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Physical Science Semester Test Dec 2023

Total questions: 50

Worksheet time: 57mins

Name
Class
Date
1.
I believe the number of lemons produced by a lemon tree increases when the tree receives more water.
This statement is 
a)
A hypothesis
b)
A law
c)
A variable
d)
A conclusion
2.
The variable the is changed on purpose is..
a)
Constant
b)
Control
c)
Independent Variable
d)
Dependent Variable
3.

After performing a lab investigation using chemicals, what should you do before you leave the classroom? (select all that apply)

a)

Clean up your lab area

b)

Pour excess chemicals down the drain

c)

Wash your hands

d)

Store all equipment in the correct locations

e)

Take a victory lap around the room

4.
an accessory that protects eyes from chemical or biological splatters and spills
a)
eye wash
b)
protective gloves
c)
goggles
d)
emergency
5.
an instrument that uses a lens to make tiny things look larger
a)
goggles
b)
eye wash
c)
microscope
d)
triple beam balance
6.

Type of mixture that has the SAME COMPOSITION in every part.

a)

Homogenous

b)

Heterogeneous

7.
Kool-Aid - Powder, sugar, and water
Identify the solvent 
a)
water
b)
powder
c)
sugar
d)
powder and sugar
8.

Combination of two or more pure substances that are not chemically combined

a)

grass

b)
atom
c)

mixture 

d)
element
9.

a characteristic of matter you observe as it reacts or changes into a different substance

a)

physical property

b)

chemical property

c)

periodic table

d)

conglomerate

10.
Solids __________.
a)
take the shape of their container
b)
have a fixed shape
c)
are compressible
d)
have particles that flow easily
11.

What state of matter has no shape and no size?

a)

gas

b)

liquid

c)

solid

12.

What state of matter can move and flow easily?

a)

liquids

b)

solids

c)

gases

13.

What is the definition of SUBLIMATION?

a)

When solid rock melts to form lava

b)

When water vapor cools down to form liquid water

c)

The transition of a substance from a solid directly to a gas

14.

This is an example of

a)

Freezing

b)

Melting

c)

Condensation

d)

Sublimation

15.

All matter is made of _________.

a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
16.
The positively charged particles of an atom are the ________.
a)
electrons
b)
protons
c)
neutrons
d)
protons & neutrons
17.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
18.

__________ are negatively charged particles that are in the orbitals around the nucleus.

a)

protons

b)

nucleus

c)

neutrons

d)

electrons

19.
The particles with no charge in an atom are the _______.
a)
electrons
b)
neutrons
c)
protons
d)
protons and neutrons
20.

The chemical symbol for an element is always represented by only 1 letter

a)

True

b)

False

21.

The first letter of the chemical symbol is always a capital letter and the second is always lowercase

a)

True

b)

False

22.

Atomic Mass equals the combined number of

a)

Protons and Electrons

b)

Electrons and Neutrons

c)

Protons and Neutrons

23.

What is the chart called that organizes all of the elements found on Earth?

a)

Element Chart

b)

Table of Elements

c)

Periodic Table of Elements

24.

A row on the Periodic Table of Elements

a)

family

b)

period

c)

row

d)

isotope

25.

How many elements are there?

a)

100

b)

110

c)

115

d)

118

26.

All Elements are either _________________, _____________________, ____________________. (select all that apply)

a)

Metals

b)

Non-metals

c)

liquids

d)

metalloids

e)

rocks

27.

What Russian Scientist first constructed the Periodic Table?

a)

Victor Hugo

b)

Andrei Kirilenko

c)

Albert Einstein

d)

Dimitri Mendeleev

28.

What is the atomic number for this element?

a)

32.065

b)

16

c)

48.065

29.

What is the atomic mass of Sulfur?

a)

16

b)

32.065

c)

48.065

30.
Why do elements bond?
a)
To be friends
b)
To create a new element
c)
To become stable
31.
How are covalent bonds formed?
a)
Sharing of electrons
b)
Transfer of electrons
32.

Same charges repel, opposites charges ______

a)
avoid
b)
attract
c)
push
d)
pull
33.
What is a valence electron?
a)
The sum of neutrons and protons.
b)
The # of electrons in the last shell.
c)
A type of bond.
d)
A popular compound.
34.
Where are metals located on the periodic table?
a)
Blue
b)
Green
c)
Red
35.

Alloys are created to improve the working properties and appearance of metals, they are made by cobining two or more elements.

a)

True

b)

False

36.
Anything that has mass & takes up space
a)
gravity
b)
force
c)
matter
d)
volume
37.
Substance that cannot be broken into simpler substances
a)
element
b)
molecule
c)
gram
d)
proton
38.

What is the big number placed in front of a element called?

a)
product
b)
coefficient
c)
reactant
d)
subscript
39.

Number written below & to the right of a chemical symbol (not suppose to change ever)

a)
subscript
b)
reactant
c)
product
d)
coefficient
40.

Substances that form as the result (at the end) of a chemical reaction

a)
products
b)
reactants
c)
coefficients
d)
subscripts
41.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
42.
Is this equation balanced or unbalanced? 
H2 + O2 --> H2O
a)
balanced
b)
unbalanced
43.

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

44.
What type of chemical reaction is this?
Al(OH)3 → Al2O3  + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement 
45.
4Si   + S8   -->   2Si2S4
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
46.
Exothermic reactions release heat to the surroundings.
a)

true

b)

false

47.

What is the rate of reaction?

a)

How much energy is needed for a reaction to occur.

b)

The energy required to break a bond.

c)

The time it takes for a reaction to occur.

d)

Collision Theory

48.

What factors effect rate of reaction?

a)

Temperature, Concentration, Pressure and Energy

b)

Surface Area, Concentration, Energy and Pressure

c)

Temperature, Pressure, Concentration and Surface area

d)

Pressure, Surface area, Density and Energy

49.

Increasing the temperature of your solution will.......

a)

Not affect the rate of reaction.

b)

Speed up the rate of reaction

c)

Slow down the rate of reaction

50.
Grinding a seltzer tablet into powder increases the rate of reaction due to increased
a)

concentration

b)

surface area

c)

temperature

d)

reactants

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