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Ch 11 Sci Info
Matter and It's Properties
Question | Answer |
---|---|
How many elements are in carbon dioxide? | two: one atom of carbon and two atoms of oxygen |
What are the properties of metals? | color, hardness, texture |
Do properties of metals change if you bend, cut or crush it? | no |
How do phase changes occur? | the phase of matter changes as the arrangement and movement of its atoms or molecules change |
Describe the particles of a solid. | particles of a solid are very close together |
Does matter in a liquid state have a definite shape? | no - the particles can move about |
What caused dew to form? | condensation (gas turns to liquid) |
What type of compound is held together by opposite charges? | salt |
What types elements does salt have? | at least one metal and one nonmetal |
When are crystals formed? | when charged particles arrange themselves in a regular geometric pattern |
Are salt crystals brittle? | yes |
What temperature is needed to melt salts? | very high |
Why do materials get smaller when cooling? | their particles move more slowly and there is less space between them |
What are the parts of a solution? | solute and solvent |
What is a solvent? | the substance in which the solute is being dissolved |
What is a solute? | the substance that is dissolved |
Why can materials in simple mixtures be separated? | they have different properties |
What is mass? | the amount of matter in an object |
What is weight? | the measure of the pull of gravity on an object |
What is volume? | the amount of space an object takes up |
What is density? | a measure of the amount of matter in a given volume |
How do you find the density of an object? | divide the object's mass by its volume (D=m/v) |
What is buoyancy? | an objects ability to float |