ACT SCIENCE Study guides, Class notes & Summaries

Acceleration - ANSWER The rate that velocity changes per unit time and the direction it changes in. Computed from the change in velocity divided by the change in time. Common units are meters per second squared (m/s2 ). Acceleration due to gravity - ANSWER The acceleration of an object that is only acted on by the force of the Earth's gravity. This value is given the symbol g and near the surface of the Earth it has a value of approximately 9.8 m/s2. The direction of the acceleration due t...

Mitochondria - ANSWER Organelles that act like a digestive system, which takes in nutrients, breaks them down, and creates energy rich molecules (ATP) for the cell. Lysosomes - ANSWER Hold enzymes, digest food and break down the cell when it dies Cell Nucleus - ANSWER The brain of the cell. It contains the cell's DNA, or the genetic information from which proteins are made It also helps control eating, movement, and reproduction.

Name the three question types and their percentage - ANSWER Data representation 35% research summaries 50% conflicting viewpoints 15% What does data rep have you do three things - ANSWER 1read graps 2interpret Scatter Plots questions about grafs 3explained information What do you do on Research summaries - ANSWER Interpret the design and results of the experiment questions about study ones 32in study 3

acceleration - ANSWER Change in velocity divided by the time it takes for the change to occur accuracy - ANSWER A description of how close a measurement is to the true value of the quantity measured. acid - ANSWER A substance that increases the hydrogen ion concentration of a solution. atom - ANSWER Basic unit of matter

absolute - ANSWER existing independent of any other cause accuracy - ANSWER freedom from mistake, exact adverse - ANSWER acting against or in an opposite direction analogue - ANSWER similar or comparable in certain respects analyze - ANSWER to study the relationship of the parts of something by analysis application - ANSWER ability to put to a practical use, having something to do with the matter at hand approximately - ANSWER nearly, an estimate or figure that is almost exact

Types of ACT Science Passages - ANSWER direct variation - ANSWER If y = k x, where k is constant, the relationship between x and y is called a direct variation and the graph is a straight line. indirect variation - ANSWER If y = a/x, where a is constant, the relationship between x and y is called an indirect variation and the graph is a hyperbola. direct relationship - ANSWER If y increases as x increases, there is a direct relationship between x and y but not necessarily a linear relation...

acceleration - ANSWER Change in velocity divided by the time it takes for the change to occur acceleration due to gravity - ANSWER 9.8 meters per second squared accuracy - ANSWER A description of how close a measurement is to the true value of the quantity measured. acid - ANSWER A substance that increases the hydrogen ion concentration of a solution. analysis - ANSWER A detailed examination of the elements or structure of something. aqueous solution - ANSWER a solution in which water is t...

Atria - ANSWER Upper chambers of the heart Base - ANSWER A substance that decreases the hydrogen ion concentration in a solution. Calibration - ANSWER Any procedure used to evaluate the accuracy of a measurement system and, when sources of error are found, to use that information to correct or improve the measuring system