Answer the following question given this paragraph: Science is a process for developing knowledge. Change in knowledge about the natural world is expected because there is often room for new observations which may challenge current views. No matter how well one theory explains a set of observations, it is possible that a different theory may explain them just as well or better, or may also encompass a wider range of observations. Scientists are always testing and attempting to improve theories. Scientists know that even if there is no way to gain complete knowledge about something, an increasingly accurate understanding of nature will develop over time. Q: What is the process for developing knowledge called? Choices: - evolution - theory - creationism - science A:
science
Answer the following question given this paragraph: Echinoderms lack respiratory and excretory systems. Instead, the thin walls of their tube feet allow oxygen to diffuse in and wastes to diffuse out. Echinoderms also lack a centralized nervous system. They have an open circulatory system and lack a heart. On the other hand, echinoderms have a well-developed coelom and a complete digestive system. Echinoderms use pheromones to communicate with each other. They detect the chemicals with sensory cells on their body surface. Some echinoderms also have simple eyes ( ocelli ) that can sense light. Like annelids, echinoderms have the ability to regenerate a missing body part. Q: Echinoderms lack what type of system that in humans consists of the brain and spinal cord? Choices: - autonomic system - endocrine system - peripheral nervous system - centralized nervous system A:
centralized nervous system
Q: Answer the following question given this paragraph: Types of home heating systems include hot-water, warm-air, and solar heating systems. All of them have the same basic function: producing thermal energy and transferring it to air throughout the house. Q: Different types of home heating systems all function by producing what type of energy? Choices: - electron - natural - distinct - thermal A:
A: thermal
Question: Answer the following question given this paragraph: http://www. chem. ufl. edu/~itl/2045/lectures/lec_d. html. Q: What happens to the temperature of matter as light is absorbed? Choices: - it stays the same - it triples - it drops - it increases A:
Answer: it increases
*Question*
Answer the following question given this paragraph: prepared. A student measures the radioactivity of this source with a Geiger counter and observes 1500 counts per minute. She notices that the source was prepared 120 days before her lab. What fraction of the decays is she observing with her apparatus? (b) Identify some of the reasons that only a fraction of the s emitted are observed by the detector. Armor-piercing shells with depleted uranium cores are fired by aircraft at tanks. (The high density of the uranium makes them effective. ) The uranium is called depleted because it has had its 235 U removed for reactor use and is. Q: What 'counting' instrument is used to measure radioactivity? Choices: - Liquid Counter - ellie counter - pryor counter - geiger counter A:
**Answer**
geiger counter
*Question*
Answer the following question given this paragraph: Like many other animals, sheep travel in herds. The tendency is for each individual sheep to stay with the herd. However, a sheep may sometimes wander off, depending on how strong the attraction is for a particular food or water supply. At other times, a sheep may become frightened and run off. Whether a sheep chooses to stay with the herd or go its own way depends on the balance between attraction to the herd and attraction to the outside influence. Q: What is the collective travel of sheep known as? Choices: - gaggle - load - den - herd A:
**Answer**
herd