As you travel from the surface of the earth up through the atmosphere into outer space, the gases become. a) more dense. b) less dense. c)higher in temperature. d)consistently lower in temperature.

Option B, Less dense

Explanation:

As we move up, the space in which gas molecules are confined increases as compared to the space near the earth's surface. Hence as we move up, the same number of air particles and molecules occupies a larger space and hence their density reduces.

Mathematically,

The higher the volume (V) will be the lower will the density (D), given mass (M) is constant.

Hence, option B is correct.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.