Answer the following question given this paragraph: Materials that eject electrons when illuminated with light, such as potassium, are called photoemissive. Not all materials are photoemissive, nor are all light sources capable of initiating electron emission from a given substance. For example, in Figure above , we see that 700 nm light will not initiate electron ejection, while 550 nm light will. Q: What are materials that eject electrons when illuminated with light called? Choices: - fragmentation - photogenic - illumination - photoemissive A:
photoemissive

Answer the following question given this paragraph: Although the nervous system is very complex, nervous tissue consists of just two basic types of nerve cells: neurons and glial cells. Neurons are the structural and functional units of the nervous system. They transmit electrical signals, called nerve impulses. Glial cells provide support for neurons. For example, they provide neurons with nutrients and other materials. Q: Nervous tissue consists of just two basic types of nerve cells: neurons and? Choices: - white blood cells - red blood cells - mammalian cells - glial cells A:
glial cells

Answer the following question given this paragraph: Yes! The outer core, anyway. The outer core is liquid metal, like in this photo. Of course, the metal is under an incredible amount of pressure. Q: What is the outer core made of? Choices: - compressed air - solid rock - solid iron - liquid metal A:
liquid metal

Answer the following question given this paragraph: Most musical instruments use resonance to amplify the sound waves and make the sounds louder. Resonance occurs when an object vibrates in response to sound waves of a certain frequency. In a musical instrument such as a guitar, the whole instrument and the air inside it may vibrate when a single string is plucked. This causes constructive interference with the sound waves, which increases their amplitude. Q: What happens do the sound during a resonance? Choices: - it becomes quieter - it dissipates - it echoes - amplified, it becomes louder A:
amplified, it becomes louder