This layer extends to a height of 8 km at the poles and 18 km at the equator. Tropopause - This is a boundary that separates the first two layers. This layer extends to a height of 50 km. Mesophere - This layer extends from 50 to 85 km above the Earth's surface. Thermosphere - This layer extends from 85 km above the earth's surface upward into space.
Half fill the fish bowl with water.
Crumble a paper towel and place it in the glass jar so that it will not fall out when the jar in inverted. Make an educated guess about what will happen when the inverted jar is submerged. Record your guess. Keeping the inverted jar vertical, push it to the bottom of the bowl. Record your observations in your table.