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Physical Science Semester test- Winter 2021

Total questions: 68

Worksheet time: 47mins

Name
Class
Date
1.

A sample that is used for comparison and is treated exactly like the other experimental groups except that the independent variable is not applied to it is a(n)

a)

Observation

b)

Variable

c)

Control

d)

Hypothesis

2.

Scientists use prior knowledge to_________

a)

Collect data

b)

Make predictions about what will happen

c)

Analyze their data

d)

Serve as a control in their experiments

3.

________ is the process of obtaining information by using the senses. There are two types: Qualitative and Quantative.

a)
analyze
b)
inference
c)
observation
d)
hypothesis
4.
What type of mixture separates upon standing?
a)
Solution
b)
Alloy
c)
Colloid
d)
Suspension
5.

In a ______________, one substance is dissolved in another substance.

a)

solution

b)

suspension

c)

colloid

6.
Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change. 
a)
Chemical then Physical 
b)
Physical then Chemical
c)
Both Physical
d)
Both Chemical
7.
Liquid has a definite ___________, but a variable _____________.
a)
shape, volume
b)
mass, area
c)
smell, taste
d)
volume, shape
8.
The relationship of which two variables are compared in Boyle's Law?
a)
pressure & volume
b)
volume & temperature
c)
temperature & pressure
d)
volume & moles (amount of gas)
9.

Which of these phase changes does NOT involve changing a liquid into a gas?

a)

Sublimation

b)

Vaporization

c)

Evaporation

d)

Boiling

10.

The number of neutrons in an atom equals the

a)

Mass number minus atomic number

b)

Atomic number plus number of electrons

c)

Mass number plus atomic number

d)

Atomic number minus mass number

11.
What subatomic particles are located in the electron cloud?
a)
quarks
b)
protons
c)
electrons
d)
neutrons
12.
What are subatomic particles? 
a)
the nucleus 
b)
electron cloud
c)
positive charge
d)
electrons, protons, and neutrons
13.

an arrangement of the elements according to their atomic numbers so that elements with similar properties are in the same column and properties repeat from row to row

a)

Periodic Table of Elements

b)

Atomic Theory

c)

Isotopes

d)

Subatomic Particles

14.

the mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

15.

the basic structural unit of matter

a)

atom

b)

matter

c)

element

d)

nucleus

16.

Cations are metals that form ____________ ions and __________ electrons.

a)

positive, neither

b)

negative, gain

c)

neutral , gain

d)

positive, lose

17.
Anions are _______ that form ____________ ions and __________ electrons.
a)
nonmetals, positive, lose
b)
nonmetals, negative, gain
c)
metals, positive, gain
d)
metals, positive, lose
18.
How do covalent bonds form?
a)
Donating & receiving valence e- between atoms.
b)
Opposite slight charges attract each other between compounds.
c)
Scientists are still not sure how they form.
d)
Sharing valence e- between atoms.
19.
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 
a)
catalyst
b)
product
c)
reactant
d)
solute
20.

In an endothermic reaction, energy is _________.

a)

absorbed

b)

released

21.

The substances listed on the left side of a chemical equation are the _______ (they start the reaction) and the substances on the right side of the equation are the __________.

a)

Products, Reactants

b)

Coefficients, Subscripts

c)

Precipitates, Coleman

d)

Reactants, Products.

22.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
23.
Which has a pH above 7?
a)
Acid
b)
Base
24.
Which has a pH below 7?
a)
Acid
b)
Base
25.
A variable whose value changes as a result of changes to other variables is a(n)
a)
independent variable.
b)
dependent variable.
c)
constant.
d)
control.
26.
It represents an idea, event, or object to help people observe or test it to better understand 
a)
variable
b)
model
c)
bias
d)
theory
27.

what is the biggest group on the table

a)

metals

b)

nonmetals

c)

metaloids

d)

halogens

28.

how many rows are on the table

a)

4

b)

5

c)

6

d)

7

29.

how many groups/families are on the table

a)

15

b)

16

c)

17

d)

18

30.

When an ionic bond is formed, electrons are _____.

a)

gained

b)

lost

c)

shared

d)

gained or lost

31.
If a spoonful of sugar is mixed in a glass of water, what is the water called? 
a)
solute
b)
solution
c)
solvent
d)
element 
32.

A combination of two or more substances that can be physically separated is called a...

a)

Mixture

b)

Pure substance

c)

Compound

33.

Coffee, mouthwash, and vinegar are examples of __________________ mixtures.

a)

heterogeneous

b)

homogeneous

c)

pure

34.

The part of the solution that is being dissolved

a)

solute

b)

solvent

c)

solubility

d)

miscible

35.

A ______________ mixture is one that does not have a uniform composition.

a)

heterogeneous

b)

homogenous

c)

pure substance

36.

What is a valence electron?

a)

Electrons in the first energy shell

b)

Electrons in the second energy shell

c)

Electrons in the outer shell

d)

Total number of electrons

37.

What charge do protons have?

a)

Positive

b)

Negative

c)

Neutral

38.

What is atomic number ?

a)

Number of Protons

b)

Number of Electrons

c)

Number of Protons and Electrons

d)

Number of Protons and Neutrons

39.

What is Atomic Mass Number ?

a)

Number of Protons

b)

Number of Neutrons

c)

Number of Protons and Neutrons

d)

Number of Protons and Electrons

40.
Substance that cannot be broken into simpler substances
a)
element
b)
molecule
c)
gram
d)
proton
41.
Number placed in front of a chemical formula
a)
product
b)
coefficient
c)
reactant
d)
subscript
42.
Number written below & to the right of a chemical symbol
a)
subscript
b)
reactant
c)
product
d)
coefficient
43.
Highly reactive metals in first column of periodic table
a)
halogens
b)
noble gases
c)
alkali metals
d)
metalloids
44.
Electrons in the outermost orbit or shell
a)
quarks
b)
molecules
c)
valence
d)
compounds
45.
How many iron atoms are in 
Fe(NO3)2
a)
1
b)
2
c)
3
d)
6
46.
A 55-gram egg is placed in a pot. After the egg is boiled, which is most likely the mass of the egg?
a)
50 
b)
55 
47.

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B have?

a)

4g

b)

5g

c)

9g

d)

14g

48.

Why does this picture demonstrate the Law of Conservation of Mass?

a)

the number of atoms of each element are the same on both sides

b)

they start out separate and end up combined

c)

the same elements are used

d)

it doesn't demonstrate the Law of Conservation of Mass

49.

When a log is burned, what happens to the wood?

a)

The mass stays the same, but becomes smoke and ash.

b)

It disappears.

c)

The mass changes as it goes away.

d)

Nothing. You're imagining things.

50.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
51.
Which of these is not a chemical reaction?
a)
Burning of wood
b)
Milk going bad
c)
Mixing vinegar and baking soda
d)
Melting of ice
52.
What is the Law of Conservation of mass?
a)
Mass is created in a chemical reaction
b)
Mass is created in a physical change
c)
New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
d)
Mass is never created or destroyed
53.

How many atoms do you have in the compound 2MgCl2?

a)

2 atoms

b)

4 atoms

c)

6 atoms

d)

8 atoms

54.

Physical change in matter from a gas to a liquid

a)

Condensation

b)

Freezing point

c)

Melting point

d)

Evaporation

55.
The freezing and melting points of water are the same.
a)
True
b)
False
56.

Absorbing heat from the surroundings is an ___________________ reaction

a)

Exothermic

b)

Endothermic

c)

Kinetic Energy

d)

Thermal Energy

57.

Releasing heat into the surrounding is an ___________________ reaction

a)

Exothermic

b)

Endothermic

c)

Kinetic Energy

d)

Thermal Energy

58.

The rate of a chemical reaction is NOT affected by which of the following:

a)

temperature (high go faster and low goes slower)

b)

concentration

c)

particle size (surface area)

d)

All of these affect reaction rates

59.

Where are coefficients placed to balance a chemical equation?

a)

Behind first element

b)

In front of last element

c)

In front of element that needs the change

d)

Behind the element that needs the change

60.

What are the phases of matter?

a)

Solid and Liquids

b)

Liquids and Gases

c)

Solids, liquids and gas

d)

Solid, liquid, gas and plasma

61.

Which are chemical properties?

a)

Change in size, shape, color, temperature and state of matter.

b)

Formation of a precipitate only

c)

Formation of a precipitate, odor, loud noise, heat and light and gas.

d)

Formation of color, temperature and odor only.

62.

Which of the following are physical properties

a)

Color change, temperature change, and odor production

b)

Change in size, shape, state, color, and temperature

c)

Formation of a precipitate, loud noise, light, heat and odor

d)

Change in size, color and temperature only

63.
A physical change occurs when a substance _____. 
a)
breaks into individual elements
b)
becomes a new substance
c)
changes from an acid to a base
d)
changes shape, size, and form
64.

Which occurs when atoms link together in news ways to create a substance different from the original substances?

a)

A physical change

b)

A nuclear reaction

c)

a chemical change

d)

an inversion

65.

Which form of matter has a definite shape and takes up space (has definite volume)?

a)

liquid

b)

solid

c)

gas

d)

clay

66.
Definite volume but not definite shape
a)
solid
b)
liquid
c)
gas
d)
solid, liquid and gas
67.

Particles move quickest in ________.

a)
solid
b)
liquid
c)
gas
d)
solid, liquid and gas
68.

Who is glad that our chemistry unit is over?

a)

Mrs. Pasdach

b)

Me

c)

Everyone!!!!!!

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