During a lab experiment, students are supposed to add small pieces of magnesium, aluminum, and calcium metal to concentrated hydrochloric acid in a test tube. the laboratory instructions include strong safety warnings to make sure that no sparks, open flames, or high heat sources are present in the room when students perform this experiment. which is the most likely reason for these warnings

Hydrogen gas is released when these 3 metals are reacted wit the acid. This gas is highly inflammable and will react violently with sparks , open flames and sources of high heat.

Hydrogen gas is highly flammable

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.