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Chemistry Test

Pure Substance A material that is composed of only one type of substance. It must be either be an element or a compound.
Homogeneous Mixture A mixture that has a uniform composition and properties throughout. The substances are so evenly distributed that it is difficult to distinguish one one substance in the mixture from another.
Heterogeneous Mixture Any mixture that is not uniform in composition and parts of the mixture are noticeably different.
What is an example of a Homogeneous Mixture? pool water, no-bake cookie batter, sugar water, salt water
A solid is phase of matter. How would you best describe how the particles of a solid move according to Kinetic Theory of matter? Because of a strong attractive force between particles, the particles vibrate around fixed locations.
List the physical properties of matter malleability, conductivity, viscosity, density, melting/boiling point, hardness
List and give examples of the three properties of a mixture solution - salt water, suspension - dirt water, colloid - milk
How would you best describe the term endothermic? When the system absorbs energy from its surroundings, like melting ice.
What is a chemical change? When a reaction occurs, and one or more new substances are created. The change is not easily reverseD.
True or False: Chemistry is the study of composition, structure, properties, and reactions of matter. True
Describe the difference of Kinetic Theory between a liquid and gas. The particles in a liquid have a stronger attractive force, and particles are closer together.
If you measure the mass of 10 milliliters of water, and its mass was 10 grams. What is the density of the water? Density = mass/volume = 10 grams/10 milliliters = 1 g/ml
What are the two chemical properties? flammability and reactivity
Describe the main differences between a chemical change and physical change. A physical change will alter the shape, size, and appearance, but the substance remains the same. A chemical change will react and form one or more new substances.
Name the three primary phases of matter. Solid, Liquid, Gas
What are three types of evidence for a chemical change? A change in color, production of a gas, or formation of a precipitate.
What is a term that describes when an object releases energy to its surroundings? Exothermic
In using the example of a hot air balloon, what happens to the volume of a gas when the temperature increases? The gas particles will start to move faster and expand increasing the volume.
True or False: As the pressure of a gas increases, the volume decreases. Pressure and Volume are inversely proportional. True
What is the definition of matter? Anything that has mass and takes up space.
Created by: ashley_ginorio



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