Q: Q: What device detects and measuresee earthquake waves? Choices: - stenograph - polygraph - sphygmomanometer - seismograph A:
A: seismograph

Q: Q: What causes a small scrap of paper placed on top of the water droplet to float , although the object is denser (heavier) than the water? Choices: - diffusion - transfusion - van der waals force - surface tension A:
A: surface tension

Q: Q: What do you call the point at which the entire weight of a body may be considered to be concentrated? Choices: - center of earth - complex of gravity - direction of gravity - center of gravity A:
A: center of gravity

Q: Q: Preserved remains or traces of organisms that lived in the past are known as what? Choices: - archives - deposits - skulls - fossils A:
A: fossils