<span>The appropriate answer is c. sonar. Oceanographers use sonar to determine the ocean depth. A sonar signal is sent from the ship. Oceanographers record the time taken for the signal to leave the ship and for it to return. Knowing the speed of sound in water, they are able to calculate the depth of the water. This method is also used to generate bathymetric images of the ocean floor. </span>
Answer:
Explanation:
Matter can change form through physical and chemical changes, but through any of these changes matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.
Answer:
Explanation:
“parasite” is a specific term, meaning an organism that lives on and harms another creature, while “pest” is a general term, meaning an unwanted or annoying organism.
By age of 6, the average child has a vocabulary of around 14,000 words. Vocabulary development can be relatively variable among children of the same ages. Children typically speak their first word somewhere around 12 months. At 18 months, they may use around 50 words or lower and there is an increase in the number of words with age.
Answer:
True
Explanation:
Change blindness happens when an observer fails to notice large changes of objects or to scenes following a brief visual disruption. That is, visual stimuli undergoes a change without the observer noticing it.
For this case, the man had change blindness .He did not notice the first construction worker he was giving direction to was replaced by a different person. This was after a brief interruption caused by two experimenters passing between them carrying a door.