Answer the following question given this paragraph: A Geiger counter provides a sensitive means of detecting radioactivity. A tube is filled with an inert gas, which will conduct electricity when radiation enters it. When a charged particle comes into the tube, it changes the electrical potential between the anode and the cathode. This change in potential in the tube produces a change in voltage in the electrical circuit and registers as a count. Geiger counters are fairly inexpensive and reliable, so they are useful in a wide range of applications. More complicated types of counters are also available, but are generally used in sophisticated experiments. Q: What counter provides a sensitive means of detecting radioactivity? Choices: - calorie - bouncy - gravity - geiger A:
geiger
Answer the following question given this paragraph: The radiative zone is the next layer out. It has a temperature of about 4 million C. Energy from the core travels through the radiative zone. The energy travels at an extremely slow rate. Light particles are called photons . In the radiative zone, photons can only travel a few millimeters before they hit another particle. The particles are absorbed and then released again. It may take 50 million years for a photon to travel all the way through the radiative zone. Q: In the radiative zone, light particles called what can only travel a few millimeters before they hit another particle? Choices: - electrons - positrons - neutrons - photons A:
photons
Q: Answer the following question given this paragraph: Most flatworms have a distinct head region that includes nerve cells and sensory organs, such as eyespots. The development of a head region, called cephalization , evolved at the same time as bilateral symmetry in animals. This process does not occur in cnidarians, which evolved prior to flatworms and have radial symmetry. Q: The development of a head region is called what? Choices: - trichina - spore - cocklebur - cephalization A:
A: cephalization
Question: Answer the following question given this paragraph: Amphibians play important roles in many ecosystems, especially as middle players in many food chains and food webs. In addition to consuming many worms and insects and other arthropods, and even some small reptiles and mammals and fish, they are prey for turtles and snakes, as well as some fish and birds. Tadpoles keep waterways clean by feeding on algae. Q: What do tadpoles clear out of waterways? Choices: - pollution - oxygen - disease - algae A:
Answer: algae
*Question*
Answer the following question given this paragraph: CHAPTER SUMMARY 36.1 Sensory Processes A sensory activation occurs when a physical or chemical stimulus is processed into a neural signal (sensory transduction) by a sensory receptor. Perception is an individual interpretation of a sensation and is a brain function. Humans have special senses: olfaction, gustation, equilibrium, and hearing, plus the general senses of somatosensation. Sensory receptors are either specialized cells associated with sensory neurons or the specialized ends of sensory neurons that are a part of the peripheral nervous system, and they are used to receive information about the environment (internal or external). Each sensory receptor is modified for the type of stimulus it detects. For example, neither gustatory receptors nor auditory receptors are sensitive to light. Each sensory receptor is responsive to stimuli within a specific region in space, which is known as that receptor's receptive field. The most fundamental function of a sensory system is the translation of a sensory signal to an electrical signal in the nervous system. All sensory signals, except those from the olfactory system, enter the central nervous system and are routed to the thalamus. When the sensory signal exits the thalamus, it is conducted to the specific area of the cortex dedicated to processing that particular sense. Q: What is a specific region in space within which a sensory receptor is responsive to stimuli? Choices: - deceptive field - amplify field - symmetrical field - receptive field A:
**Answer**
receptive field
(Q).
Answer the following question given this paragraph: Every plant and animal depends on its traits to survive. Survival may include getting food, building homes, and attracting mates. Traits that allow a plant, animal, or other organism to survive and reproduce in its environment are called adaptations . Q: What do you call the traits that allow a plant, animal, or other organism to survive and reproduce in its environment? Choices: - additions - advantages - settings - adaptations A:
(A).
adaptations