A loudspeaker changes _________ energy into sound energy.
A loudspeaker changes _________ energy into sound energy.
A. Chemical
B. Electrical
C. Light
D. Kinetic
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How many milky teeth or primary teeth does a human have?A. 33
B. 20
C. 15
D. 32Humans usually have 20 primary (deciduous, “baby” or “milk”) teeth and 32 permanent (adult) teeth. Most people know these teeth as baby teeth, though they are also sometimes called milk teeth or primary teeth. In all, children have 20 baby teeth – 10 on the top and 10 on the bottom. These teeth act as placeholders for the adult teeth that grow in after the baby teeth fall out.
What are considered the building blocks of matter?
What are considered the building blocks of matter?
A. Molecules
B. Protons
C. Elements
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Tooth decay is caused by?A. Salt
B. Sugar
C. Calcium
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Boiling of an egg is a change which is__________?
A. Physical
B. Chemical
C. Physiological
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As you go down into a well, your weight__________?A. Slightly increases
B. Slightly decreases
C. Remains the same
D. None of these