The sun and stars change positions because Earth moves
yes
All three in a straight line, with the Moon between the Earth and the Sun.
Sun/Moon/Earth = Solar eclipse Sun/Earth/Moon = Lunar eclipse
All three in a straight line, with the Moon between the Earth and the Sun.
The Southern Hemisphere is tilted toward the sun.
Shadows are all about the Earth's rotation. As the Earth rotates throughout the day, the relative positions of the sun and Earth change. The sun is the primary light source for shadows, and if the light source is changing positions (this is relative to earth), then the shadows will change.
During the solar eclipse the Moon passes between the Sun and Earth, and the Moon fully or partially blocks the Sun.
Because of the relative positions of the earth, sun and moon.
At a right angle.
The rotation of the Earth on its axis.
The sun appears to move across the sky throughout the day due to the Earth's rotation. It rises in the east, reaches its highest point at noon, and sets in the west. This apparent motion is actually caused by the Earth spinning on its axis.