temperature.

Water - is a poor conductor of heat, so it retains heat at the surface rather than transferring it efficiently to the deeper layers.

Question 10

Albedo - measures how much solar radiation is reflected by a surface.
WATER AND SAND

Answer 10

Water- has a lower albedo than sand, which means it absorbs more of the incoming solar radiation and converts it into heat.

Sand- reflects more of the sunlight, leading to less direct absorption of heat.

Question 11

Specific Heat:
Water and Sand

Answer 11

Water- has a high specific heat, which means it can absorb a lot of energy without a significant increase in temperature. This is why bodies of water, like oceans, tend to have more stable and moderate temperatures.

Sand- with its lower specific heat, heats up more quickly under the same amount of sunlight.

Question 12

How does the color of the container have an influence on the temperature of heated samples?

Answer 12

Dark-colored containers tend to absorb more heat from the sun, while light-colored containers reflect more heat.

Question 13

Dark-colored containers tend to __ __ more efficiently, which can lead to slightly __ cooling when placed in a cooler environment.

Answer 13

radiate heat
faster

Question 14

Why does the temperature of samples decrease in the shade?

Answer 14

Because it receive less exposure to sunlight means less heat energy is being absorbed by the sand or water.

Question 15

Date performed:
Date submitted:

Answer 15

September 25, 2023
September 28, 2023

Question 16

Why the bulb of thermometer should be 2 cm below the surface?

Answer 16

To measure the temperature of the substance closest to the surface. This is often the region where the temperature is most representative of the overall temperature of the substance.