Why is it important to use models when explaining or teaching things?
What are some limitations of models? (What makes them imperfect?)
How did you decide on the model that you chose for this video? What made it the best model for the job? (Why didn't you choose a different model?)
It is important because sometimes it's hard to learn difficult concepts with just words. Like for seasons, if I was watching my video I might not have been able to understand it without words.
They aren't up to scale with the real thing, and you might not be able to show something totally. You can't really show how the earth goes around the sun for real, and a globe isn't even 1/4 of the size of Earth.
I chose a globe, flashlights, a styrofoam ball, and toothpicks. I chose those because I though that I could show seasons best that way. The flashlight shows the sun the best, a globe is a really small version of Earth, and toothpicks can go into the styrofoam to show places.
Living in a state of nature would be fun because, you can do fun things whenever you want! Before you are sixteen you can drive a car, and you can play games during school! (Even though in the story I didn't like it.) You can goof around and not be told to stop, well they can but you don't have to listen to them. It would also be fun because you don't have to listen to your parents. But, you might want to.
I'm gald we don't live in a state of nature because it would be hard to live a safe and happy life. People could boss you around if they were bigger and stronger than you. People would be hurt and things can be stolen from you. Your food, things in your house, and a lot of other things. It would be really hard to live in a state of nature everyday of your life.
What patterns did you notice about the shadow length throughout the day?
What caused these patterns?
When you analyzed your shadow graphs, when did the longest shadows occur? Why?
When you analyzed your shadow graphs, when did the shortest shadows occur? Why?
What was the most challenging part of this lesson?
What do you feel you learned from completing this lesson?
As the time got closer to noon the shadow's length got smaller. When it was farther away from noon the shadow's length was larger.
The sun. It does because as the sun appears to travel as an arc in the sky the shadows change. The farther the sun is to the east and west is when the shadows are long. When it is almost directly above us, the shadows are shorter.
At 9:30 and 2:15. It was those times because the sun was rising and starting to set.
The shortest shadows were at 10:30 and 12:00. It was then because the sun was almost directly above us.
The most challenging part was when we had to go outside and make sure to trace the shadow correctly.
I learned why shadows are different lengths at different times of the day, and how the sun affects that.
What shape (or pattern) did the sun appear to make in the sky over the course of the day? What evidence do you have to support your explanation?
How did the height of the sun change during the day? What evidence do you have to support your explanation?
Why was it important to use the same landmark(s) for each observation and have a permanent spot to record our observations from?
When you look at your data from the day, how did the sun’s position seem to change over time?
If you did the same activity next week, do you think you would see the same pattern of movement of the sun? Why or why not?
What about next month?
What about 6 months from now?
Based on your observations, where do you think the sun goes every evening?
The sun appeared to travel in an arc. It looked like that because it rises and sets in opposite directions. Also at about 10:30 it was more in the east and at about 12:45 it was higher up in the sky.
It kept going up until about 12:00 pm. Then after it was going down lower. In our picture the sun was in the east in the morning and then in the afternoon it was headed west.
It is important because you are facing the same way you were when you fist saw the sun. Then, you can definitely see the arc pattern and where it came from and where it's going.
It traveled in an arc. It kept getting higher until about noon, and then at about 12:30 it started going westward.
No. You wouldn't because the earth is always moving around the sun. So, the distance might be different, and because the earth's axis always faces the same way the earth might be facing a different way.
No. Next month it will be getting closer to spring equinox which is when the sun will shine pretty evenly on the earth. The earth keeps revolving around the sun.
No. In six months it will be Summer and the sun will be going much higher in the sky.
The other side of the earth. When we have daylight that means the other side of the earth has no light. So, when we have no light they have light.
Write a one (or more) paragraph explanation of the challenge.
Write a one (or more) paragraph explanation of the problem your chose to address.
Write a one (or more) paragraph explanation of the solution you can up with.
Embed your video at the top of the post.
Then, answer the following Reflection/Synthesis Questions
The challenge was about solving an environmental problem. Like littering or air pollution. Stuff like that. We had to come up with a problem and then research it. Then, you think of a solution and draw it. You can draw it however you want. Then you start building your prototype. After, you are done you make a video about it. Finally, if you want to enter the contest you can sign up.
The problem I chose was littering. I chose it because it is a big problem that is happening everywhere. I started thinking about what I can do in my community. Then I thought about littering and I thought that it was a good topic.
The solution I came up with was a portable vacuum that is powered by solar energy. I researched that one cause of littering was laziness. So, I decided to make a portable vacuum because you can do it while you are doing something else. Then I decided to use solar power because that is better for the environment too.
What was difficult about this challenge?
What did you learn while completing this challenge?
What advice can you give others about becoming better at time management?
Something that was difficult about this challenge was finding supplies that can work for your prototype.
I learned about different problems in the environment. Like, how bad air and water pollution has gotten.
Take a look ahead to see if their is anything you can get ready. Like for this challenge we had to make a blog post and I created it ahead of time. Then it was easier because when I finished my video I could just start answering the questions.
How are shadows made outside in the daytime? Provide some evidence to support your answer.
Can shadows be made inside the classroom? If so, how?
Do outside shadows change during the day? If so, how? Refer to the pole or stick the class observed outside if needed.
Think about the time between observations of the pole’s shadow. What happened?
What does this (the answer to #4) tell you about the sun’s position in the sky?
Insert one or two photos (from mine above) into your blog post to help you explain how the sun's position appears to follow an arc throughout the day.
Shadows are made in the daytime by the sun's light. Shadows are made because you are blocking the sun's light. Then, the spot on the ground that is not being lit up is your shadow.
Yes. It is yes because there is light in the classroom, and you are blocking it. Even if you aren't outside if there is light your body will block it to cause a shadow.
Shadows do change throughout the day. They change the direction they are facing. The sun throughout the day moves on an arc. When the sun goes farther up or down the arc the length and the way the shadow is facing changes.
The shadow got smaller before 12:00 pm but, it got a lot bigger after about 1:00 pm. The shadow also changed directions when the sun started going west.
It tells me that it goes up high and low. It tells me that because the higher up the sun got the shorter the shadow got. Also, when it got lower the shadow kept getting longer.
What affect will the height of the meteor have on the craters that form?
Which of the following best describes Earth’s shape? A. disk B. circle C. sphere D. plane
Earth’s gravity pulls an object toward its ____________________.
Which model do you find most useful to explain gravity and its effects? Why? - Tennis ball and rubber band? - Styrofoam ball and toothpicks? - Circle on paper with arrows?
Why are models helpful at explaining complex scientific concepts like gravity?
Do you think the moon is affected by Earth’s gravity? If so, why doesn’t it fall “down” toward the Earth?
Why doesn’t a plane or bird fall from the sky?
Does gravity ever stop working? Do any forces ever cancel out gravity or reverse it? Explain.
Why is this lesson on gravity a good time to teach about craters?
I hypothisize that it will be deeper the higher the object is.
Sphere. It is a shpere because it is a three-dimentional circular object.
Earth's gravity pulls an object towards its center.
Tennis ball and rubber band. I think it is the most effective because it shows how the objects come back to Earth.
Models are helpful because they show you an idea of things like gravity, without having to go into space and throwing a ball up at the sky. Instead you can use something like the tennis ball and rubber band.
I am pretty sure that it is. I don't think that it falls down because the moon has a small amount of gravity too.
A bird or plane doesn't fall from the sky because, the bird and plane are pushing down on the earth and the earth is pushing up on it.
Gravity never stops working. It never stops because when you are asleep at night you don't just go floating out into space, or when you are at school you don't go out floating into space either. Centripetal force is a force that can't totally cancel out gravity but makes it weaker.
This is a good time to learn about craters because gravity is pushing the object down to make the crater. Also, the objects are picked up by gravity to be able to crash into the moon are planet they crashed into.