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1st Semester Final Exam Review
A review of an important exam
33
Science
9th Grade
07/09/2013

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Cards

Term
The scientific method and all of its steps
Definition
It is steps to solving a scientific problem
1. I can investigate questions,conduct experiments and solve problems
2. I can create hypotheses using prior knowledge
3.I can collect, organize, and analyze data(qualitative and quantitative)
4. I can display and defend conclusions drawn from investigations
Term
A controlled experiment and why it is important
Definition
An experiment that is controlled and separates the subjects into control and experimental groups. It is important because it gives the experiment structure.
Term
Matter
Definition
Anything that has and takes up space and has mass and volume
You can taste, touch, and smell it
Term
Pure Substances
Definition
Matter that has a fixed composition and cannot be broken down
Term
Heterogeneous Mixture
Definition
Consists of two or more substances that are easily distinguishable
Term
Homogeneous Mixture
Definition
Substances that cannot be broken down
Term
The basic SI metric units for mass,temperature, length, and volume
Definition
grams, degrees,meter, and liter
Term
The basic SI metric units for mass,temperature, length, and volume
Definition
grams, degrees,meter, and liter
Term
the basic tools for measuring mass, temperature, length, and volume
Definition
mass-scale
temperature-thermometer
length- ruler
volume- beaker
Term
Convert the following measurements
2500mm to dkm, 0.034hg to cg
Definition
2.5 dkm, 34 cg
Term
Which are physcial of chemical changes
freezing point, density, rusting iron, cooking eggs, burning wood, dissolving salt, and buoyancy
Definition
freezing point- physical
density- physical
rusting iron- physical
cooking eggs- chemical
burning wood- chemical
dissolving salt- chemical
buoyancy- physical
Term
What is always true about density of a substance?
Definition
Density is always a measurement of how much matter is contained in a certain volume.
Term
Molecule
Definition
A group of atoms that are held together by chemical forces.
Term
Pulsar
Definition
Highly magnetized neutron star that emits a beam of electromagnetic radiation.
Term
Solution
Definition
A homogeneous mixture throughout which two or more substances are uniformly dispersed
Term
Atomic Number
Definition
The number of protons in the nucleus of an atom.
Term
Electron
Definition
A subatomic particle that has a negative charge.
Term
Speed
Definition
The distance traveled divided by the time interval during the motion occurred.
Term
Friction
Definition
A force that opposes motion between two surfaces that are in contact.
Term
Evaporation
Definition
The change of state from a liquid to a gas.
Term
Melting point
Definition
The temperature and pressure at which a solid becomes a liquid.
Term
Metal
Definition
An element that is shiny and that conducts heat and electricity well.
Term
Atom
Definition
The smallest unit of an element that maintains the chemical properties of that element.
Term
Compound
Definition
A substance made up of atoms of two or more different elements joined by chemical bonds.
Term
Supernova
Definition
A gigantic explosion in which a massive star collapses and throws its outer layers into space.
Term
Solute
Definition
In a solution, the substance that dissolves in the solvent.
Term
Mass number
Definition
The sum of the number of protons and neutrons in the nucleus of an atom.
Term
Proton
Definition
The subatomic particle that has a positive charge and that is located in the nucleus of an atom.
Term
Periods
Definition
Chemistry- A horizontal row of elements in the periodic table
Physics- The time it takes a complete cycle or wave oscillation to occur.
Term
Velocity
Definition
The speed of an object in a particular direction.
Term
Condensation
Definition
The change of state from gas to liquid.
Term
Nonmetal
Definition
An element that conducts heat and electricity poorly and that does not form positive ions in an electrolytic solution.
Term
Element
Definition
A substance that cannot be separated or broken down into simpler substances by chemical means.
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