Size of shadows at different times of the day
How shadows change
Throughout the day, I took a series of photos of a 1-meter stick and its shadow. The images were analyzed by the students, and the results were reported in the table below. What pattern(s) do the given data show about the duration of the shadow?
Reason for this: Data tables are a perfect way to organize and interpret data from an experiment or investigation. A series of time-lapsed photographs were taken from 6:00 a.m. to 8:00 p.m. for this investigation, and students measured the length of the shadow cast by a 1-meter long stick as well as the angle of the shadow. When the data was examined, a trend about the duration of the shadow emerged. The length of the shadow shrank during the day, reaching its shortest length at the Sun’s apogee. After this peak, the length of the shadows grew longer. The measurements in the “time” column are rising until the Sun reaches its height during the 1:00 pm hour. The length of the shadow starts to rise until the Sun is no longer at its highest point. Throughout the day, the position of the shadows also decreased. When data is analyzed, trends can also be found, and assumptions about future measurements can be made.
The sun and shadows: using shadow to estimate time of the day
On the lane, the sun shines directly into your face through your windshield. Why does it seem that the sun never quite leaves that spot before it sets in the winter? Because of winter, or more specifically, the Earth’s location in relation to the sun shifting as we all go through the seasons.
The tilt of our rotation takes the northern and southern poles together and further from the sun as the Planet rotates on its axis. Every hemisphere receives more intense sunlight due to their closer proximity, resulting in warmer days and longer periods of daylight. Even the night sky is affected by our relationship with the sun, as sunsets expose constellations at various times during the year. Since the sun and stars travel at different speeds, constellations visible near the sun just before sunrise or just after sunset reveal its location in the sky.
Another way to think about time is that the sun gets closer to the zenith, or directly overhead position, while the Earth rotates towards it. Try looking down instead of up to see what’s going on.
Following the sun: crash course kids #8.2
When was the last time you really looked at the shadows in your environment? The majority of people are unconcerned about shadows and how they change. That’s because most people don’t consider shadows to be especially important. The fact that the Earth revolves like a top and orbits around the sun is evidenced by the movement of shadows in sunlight, something that took thousands of years for people to realize.
Every morning, the World spins or rotates to face the sun on the side you are on. The sun rises over the eastern horizon as the Earth revolves. The sun appears to shift through the sky as the Earth continues to rotate as your day progresses. The sun disappears below the western horizon as the Earth rotates so that the side you are on faces away from the sun. The sun appears to move from where you are on the Earth’s surface, but it is actually our own planet’s movement that causes the sun to move and the shadows to alter.
Shadows change shape and shrink and expand during the day. Around noon, you could find that your sketches aren’t working so well. When the sun is high in the sky at noon, shadows appear as dark puddles around the bottoms of objects. Shadows change size and shape much quicker than you would expect early in the morning and late in the day. When the sun is lower in the sky in the morning and afternoon, things cast much longer shadows.
Sunshine and shadows – activity 9: shadows long and short
This series of videos guides students through exercises to address the question, “Why is my shadow shorter at times and longer at others?” The materials are listed in the introductory video. Students share their initial thoughts on the issue in the first video aimed at them. Students create and record shadow observations in subsequent images, build and use a model to figure out the Sun’s apparent regular pattern of motion in the sky, and measure the accuracy of their model by looking at photos of the Sun. Students explain why their shadow is shorter at times and longer at other times at the end.
The students go over what they saw in the 360-degree images. Students are asked to explain why Miss Sarah’s shadow was shorter at lunchtime and longer the next morning using the model they generated and the data they obtained.