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Vocab
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Multiple Choice
Bonus
100

A factor that can change in an experiment...

Variable

100

The metric kilo- represents the number...

1000

100

If an object has a volume of .21 kL, what is its volume in liters (L)?

210 L

100
Which of the following is an example of physical science?

a. counting tree rings on a stump

b. recording the types of food deer eat

c. identifying the body segments of an ant

d. measuring a car's speed


D

100
Which of the following is an important feature of for a good hypothesis?

a. It must be testable

b. It should include measurements

c It should be general and broad in scope

A

200

The smallest unit of a chemical compound, composed of two or more atoms, bonded together...

Molecule

200
What is the formula for density?
density = mass/volume
200

Mass = 4.0g

Volume = 4.0 cm3

What is the Density?

1 g/cm3

200

Which of the following as volume but no definite shape?

a. solid

b. liquid

c. gas

b. liquids

200

What is the term for the phase change in which a gas changes directly to a solid without first going through the liquid phase?

a. condensation

b. sublimation

c. evaporation

d. deposition

D. Deposition

300

Electrons that are in the highest energy level (the energy level farthest from the nucleus)

Valence electrons

300

The Atomic Mass is calculated by...

Atomic mass = protons + neutrons

300

An atom of an element has a mass number of 38.  It has 20 neutrons in its nucleus.  How many protons does the atom have?

18 protons

300
Match the following:


a. proton    ____   negative

b. neutron  ____   positive

c. electron  ____   neutral 

c.

a.

b.

300

The law of conservation of mass states that matter cannot be ______ or _______, but changes from one form into another. 

created, destroyed

400

A molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared. 

Polar Molecule

400
How many atoms of each element are in the following molecule?


Mg2SiO4

2 Magnesium

1 Silicon

4 Oxygen

400

How many atoms are in sulfuric acid, H2SO4?

a.  3

b.  7

c.  9

b.  2+1+4=7

400
What is the most stable electron configuration for atoms?

a. every energy level has an equal number of electrons.

b. the highest energy level has a full set of electrons.

c. there is an even number of electrons. 

b. the highest energy level has a full set of electrons.


400

What is the difference between reactants and products?

Reactants are substances that undergo a chemical change and Products are new substances formed as a result of a chemical change. 

500
A chemical reaction in which two or more substances react to form a single compound. 

synthesis reaction

500

What does the formula of an ionic compound describe?

The ratio of the ions in the compound.

500

Determine the name of the following compound MgCl2

magnesium chloride

500
Which reaction type will always have oxygen as one of the reactants?

a. synthesis reaction

b. decomposition reaction

c. single replacement reactions

d. combustion reaction

d. Combustion reaction

500
Is a chemical reaction that absorbs energy from its surroundings exothermic or endothermic

endothermic