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Science 9 Midterm

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1.
5 points
This scale measures how acidic or basic a solution is.
2.
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A solution that using water as its main mixing ingredient.
3.
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Electrons are closest to the atom's nucleus are in the ___________________ energy level.
4.
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In an exothermic reaction, heat is __________________.
5.
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If an object loses electrons, the object will have a ______________ charge.
6.
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_____________________ is an example of a good electrical insulator.
7.
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______________________ is a complex lipid that your body uses to build cell membranes.
8.
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Presence of a catalyst __________________--.
9.
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When you rub a balloon on your hair, _____________ go from your hair to the balloon.
10.
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__________________ is the measure of how fast a reaction occurs.
11.
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To prevent overloading in a parallel circuit, you could install a ____________________.
12.
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The chemical formula __________________ represents a molecule that contains one atom of carbon and two atoms of oxygen.
13.
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A long chain of many small organic molecules is __________________.
14.
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At the center of an atom is a _____________________.
15.
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An electron _________________ is the chemical symbol for the element surrounded by as many dots as there are electrons in its outer energy level.
16.
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_________________ is the term used to describe how much solute dissolves in a given amount of solvent.
17.
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These are the building blocks of proteins.
18.
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_____________________ is an oxygen atom and a hydrogen atom joined by a covalent bond.
19.
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__________________ is the substance that dissolves into a solution.
20.
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Evidence that a chemical change has occurred includes a _____________.
21.
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An oven's high temperature speeds up chemical reactions because heat _____________.
22.
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A measure of the potential energy available in a complete circuit is ___________________.
23.
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Sodium chloride is an example of a(n) ______________________ because it contains two or more elements.
24.
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__________________ are compounds that react with acidic or basic solutions to produce certain colors.
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