A sundial is made of two parts: a flat plate and a stick (gnomon). The dial is placed outside. The gnomon moves and tells time. Which phrase best explains how a sundial works?
The pull of the Sun's gravity turns the dial.
The Earth's gravity pulls the gnomon around the dial.
As the Sun moves in the sky, the gnomon's shadow moves.
The dial must be turned by hand during each position of the Sun.
What would be a likely long-term consequence of severe solar flares?
Consistent disruptions of radio waves and navigation devices.
Severe storms would happen more frequently.
The Earth's temperature would increase further.
They would shut down communication systems.
Katherine visits Australia in July. She remembers it is winter in Australia. What is the most likely position of the Earth and Sun during her visit
The planet Saturn has large rings composed of ice, water, and rocky material. Which phrase best explains the role of gravity in Saturn's rings? Select all that apply.
Gravity keeps the rings from colliding with Saturn.
The gravitational pull captures debris for the rings.
The gravity from other planets is too weak to pull at the rings.
Gravitational pull from the Sun prevents other planets from colliding with the rings.
There is a lunar eclipse happening over North America. How is this likely to affect the ocean tides?