Answer the following question given this paragraph: An element is a pure substance that cannot be broken down into different types of substances. There are almost 120 known elements ( Figure below ), each with its own personality. The chemical and physical properties of one element differ from any other. Elements are arranged according to their properties in the Periodic Table . Q: What do you call a pure substance that cannot be broken down into different types of substances? Choices: - molecule - sample - compound - element A:
element

Answer the following question given this paragraph: Electric energy is measured in joules per second, or watts. Q: What is another term for joules per second? Choices: - jiffies - jacobs - parsons - watts A:
watts

Answer the following question given this paragraph: Acceleration is the rate of change of velocity. So in other words, acceleration tells you how quickly the velocity is increasing or decreasing. An acceleration of indicates that the velocity is increasing by in the positive direction every second. Q: What is the rate of change of velocity called? Choices: - transmission - vibration - speed - acceleration A:
acceleration

Answer the following question given this paragraph: Muscle tissue in the walls of internal organs such as the stomach and intestines is smooth muscle . When smooth muscle contracts, it helps the organs carry out their functions. For example, when smooth muscle in the stomach contracts, it squeezes the food inside the stomach, which helps break the food into smaller pieces. Contractions of smooth muscle are involuntary. This means they are not under conscious control. Q: What will the contraction of smooth muscles help organs do? Choices: - fine motor movements - move joints - move across distances - carry out functions A:
carry out functions