Question: Betty was puzzled. In the morning the shadow of the bus sign is in the street. In the afternoon the shadow of the bus sign points the opposite direction. Explain to Betty why this happens.
Reference answer: In the morning the Sun is in the east so shadows point west. In the afternoon the Sun is in the west so shadows point east.

Student answer: I think that Betty was a best shadow that was facing the opposite direction.

Student answer: The reason why this happened is because the sun revolves around the earth.

Student answer: The shadow turns the opposite way in the afternoon, in the morning it is on the side of you.

Student answer: In the morning the sun faced east so the bus sign's shadow was in the west. When it was the afternoon, the sun faced west. So the shadow went the opposite of where it used to be in the morning.

Student answer: Since the earth spins, the sun twirls around us. In the morning it was hitting the bus sign in the back. Then later the shadow seems to have moved. It is because of the position of the sun.

Student answer: Because the earth run into the sun and made the bus shadow go around.

Student answer: If the sun is in the east the shadow is on the west. If the shadow is on the south then the shadow is on the north.

Student answer: The sun is in different places at different times.

Student answer: This happens because in the morning the sun rises north that is why the bus points in the street. The bus points the opposite direction, because the sun sets west.

Student answer: Because the time changes so the shadow is at the opposite.

Student answer: This happen because the sun moved over the sky.

Student answer: In the morning the sun rises from the east, and the bus blocked the light and made a shadow on the opposite direction.

Student answer: Because the sun orbits the earth and it goes from east to west and it gets shorter.

Student answer: The sun rises in the east so the shadow was on the west and the sun sets in the west so the shadow was on the east.

Student answer: Because over time the sun goes to the west moving the shadow.

Student answer: Because the sun moves. So the shadow will change where it is.

Student answer: Because the sun moves around. So it will shine the opposite direction.

Student answer: Because the sun sets in the opposite direction. So what happens is the shadow will be on the opposite side.

Student answer: The earth rotates making the sun in different spots causing the shadows to move in different spots.

Student answer: As the earth rotates the part facing the sun is turning to make the sun in a different place which causes the to rotate.

Student answer: The bus stop's shadow was facing the opposite direction because in the morning the sun rises from the east and the shadow was facing west. The sun sets in the west and so the shadow is facing east.

Student answer: Because only one side of an object can get sunlight.

Student answer: The earth orbits around the sun so the shadow will change.

Student answer: This happens because the sun rises in the east and sets in the west, therefore the sun's light is hitting the stop sign at different positions.

Student answer: Because our earth rotates.

Student answer: This happens because of the earth, it rotates around the sun which of course the shadows will move, also the sun rises in the east and sets on the west.

Student answer: Because while the earth rotates, we see the sun in different direction. The sun rises at the east and sets in the west.

Student answer: Because when the earth rotates, not the sun, the sun moves, but it really stays in one place, making the shadow move.

Student answer: This is happening because the sun rises in the east so in the morning the shadow will be in the west. The sun sets in the west so the shadows will be in the east.

Student answer: The shadow of the bus stop changes direction because the sun is moving throughout the day so the sun will meet different at the stop sign. Because it moves the earth plus the stop sign.

Student answer: It is the different time of the day.

Student answer: Well Betty the earth moves around the sun and that kind of has something to do with it like at different times shadows move to different directions.

Student answer: The bus sign faces different directions because the earth move throughout the day the sun does not move.

Student answer: It happens because the earth is rotating and it does not stay on the same place every time of day.

Student answer: That happened because the earth moves which made the sun face the other way and made the sign face the other direction.

Student answer: Because the sun rises in the east and sets on the west. So in the morning the shadows will be facing one direction and on the afternoon it will be facing the other way.