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7th Grade Science Final
Terms in this set (94)
A testable statement
The thing you model your hypothesis after
Steps taken to test a hypothesis
The details you notice. They are either qualitative or quantitative.
The relationship between variables
A statement concerning the relations between 2 or more factors of variables that can be observed to be true under ALL circumstances.
An idea(s) that explains a group of facts or a phenomena
A representation of something
Something that changes
The thing(s) you change that you can control
Changes as a result of the independent variable changing
Variable that does not change, it stays the same.
Something that is inferred (EX: Conclusion)
1/1000 base units (1000 milli= 1 base)
1/100 base units (100 centi= 1 base)
How many meters are in 10 km?
What do all rocks contain?
What is weathering?
When a rock is worn down by natural exposure
What is erosion?
The action of the exogenic process, or the movement of sediments
What force cause weathering and erosion?
How do scientists know what the layers of the Earth look like?
Earthquake data tells if the layers of the Earth are liquid or solid.
What is most of Earth's surface covered with?
What tests are used to identify minerals?
Streak, hardness, luster, cleavage, chemical reaction and color
How hard a mineral is
What scale is used to test the hardness of a mineral?
Moh's Hardness Scale
Color of a powder from a rock
How easily a mineral breaks along a smooth, hard surface (How the mineral breaks)
How light reflects off of a mineral
How the mineral reacts to a chemical
How are fossils formed?
When Sedimentary Rock replaces organisms, they are preserved as fossils.
What type of rock are fossils found in?
What layers are older fossils found in?
The older the fossil, the farther down it will be in the layers
What is responsible for the movement in the Mantle?
One plate goes underneath the other as they collide
Plates slide past each other
What geologic events occur at plate boundaries?
Volcanoes, earthquakes, mountain building and crust destruction
What is faulting?
Breaks in the Earth's crust caused by plates moving against each other, making them crack.
Which plate has the most earthquakes and volcanoes around its border?
The Ring of Fire
What is the formula for Density?
What happens to the buoyancy of an object as the density increases?
The buoyancy level decreases
What is the density of water?
During evaporation what happens to the heat energy?
The liquid component of the Earth
What happens to the air pressure as you increase in altitude?
Is heat energy gained or lost during freezing?
Is heat energy lost or gained during melting?
Is heat energy lost or gained during boiling?
Is heat energy lost or gained during condensation?
Does the rate of motion between molecules increase or decrease as the temperature increases?
Does the distance between molecules increase or decrease as the temperature increases?
A substance has a freezing point of -25 Celsius and a boiling point of 75 Celsius. What are the temperatures that this substance would be a liquid?
-24 Celsius - 74 Celsius
Do liquid molecules take the shape of the container?
What is the smallest building block of matter?
Do like charges attract? Or do unlike charges attract?
Unlike charges attract
What are valence electrons?
Electrons on the outermost shell of an atom
Where are the metals and non-metals located on the Periodic Table of Elements?
Where are the protons located?
In the nucleus
What is the charge of a proton?
What is the charge of a neutron?
Where are the electrons located?
Outside of the nucleus
Where are the neutrons located?
In the nucleus
What is the charge of an electron?
During which types of changes are chemical bonds broken or formed?
Burning wood is an example of what kind of change?
Melting, freezing, evaporation and condensation are all examples of what type of change?
Rusting is an example of what kind of change?
Dissolving is an example of what type of change?
Stretching is an example of what type of change?
A mixture where one substance dissolves into another substance evenly
A substance that dissolves under all other substances, or other substances to form a solution.
Dissolves in the solvent
Law of Conservation of Matter
States that matter can never be created nor destroyed
What is the pH of acids?
What is the pH of bases?
What is the pH of neutral?
Is lemon juice a base, acid or neutral?
Is blood a base, acid or neutral?
Is water a base, acid or neutral?
A device consisting of a bar that can be turned around a fixed point
Made of linked wheels that increase the force a person can exert
A plane surface used as a simple machine to raise or lower a load
A double-sided inclined plane
An inclined plane wrapped around a wedge or cylinder
Wheel and Axel
A large wheel with a smaller wheel in the center. The larger wheel (the greater distance), the force needed to move an axel is decreased.
What is friction?
The force that pushes back, it slows or stops a movement
What would a graph look like if an object were slowing down?
The line would curve down
If you press against a wall with a force of 10 N and it does not move, how much force from the wall is pressing back at you?
More than 10 N
What is the formula for acceleration?
What is the formula for speed?
A car accelerates at 5 meters/S(2) when a 20 Newton force is applied to it. Which force would cause this object to accelerate at 10 meters/S(2)?
All things should theoretically fall to earth with the same speed, but what slows some object?
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