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Chemistry NGSS Semester 1 Final Revu

Total questions: 66

Worksheet time: 2hrs 35mins

Name
Class
Date
1.

Convection currents happen when

a)

Rock/magma gets heated and sinks. It then cools down and rises.

b)

Rock/magma doesn't move.

c)

Rock/magma gets more dense and rises. It then cools down and sinks.

d)

Rock/magma gets heated and rises. It then cools down and sinks.

2.
What are the puzzle pieces of the Earth's surface called?
a)
Tectonic plates
b)
Puzzles
c)
Earthquakes
3.
This layer of the Earth is found between the core and the crust.
a)
mantle
b)
outer core
c)
inner core
d)
crust
4.

What is potential energy?

a)

moving energy

b)

stored energy

c)

renewable energy

d)

non renewable energy

5.

Which of these is an example of kinetic energy?

a)

a bicycle

b)

a battery

c)

a solar panel

d)

firewood

6.
The process by which energy is transferred from a warmer object to a cooler object by means of physical contact
a)
Thermal Energy
b)
Convection
c)
Radiation
d)
Conduction
7.
Energy that travels across distances in the form of electromagnetic waves. 
a)
Convection
b)
Radiation
c)
Conduction
d)
Induction
8.
What happens to particles as they heat up?
a)
They slow down
b)
Nothing
c)
They don't move
d)
They speed up
9.
Which example below is an example of conduction?
a)
Boiling macaroni
b)
The attic is warmer than the basement
c)
The Sun heating the Earth
d)
Touching hot sand with your feet
10.
Which example below is an example of radiation?
a)
Standing on a hot metal bridge
b)
The attic is warmer than the basement
c)
The Sun heating the Earth
d)
Touching hot sand with your feet
11.

When rain freezes and turns to ice or sleet, this is an example of a

a)

physical property

b)

chemical property

c)

physical change

d)

chemical change

12.

Two substances are combined. Gas is released, and a tall, black column forms. This is an example of a

a)

physical property

b)

chemical property

c)

physical change

d)

chemical change

13.

Which answer below is an example of two physical properties of matter?

a)

weight and toxicity

b)

mass and reactivity

c)

mass and volume

d)

mass and pH

14.

A mixture

a)

is made of a single substance.

b)

is made of more than one substance.

c)

always has a fixed composition.

d)

is made of substances that you can always see at all times.

15.

Students were studying different liquid samples. Which of these is most likely a pure substance?

a)

Liquid A was heated and evaporated completely. Nothing was left behind in the beaker.

b)

An acid was mixed with Liquid B, and bubbles formed.

c)

Once Liquid C cooled, a precipitate formed.

d)

The density of Liquid D is 2.3 g/mL.

16.

If a salad dressing with water and vinegar looks the SAME throughout (has a consistent color and texture), it would be an example of a

a)

heterogeneous mixture

b)

pure substance

c)

compound

d)

homogeneous mixture

17.

When salt dissolves in water, it is an example of a

a)

heterogeneous mixture

b)

chemical reaction

c)

homogeneous mixture

d)

chemical change

18.
Identify the product when hydrocarbons are burned in excess oxygen
a)
Carbon
b)
Carbon monoxide + Water
c)
Carbon dioxide
d)
Water + Carbon dioxide
19.

The initial energy required to start a chemical reaction is called

a)

Potential Energy

b)

Kinetic Energy

c)

Chemical Potential Energy

d)

Activation Energy

20.
All combustion reactions are 
a)
endothermic
b)
exothermic
c)
neutral
d)
fast
21.
Heat flows from _______ to ______ objects
a)
cooler to warmer
b)
warmer to warmer
c)
warmer to cooler
d)
cooler to cooler
22.

A chemical reaction that absorbs heat from the surroundings is said to be __________ and has a __________ ΔH at constant pressure.

a)

endothermic; positive

b)

endothermic; negative

c)

exothermic; negative

d)

exothermic; positive

23.

The amount of heat energy required to change the temperature of 12 g of gold from 45°C to 15°C is -47 J. What is the specific heat capacity of gold?

a)

0.13 J/(g°C)

b)

17,000 J/(g°C)

c)

1600 J/(g°C)

d)

0.065 J/(g°C)

24.

The graph represents the uniform heating of a substance, starting with the substance as a solid below its melting point. Which line segment listed below represents an increase in potential energy and no change in average kinetic energy?

a)

Line segment AB

b)

Line segment BC

c)

Line segment CD

d)

Line segment EF

25.
Why does food wrapped in aluminum foil keep warm for a long time?
a)
Aluminum foil is an insulator and prevents heat loss by conduction.
b)
Aluminum foil forms an air-tight seal and prevents heat loss by convection.
c)
The silver surface of the foil reflects heat in and prevents heat loss by radiation.
d)
The silver surface of the foil absorbs heat from the surroundings and keeps the food warm.
26.
You pick up a can of soda off of the countertop.  The countertop underneath the can feels colder than the rest of the counter.  Which explanation do you think is the best?
a)
The cold has been transferred from the soda to the counter.
b)
There is no heat energy left in the counter beneath the can.
c)
Some heat has been transferred from the counter to the soda.
d)
The heat beneath the can moves away into other parts of the countertop.
27.

Which is the best surface for reflecting heat radiation?

a)

Shiny white

b)

Dull white

c)

Shiny black

d)

Dull black

28.

Which is the best surface for absorbing heat radiation?

a)

Shiny white

b)

Dull white

c)

Shiny black

d)

Dull black

29.

Thermal flasks used to keep drinks warm and double glazed windows contain a vacuum chamber. Why is this?

a)

To keep things clean

b)

To prevent contamination

c)

To reduce thermal energy loss via radiation

d)

To reduce energy loss via conduction and convection

30.

Why does warm fluid rise?

a)

Particles lose energy, they move closer together, density increase

b)

Particles become less dense

c)

Particles gain energy, they move further apart, density decreases

d)

Particles gain energy, and their density decreases

31.
Describes the number of molecules in a compound and is used to balance a chemical reaction. 
a)
coefficient 
b)
subscript
c)
superscript
d)
SI unit
32.
Provides evidence that a chemical reaction has occurred. 
a)
dissolving 
b)
melting
c)
formation of a gas
d)
bending
33.
What are the correct coefficients when this equation is balanced?
KClO3  --> KCl  +  O2
a)
2,2,2
b)
2,2,3
c)
1,2,3
d)
3,3,3
34.

What type of reaction is the following:
 Zn + 2HCl −> ZnCl2+H2Zn\ +\ 2HCl\ ->\ ZnCl_2+H_2 

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

35.

What type of reaction is the following:
 2C4H10 +13O2 −> 8CO2+10H2O2C_4H_{10}\ +13O_2\ ->\ 8CO_2+10H_2O 

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

36.

What type of reaction is the following:
 Ag3N + 3HBr−>3AgBr+H3NAg_3N\ +\ 3HBr->3AgBr+H_3N 

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

37.
Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C6H12O6? 
a)
1 mole = 78.12 g
b)
1 mole = 22.4 L 
c)
1 mol = 6.02x 1023 particles 
d)
more than one
38.
What is the molar mass of Hydrogen Peroxide (H2O2)?
a)
48 g/mole
b)
34.02 g/mole
c)
36.5 g/mole
d)
35.5 g/mole
39.
The number 6.02 x 1023, which is the number of particles found in a mole. 
a)
molar mass
b)
mole
c)
Avogadro's number
d)
hydrate
40.
How many moles are in 16.94g of water?
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
41.
How many molecules of sugar (C6H12O6) are in a mole?
a)
24 molecules
b)
180 molecules
c)
180 g
d)
6.02 x 1023 molecules
42.
Which has more atoms, 12.0 mol of C or 12.0 mol of Ca?
a)
12.0 mol C
b)
12.0 mol Ca
c)
They are equal
43.
What is the molar mass of AuCl3?
a)
96 g
b)
130 g
c)
232.5 g
d)
303.3 g
44.

How many moles are in 15 grams of Lithium?

a)

2.14

b)

0.47

c)

105

d)

7

45.

How many grams are in 2.4 moles of Sulfur?

a)

76.8

b)

0.075

c)

13.3

d)

32

46.
Which of the following is a pure substance?
a)
air
b)
granite
c)
water
d)
stainless steel
47.
Which of these shows SI unit prefixes arranged in order from smallest to largest?
a)
centi, milli, kilo
b)
milli, centi, kilo
c)
kilo, milli, centi
d)
kilo, centi, milli
48.
A sample of bismuth has a mass of 343 g and a volume of 35.0 cm3.What is the density of bismuth?
a)
0.102 g/cm3
b)
9.80 g/cm3
c)
378 g/cm3
d)
1.20 104 g/cm3
49.
An object’s weight is a measure of 
a)
the force with which it is attracted by gravity.
b)
the pressure exerted on a scale.
c)
the amount of material per unit volume.
d)
the force causing the object to move.
50.
The SI base unit for mass is the
a)
gram
b)
cubic centimeter
c)
meter
d)
kilogram
51.
What is the density of an object having a mass of 8.0 g and a volume of 25 cm3?
a)
0.32 g/cm3
b)
3.1 g/cm3
c)
200 g/cm3
d)
2.0 g/cm3
52.
Which group of measurements  is the most precise? (Each group of measurements is for a  different object)
a)
2.0 g, 3.0 g, 4.0 g
b)
1 g, 3 g, 5 g
c)
2 g, 2.5 g, 3 g
d)
2 g, 3 g, 4 g
53.
What is the temperature -34oC expressed in kelvins?
a)
139 K
b)
239 K
c)
339 K
d)
207 K
54.
Which temperature scale has no negative temperatures?
a)
Joule
b)
Fahrenheit
c)
Kelvin
d)
Celsius
55.
If the temperature of a piece of steel decreases, what happens to its density?
a)
The density decreases
b)
Density 1st increase, then decreases
c)
The density increases
d)
The density does not change
56.

Calcium (Ca) is an example of a(n):

a)

Element

b)

Compound

c)

Homogenous Mixture

d)

Heterogeneous Mixture

57.

Methane (CH4) is an example of a(n):

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

58.

Chicken noodle soup is an example of a(n):

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

59.

Which of the following is a physical property?

a)

Heat of combustion

b)

Boiling point

c)

Flammability

d)

Reactivity

60.

Which of the following is NOT a sign that a chemical change has occurred?

a)

Change in color

b)

Change in shape

c)

Formation of a gas

d)

Change in odor

61.

Which of the following is an example of a chemical change?

a)

Ripping paper in half

b)

Boiling an egg

c)

Cracking an egg

d)

Dissolving sugar in water

62.

Which of the following is a physical change?

a)

Burning a match

b)

Vinegar reacting with baking soda

c)

Melting butter

d)

Cooking an egg

63.

Which of the following is a chemical property of water?

a)

Reacts with pure sodium.

b)

Boils at 100 oC.

c)

Dissolves sugar easily.

d)

Has a density of 1 gm/mL

64.

Which of the following is a physical property?

a)

Combustion

b)

Electronegativity

c)

Color

d)

PH Level

65.

Bleaching your hair is an example of a:

a)

physical change.

b)

chemical change.

66.

How would you classify the matter in the picture above?

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

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