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| the smallest unit of an element that maintains the chemical properties of that element |
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| the number of protons in a nucleus of an atom |
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| the increase of rate or speed of somthing |
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| the temperature and presurre at which a liquid becomes a gas |
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| the point in the orbit of a plante or a comit |
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| Can be classified as either a substance or compound. Anything that can take up space. |
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| Define the word Molecule? |
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Definition
If a compound is broken down into smaller pieces.
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| Define the word Heterogeneous Mixture |
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Definition
When you can see the different parts. Does not look the same from top to bottom.
Ex.Orange Juice Salad Dressing |
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| A number of small dense objects which rotate very rapidly, which make radio waves etc. |
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| A homogeneous molecular mixture of two or more substances. |
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| Has a rigid struture, has a true shape, not able to move as easily. |
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| Has a negative charge, found outside the nucleus. |
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| Define the word Chemical Symbol |
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Definition
| Is a one to two letter chemical element derived from the element name. Ex Tin=Ti |
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| Define the word Net Force |
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Definition
| Combination of all forces that act on an object. |
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| The action of one surface or object rubbing against each other. |
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| Define the word Revolution |
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Definition
| Is when the earth revolves around the sun. |
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| Define the word Heliocentric |
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Definition
| Sun centered, and everything else around it. |
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| Define the word Elliptical |
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Definition
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| Define the word Evaporation |
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Definition
| The change of liquid into a vapor at a temperture below the boiling point. |
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| Define the word Melting Point |
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| The temperature at which a solid turns into a liquid. It is equal to the freezing point. |
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| Any large group of chemical elements. Ex gold, iron, copper, and lead. |
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| He proposed the ptoiemac system which explains how the plants, sun and even the stars orbit around the sun. |
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| Was a famous scientist, mathematician, and astronomer. He came up with the theory of gravity. |
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| Was a russian chemist and he made up the modern periodic table. |
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| English school teacher who revised the atomic theory/developed the modern atomic theory. |
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| A scientist who made up the terms perihellion-where the planet is closest to the sun. Also aphellion-where the planet is farther from the sun. Also he thought the orbit around the sun is an ellipes. |
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Definition
| He was the first man to estimate the circumference and tilt of the earth. |
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| What is the scientific method and all its steps? |
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A method of procedure, to approah a problem.
1 Observation
2 Question
3 Collect Data
4 Hypothesis
5 Experiment
6 Conclusion
7 Theory of New Hypothesis |
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| What is a controlled experiment? Why is it important |
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Definition
| A single variable by changing it while keeping all other variables the same. It is important because them you could test the experiment both ways. |
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| Convert the following in scientific notation 1.) 3.1x107 and 2.)3.1x10-7 |
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Definition
| 1.) 31000000 2.) 0.0000031 |
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| What are all the basic SI units for mass, temperature, length, and volume? |
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Definition
Mass=Grams Temperature=Kelvin
Length= Meters
Volume=Liters |
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| WHat are the values and the meanings of kilo, hecto, deka, deci, centi, and milli? |
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Definition
Kilo=Kilometer 10 to the 3rd power
Hecto=Hectometer 10 to the 2nd power
deka=dekaometer 10 to the 1st power
deci=decimeter 10 to the negitive 1
centi=centimeter 10 to the negitive 2
milli=millimeter 10 to the negitive 3 |
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| What are the basic tools for measuring mass, temperature, length, and volume? |
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Definition
Mass=triple beam balance
Volume=beaker
Length=rulers
Temperature=thermometers |
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| Convert the following measurments 2500mm to dkm, and 0.034hg to cg |
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Definition
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| What is Conservation of Mass? Why is it important? |
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Definition
| A principle stating that mass cannot be created or destroyed. This is important because everything is mainly made of mass. |
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| In the compound Al2, how many atoms are there? Oxygen atoms? |
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Definition
| 13 atoms and oxygen atoms 2. |
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| Which of the following are physical and chemical changes? Freezing point, density, rusting iron, cooking eggs, burning wood, dissolving salt, and buoyancy? |
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Definition
Freezing point=physical
Density=physical
Rusting iron=physical
Cooking eggs=chemical
Burning wood=chemical
Dissolving salt=chemical
Buoyancy=physical |
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| What is true about a density of a substance? |
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Definition
| The density of a substance is the same regardless of the size. |
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| Explain the difference between a pure substance and a mixture? |
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Definition
| A pure substance is when matter is a single element or a single compound Ex chemical formula, elements, compound, molecule, and atoms. A mixture is substances that are combine but not chemicals Ex homogeneous , and heterogeneous. |
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Term
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Definition
when one element wants to complet its octet by removing electrons from its shell |
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| what are two types of bonding?explain the proccess of each type. give examples |
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Definition
ionic,covalent
ionic-happens when two atoms have a large diffrence in electrons
covalent-when two atoms has a small diffreence in eletrons |
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| how many galaxies exist in the universe |
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Definition
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Definition
- A unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012km
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| what are the main diffrences between the inner and outer plants of our galaxy? |
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Definition
The inner planets are smaller, and do not have the dense atmospheres of the outer planets. The four inner planets (Mercury, Venus, Earth, and Mars) have warmer temperatures than the exteriors of the outer planets (Jupiter, Saturn, Uranus, and Neptune).
The "gas giants" have very hot lower atmospheres, caused by the intense pressure. The atmospheres are mostly hydrogen, but for Uranus and Neptune there are higher levels of water, methane, and ammonia. All of the gas giants have multiple moons and rings, the most visible being the ice rings around Saturn. |
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| how many galaxy classifed? |
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Definition
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| why do we have day and night ?why do we have seasons? |
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| If an object is at rest, what are its speed, velocity, and acceleration? |
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Definition
| These three objects are always moving no matter what the speed or acceleration. |
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| Calculate speed, velocity, distance, time, and acceleration |
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Definition
| speed=d/t velocity=d/t time=d/t acceleration=vf-vi/t |
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| What is the name of the slope on a distance-time graph? |
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Definition
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| Can you have a negative slope on a graph? |
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Definition
| Yes, because when you are plotting a regular graph you have the line etc. come from the lower left corner to the upper right hand corner but with the negative graph it would be the same thing but coming down from the upper left corner to the lower right corner. |
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| Why is a computer more accurate than a person when timing data? |
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Definition
| Today our computers are faster and more accurate. With a person you could have many complications like not timing correctly, or setting up the graph wrong etc. |
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