Identify indicators of a chemical reaction. Check all of the boxes that apply.
Two solids are combined. After a small amount of
heat is applied, an explosion occurs and smoke is
released.
emission of heat
emission of light
formation of precipitate
formation of gas

PLZ HELP

emission of heat

emission of light

formation of gas

Explanation:

jus did it

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.