Ques:Sonar is used to find the location of an object, and sonar bounces sound waves off the bottom of the ocean. Given these facts, doing what with sound waves off the bottom of the ocean is used to find the location of objects among the following options: - observe it - skipping them - Electrical energy - rolling them - focusing a lens - hopping them - bouncing them - reflecting light

Ans:bouncing them
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Ques:Dehydrating food is used for preserving food, and food is then dehydrated in slow oven or dehydrator. Given these facts, how is food preserved among the following options: - liquid - moistness - hydration - bacteria - mold - heat - Cooking - drying

Ans:drying
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Ques:Abalance is used for measuring mass of an object, and masses are measured by difference on a balance. Given these facts, how is mass indicated among the following options: - movement - motion - layers of fat - forces - set number - energy - a balance - similar

Ans:a balance
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Ques:Temperature falls from lower to higher altitudes, and heat and temperature are the same. Given these facts, the measurement of what falls from lower to higher altitudes among the following options: - snow - rain - Energy - heat - Inches - meters - H 2 O - motion

Ans:
heat
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