Describe how a chronological record of Earth’s atmosphere for the past 420 000 years can be constructed from ice-core samples.

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.

Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.

The ph is the a. independent variable b. the dependent variable c. control group