Term
| What is the scientific method and all of it's steps? |
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Definition
The scientific method is a series of steps for a procedure that scientists use.
Steps :
Ask a question/recognize the problem
Research the problem
Make a hypothesis
Test the hypothesis
Draw a conclusion
Communicate the results |
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Term
| What is a controlled experiment? |
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Definition
| An experiment that isolates the effect of one variable on a system by holding constant all variables but the one under observation. |
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Term
| Convert into scientific notation : 3.1x10^7 and 3.1x10^-7 |
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Definition
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Term
| What are the basic SI (metric) units for mass, temperature, length, and volume? |
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Definition
Mass : gram
Temperature : Celsius
Length : meter
Volume : liter |
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Term
| What are the values of kilo, hecto, deka, deci, centi, and milli? |
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Definition
Kilo : 1000
Hecto : 100
Deka : 10
Deci : 0.1
Centi : 0.01
Milli : 0.001 |
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Term
| What are the basic tools for measuring mass, temperature, length, and volume? |
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Definition
Mass : triple beam balance
Temperature : thermometer
Length : metric ruler
Volume : graduated cylinder |
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Term
| Convert the following measurements : 25mm to dkm, 0.034hg to cg |
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Definition
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Term
| What is the conversion of mass? |
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Definition
| any isolated system is constant and is independent of any chemical and physical changes taking place within the system |
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Term
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Definition
| Distance light travels in a year |
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Term
| Why do we have day and night on Earth? Why do we have seasons? |
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Definition
| We have day and night due to the rotation of Earth on it's axis. We have seasons due to Earth's tilt on it's axis. |
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Term
| Approximately how old is the universe? |
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Definition
| It is about 13.7 billion years old. |
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Term
| What is the Big Band Theory? |
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Definition
| The Big Bang Theory is the burst of our Universe existence. |
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Term
| How long does it take for the moon to go through it's phases? To travel around the Earth? |
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Definition
| It takes about a month for the moon to fully go through its phases and travel around the sun. |
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Term
| Define : Independent variable |
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Definition
| One factor changed by the experimenter |
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Term
| Define : Dependent variable |
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Definition
| Factor being measured in an experiment |
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Term
| How many galaxies are in the universe? |
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Definition
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Term
| How will the sun change as it ages? What could happen to the inner planets? |
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Definition
| It sun will lose fuel and die out. The inner planets would get very cold. |
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Term
| What are the main differences between inner and outer planets in our galaxy? |
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Definition
The four inner planets are closest to the sun and are solids made up of rock and metals.
The four outer planets are made of gases. |
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Term
| How are galaxies classified? |
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Definition
| Four major types: spiral, barred spiral, elliptical, and irregular |
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Term
| What are the main differences between heliocentric and geocentric belief? |
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Definition
Heliocentric is the belief that the sun is the center of which everything revolves around.
Geocentric is the belief that the Earth is the center and everything revolves around it. |
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Term
| What are Newton's 3 laws of motion? |
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Definition
1. An object at rest will remain at rest unless acted upon by an outside force.
2. The acceleration of an object is dependent upon two variables, the net force and mass
3. A force is a push or pull upon an object that results from its interaction with another object |
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Term
| Define : Graduated cylinder |
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Definition
| It is a tool to use for measuring liquid |
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Term
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Definition
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Term
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Definition
| How fast an object moves in a specific direction |
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Term
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Definition
| A change in velocity over a change in time |
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Term
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Definition
| More than one force that acts on an object |
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Term
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Definition
| The action of one surface or object rubbing against another |
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Term
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Definition
| Anything that has mass and takes up space |
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Term
| Define : Heterogeneous mixture |
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Definition
| When you are able to see the different parts and are not evenly distributed |
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Term
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Definition
| When two or more atoms are chemically combined |
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Term
| Define : Homogeneous mixture |
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Definition
| When you can not see the different parts and is evenly distributive |
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Term
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Definition
| Has a true shape and molecules are packed together |
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Term
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Definition
| When the sun is the center of the Solar System |
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Term
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Definition
| It flows freely but of constant volume |
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Term
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Definition
| When forces are pushing or pulling in one direction are the same amount of force being used |
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Term
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Definition
| The action of twirling on an axis |
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Term
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Definition
| When the Earth is the center of the Solar System |
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Term
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Definition
| The temperature at which a liquid turns into a solid |
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Term
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Definition
| A pure substance that cannot be broken down by chemical means |
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Term
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Definition
| Any substance that has a fixed composition and definite properties |
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Term
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Definition
| Has no shape and molecules are fast moving |
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Term
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Definition
| The effect when the position or direction of an object appears to be different when viewed from different positions |
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Term
| What is the name of the slope when the graph is a distance-time graph? |
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Definition
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Term
| What is the difference between a pure substance and a mixture? |
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Definition
| A pure substance has only one kind of atom or molecule while a mixture has a number of different pure substances mixed together |
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Term
| Why is a mixture different from a compound? |
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Definition
| A mixture is two or more pure substances are PHYSICALLY combined while a compound is when it is CHEMICALLY combined |
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Term
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Definition
| Had the theory that the earth was the center of the universe. |
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Term
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Definition
3 Laws of Motion:
1st-An object at rest will stay at rest (& motion) unless acted upon by an unbalanced force |
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Term
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Definition
| Determined the circumference of the earth |
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Term
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Definition
| Had the theory that earth rotates in ellipses. |
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Term
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Definition
| Had the theory that planets orbit in epicycles. |
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Term
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Definition
| Created the Bohr diagram which has to do with energy levels of electrons |
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Term
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Definition
| Had the atomic theory and that atoms cannot be split |
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Term
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Definition
| Had the theory that earth rotates around the sun. |
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Term
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Definition
| Objects with different mass but similar sizes fall at the same rate. |
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Term
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Definition
| Most mass of an atom comes from the center |
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Term
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Definition
| Had the theory that the earth was the center of the universe. |
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Term
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Definition
3 Laws of Motion:
1st-An object at rest will stay at rest (& motion) unless acted upon by an unbalanced force |
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Term
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Definition
| Determined the circumference of the earth |
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Term
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Definition
| Had the theory that earth rotates in ellipses. |
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Term
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Definition
| Had the theory that planets orbit in epicycles. |
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Term
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Definition
| Created the Bohr diagram which has to do with energy levels of electrons |
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Term
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Definition
| Had the atomic theory and that atoms cannot be split |
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Term
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Definition
| Had the theory that earth rotates around the sun. |
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Term
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Definition
| Objects with different mass but similar sizes fall at the same rate. |
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Term
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Definition
| Most mass of an atom comes from the center |
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Term
| Elements on the periodic table are organized by what two things? |
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Definition
| By increasing atomic number and arranged in "groups" and "periods" |
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Term
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Definition
| A process by which liquid is converted into a vapor form |
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Term
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Definition
| When Earth is revolving around the sun |
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Term
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Definition
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Term
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Definition
| 1 or 2 letter symbol on top of an element |
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Term
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Definition
| The thing that dissolves a solute. |
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Term
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Definition
| The thing that is dissolved by a solvent. |
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Term
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Definition
| When earth is farthest away from the sun. |
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Term
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Definition
| When the earth is the closest to the sun. |
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Term
Tell me which of the following are physical or chemical changes.
-freezing point
-density
-rusting iron
-cooking eggs
-burning woods
-dissolving salt
-buoyancy |
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Definition
Physical=
-Freezing point
-buoyancy
-density
Chemical changes
-rusting iron
-burning wood
- |
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Term
| An arrow released from an archer's bow travels at a speed of 65 m/s for 22.5 seconds. How far does the arrow travel? |
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Definition
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Term
| A driver is traveling east on a dirt road when she spots a deer in the middle of the road. She slows her car from 45 m/s to 12 m/s in 7.5 seconds. What is the acceleration? |
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Definition
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Term
| A piece of tin has a mass 16.52 g and volume of 2.26 cm{3}. What is the density of the tin? |
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Definition
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Term
| Find the density if the mass is 250 g and volume is 15 cm {3} |
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Definition
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Term
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Definition
| Smallest particle of matter |
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Term
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Definition
| Negative charged particle |
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Term
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Definition
| The number of protons added to the number of neutrons |
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Term
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Definition
| Positive charged particle |
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Term
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Definition
| Each horizontal row of the periodic table |
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Term
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Definition
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Term
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Definition
| Either positive or negative charged atom |
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Term
| Define : Groups / Families |
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Definition
| Each vertical column of the periodic table |
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Term
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Definition
| An element that conducts heat and electricity poorly |
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Term
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Definition
| An element that is a shiny solid and can be shaped and stretched |
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Term
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Definition
| An element or compound that can conduct electricity under certain conditions |
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Term
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Definition
| A group of atoms held together by chemical forces |
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Term
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Definition
| A large riddish star late in its life cycle |
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Term
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Definition
| A large explosion in which a massive star collapses and throws its outer layers into space |
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Term
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Definition
| A mixture of which particles of a material are more or less evenly dispersed throughout a liquid or gas |
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Term
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Definition
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Term
| Why do atoms have no electric charge? |
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Definition
| The negative charge of the electrons balances the positive charge of the protons |
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Term
| Why do ions have a charge? |
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Definition
| It can either gain an electron, making it a negative charge, or losing an electron, making it a positive charge |
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Term
| If an object is at rest, what are its speed, velocity, distance, & acceleration? |
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Definition
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Term
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Definition
| vertical rows in the periodic table |
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Term
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Definition
| boiling point is when the temperature of a liquid hits 100 degrees Fahrenheit |
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Term
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Definition
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Term
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Definition
| a change in state of matter from a gas state to a liquid state. |
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Term
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Definition
| When the temperature of water is 32 degrees Fahrenheit |
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Term
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Definition
| When the state changes from a solid to a liquid. |
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Term
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Definition
| When a liquid goes into its vapor form |
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Term
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Definition
| Everything revolves around the sun. |
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Term
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Definition
| number of protons and neutrons |
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Term
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Definition
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Term
| What is always true about the density of a substance? |
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Definition
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Term
| Explain the difference between a pure substance and mixture. |
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Definition
| A pure substance is any substance that has a fixed composition and definite shape. A mixture a combination of more than one pure substance physically combined. |
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Term
| What are the parts of a solution? |
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Definition
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Term
| What are the ways you can dissolve a solute faster? Give all three and how they change the process. |
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Definition
| increase temperature, surface area, stirring |
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