Question 4 of 10 occurs when sound waves apparently bend around an obstacle.
O A. A compression wave
B. The Doppler effect
O C. Diffraction
O D. An echo

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17