Whats the name of the super continent that split up 225 million years ago

Identify the type of synthetic material used in each object

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.