input question: What is the missing first step of the following process:  -  The sound waves hit an object - Echoes are produced - The echo returns to the bat&#x27;s ears - The bat hears the echo - The bat can figure out where the object is located.???
output answer: The bat sends out sound waves from their mouth or nose

input question: What is the missing first step of the following process:  -  They sit still on a perch, like a stump of branch, and wait for prey - They use their highly sensitive hearing to locate prey that cannot be seen - They use their very keen vision to see prey in the dark - They fly silently, without flapping their wings, in order to surprise the prey - The owl silently glides or drops on its prey, grabbing it with its talons and beak - The owl eats the prey, or carries it back to its perch -???
output answer: Owls hunt around their hunting territory away from where they roost during the day

input question: What is the missing first step of the following process:  -  An electrical source, like a battery, produces an electrical current - The electrical current flows through the wire - The electrical current creates a magnetic field around the wire, magnetizing the metal - The magnetic field can be turned on and off by starting or stopping the electricity source -???
output answer: A conducting metal, like copper, is wrapped around a piece of metal

input question: What is the missing first step of the following process:  -  May come from different sources - The gases remain trapped in the atmosphere - Through the suns light the gases hold in heat and energy - Trap them in our atmosphere - The earth may become warmer this way.???
output answer:
Several types of gases form in the atmosphere