Science Stuff
Stuff for Kathy C.'s Integrated Science 9 term 1 exam- Sig Figs, Metrics, Scaling,Scientific Notation, scientific method
Does not include graphs
Does not include graphs
Terms
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- Homogeneous Mixture
- Mixture in which substances are so evenly dissolved components are not easily distinguished
- Compound
- substance that contains 2 or more elemnts joined in a fixed proportion
- micro-
- millionth
- Uses of physical properties
- Identifying materials, Choosing materials for a purpose,separating substances in a mixture
- Solid
- State of matter in which substance has a definite shape and volume
- Gas
- state of matter in which material has no definite shape or volume
- centi-
- hundredth
- SOlution
- Homogeneous mixture in which the components can only be separated by distillation. Small particles
- Chemical Property
- ABility to produce change in the composition of matter- reactivity, flammability
- Length
- straight-line distance between two points
- this kind of zero is always a sig fig
- captive
- FIltration
- A process that separates mixtures based on the size of their largest particles
- Atom
- Smallest building block of matter
- This kind of zero is sometimes a sig fig
- trailing
- accuracy
- colseness of measurement to exact value
- kilo-
- thousand
- What is the goal of the scientific method?
- to solve a problem or better understand an observed event.
- Kinetic energy
- Energy an object has due to motion
- Elements that are solid at room temperature?
- Gold, Carbon
- Symptoms of chemical change
- Formation of gas or precipitate, change in color
- Physical Properties
- density, viscosity, malleability, hardness, melting and boiling points, conductivity
- Percent Error
- 100[(observed-true)÷true]
- Formula for density
- mass÷volume
- WHy are scientific models useful
- They make it easier to understand things that might be too difficult to observe directly
- deci-
- tenth
- Kinetic Theory
- all particles of matter are in constant motion
- Heterogeneous mixture
- A mixture in which the components are noticeably different
- How is scientific law differ from scientific theory?
- One describes an observed pattern in nature without explaining it. The other explains such a pattern.
- Suspension
- heterogeneous mixture that separates into layers over time. Large particles
- Elements that are gas at room temperature?
- Oxygen, Argon
- This kind of zero is never a sig fig
- leading
- Liquid
- State of matter in which material has definite volume but not shape
- volume
- amount of space taken up by an object
- Reactivity
- How readily substances combine chemically
- mili-
- thousandth
- Scientific Notation
- A way of expressing very large or small numbers.
- Distillation
- A process that separates substances based on their boiling points
- Physical Change
- Occurs when some of a materials properties change but its composition remains the same
- Precision
- reproducability of a result
- Pure substance
- An element or compund- a substance with a fixed composition
- mass
- quantity of matter
- Chemical Change
- When a substance reacts and forms one or more new substances
- colloid
- Can be separated only by distillation, intermediate particles
- Elements that are liquid at room temperature
- Bromine, Mercury