One hypothesis for the formation of life suggests that amino acids were carried ready-made to Earth by ________
A) solar radiation
B) prokaryotes
C) carbonaceous chondrites
D) lightning
Answer: C
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What is a wave period?
A) The horizontal distance between two successive crests or troughs B) The number of waves passing a fixed point per second C) The time for a wave to move the distance of one wavelength D) The end of a wave train
Which of the following best matches the description?Heat energy that is used to change matter from a solid to liquid or gas.
A. entropy B. respiration C. proton D. photosynthesis E. acid F. combustion G. electron H. isotope I. latent heat J. pH K. neutron L. enzyme M. kinetic energy N. ion O. nucleus P. potential energy Q. base
Farming for the primary purpose of feeding one's family is known as
A) commercial farming. B) family farming. C) subsistence agriculture. D) small scale farming. E) targeted agriculture.
A research team is studying the velocity of seismic waves in various types of rock. Using explosives, they create small explosions to study how fast the energy waves will travel
Using the velocity data below, infer which rocks are higher in density and which are lower in density. Which rock or rocks have the highest density? Rock A: 7 km/s Rock B: 5.9 km/s Rock C: 7.2 km/s Rock D: 6.1 km/s Rock E: 6.25 km/s A) Rock C B) Rocks B & D C) Rocks B, D, & E D) Rocks A & C