Answer:
The weight of each filled balloon
Explanation:
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<span>ecosystems
</span>An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. More importantly, the living things are very dependent on the abiotic community since it cannot survive by itself. Every animal, plant and human needs the primary physiological needs of water, food and shelter provided by the abiotic system. <span> </span>
In 1-rescuer basic life support
(BLS) for a child with unwitnessed cardiac arrest, the rescuer should leave the
victim to activate the emergency response system (and retrieve an Automated
external defibrillator [AED]) after providing 2 minutes of cardiopulmonary resuscitation
(CPR). The compression-to-ventilation ratio is 30:2.