Science Matter Test Flashcards
Atoms
- Tiniest particles of matter
- Building blocks of matter
- Same properties as matter
- smallest part of element
- Found in nucleus
- Never seen before
Review mass weight volume density flashcards!!!!
Nitya
Matter
Anything that takes up space and has mass.
Protons
Positively charged
Found in nucleus
What is chemistry
Study of matter
Special properties
Shape, size, color, oror
Electron
Negatively charged
Circles the nucleus in an electron cloud
Molecule
All matter Is made of molecules
Must be chemically joined together
Elements
Can’t be broken down
Made of one kind of atom
Can’t be simplified
Compound
Diff atoms joined to form molecules
Made of many molecules
Have formulas
Mixtures
No chem. reaction
2+ subs., compounds, or both
No symbols or formulas
Properties are not always the same
Analogy: Smallest amount of ice cream? 2+ scoops of same IC Diff flavors of IC List of IC
Smallest scoop of IC= atom
2+ scoops of same IC is molecule
Diff flavors of IC is compound
List of IC is elements
Conservation of matter
Matter cannot be created or destroyed, it can only change its form
How many elements in the periodic table
109
General properties
Mass, weight, volume, density
How many elements made by nature and scientists
90 from nature, 19 by man
What is solubility?
The ability of a liquid( solvent) to dissolve a substance(solute)
THE ABILITY FOR A SUBSTANCE TO DISSOLVE IN ANOTHER SUBSTANCE
What is a solution?
A mixture with the dissolved substance or solute and the solvent
A mix of 2 subs.
What is a solvent?
A solvent is a liquid which dissolves a substance.
It usually has a greater amount
Dependent variable
What is observed, measured
Effect of independent variable
Data
WHAT DO I MEASURE
Solute?
It is the substance that dissolves in the solvent to form a solution
What are the 4 states of matter?
Gas
Liquid
Solid
Plasma
What is a phys. Chan
Doesn’t change substances chemical identity
THE FORM OR APPEARANCE OF MATTER CHANGES, BUT NOT ITS COMPOSITION. DOES NOT FORM NEW SUBSTANCE!!!
Reversible change
Same materials
Chem. properties?
Reactivity is subs. Reacting to each other
Flammability is how easily a sub. Burns when exposed to fire
What is the Periodic Table?
Chart that classifies all the elements and their symbols in a way that is easy to understand
Neutron
No charge
Found in nucleus
Control variable
Things that could change but don’t
Kept constant or the same
Allows for fair test
WHAT STAYS THE SAME
Name some chem. change indicators
Heat, energy or light Color Odor New substance Change in mass Gas produced
Scientific process
Question Observation Prediction, hypothesis Materials Procedure, safety rules Results Conclusion Reflection
Independent variable
What is tested by the scientist
WHAT IS CHANGED (by scientist)
Chem change
Irreversible
Forms new substance
2+ chem. change indicators
Suspension
Occurs when particles don’t dissolve
Mixture turns cloudy
Speed of molecules and arrangement of gas
Very very fast
Spread out
Speed of molecules and arrangement of solid
Very very slow
Compact and close together
Speed of molecules and arrangement of liquid
Moderate speed
Random spread in between liquid and gas
Saturated
2 much dissolving in one substance
There is still the substance left at the bottom
How does a substance change form
Energy
Universal solvent
Water
How do particles move When heated
Faster
Density of water?
What will float/sink?
D= 1g/ml^3
Greater density. Sink
Lower density. Float
What’s released during chem. reaction?
Energy
Soluble
Solid that dissolves in a liquid
