Science Cards-test #1
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- what is the metric unit for lenth?
- meters
- what is the metric unit for mass?
- grams
- what is the metric unit for tempurature?
- kelvin
- what is the metric unit for volume?
- millimeters
- how many cemtimeters are there in a meter?
- 100
- how many meters are there in a kilometer?
- 1000
- what is matter?
- anything with mass
- solid
- fixed volume/area and fixed shape
- liquid
- no fixed shape but it has a fixed volume.
- gas
- no fixed volume/area and no fixed shape
- plasma
- gas becomes plasma when gas molecules lose electrons
- what are some things that are plasma?
- stars, neon lights and the ionospere.
- ion
- striped of electrons
- electrons
- negative charge, no mass
- nuetrons
- no charge
- isotope
- same element with the same number of protons but different number of neutrons
- atomic number
- number of protons/electons
- atomic mass
- number of protons+neutrons ( the bigger number)
- it is an isotope when...
- the exponent is a bigger number than the mass.
- what is the Big Bang?
- when all matter was condenced into one point and then the matter got too dense and exploded
- what is cosmology
- study of nature and evolution of the universe
- when did the big bang occur?
- 15-20 billion years ago
- what is the law of conservation of mass?
- all matter is neither created of destroyed in a reaction
- what is the open universe theory
- the universe will continue to expand unitll all energy is lost to nothing
- chemiluminecence
- when light is created by combining two or more chemicals
- bioluminecence
- light created by two or more living organisms
- oxidation reaction
- oxygen relaces an atom and changes the energy level causing light
- what is the order of electrons
- 2,8,8,18,18,18
- galaxy
- collection of stars, planets, gas dust ect.
- milky way is what kind of galaxy?
- spiral
- how far apart is our galaxy?
- 100,000 light years across
- what happens to the mass when two chemicals are combined?
- the mass changes
- what are ractants?
- the original substances in a reaction or equation
- what are products?
- the fianl outcome of the combination of the reactants
- single replacements
- A+BC=AB+C
- double replacments
- AB+CD=AD+BC
- Coeffiecient
- the number before the chemical
- Atoms
- only one element
- Molecule
- more than one element combined