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MIDTERM AdGE

Total questions: 121

Worksheet time: 3hrs 1mins

Name
Class
Date
1.
A series of steps used by scientists to solve a problem or answer a question. 
a)
scientific method
b)
recipe
c)
data collection
d)
metric system
2.
A testable explanation to a problem that has not yet been tested. 
a)
data
b)
theory
c)
hypothesis
d)
fact
3.
Testing a hypothesis often involves a(n):
a)
answer
b)
experiment
c)
problem
d)
safety check
4.
The summary at the end of an experiment that explains the results. 
a)
conclusion
b)
procedures
c)
materials
d)
responding variable
5.
The name of the information that you get from your experiment (you organize it into charts and graphs).
a)
observations
conclusion
b)
data
c)
variables
d)
hypothesis
6.
If you increase the amount of spinach you eat, then you will increase the iron in your blood. 
What's the dependent variable?
a)
increase the amount of iron in your blood
b)
spinach you eat
7.
If I ride my bike to school instead of walking, then I will get to school faster. What is the dependent variable?
a)
True
b)
How fast you get to school
c)
Riding a bike or walking
d)
False
8.
Will a construction paper air plane fly faster than an airplane made from notebook paper? Choose the best hypothesis.
a)
If I make a paper airplane from notebook paper, then it will fly faster than construction paper.
b)
Yes.
c)
No.
d)
I think the construction paper air plane will fly faster.
9.
If I listen to Mr. Castro's instructions, then I will have less accidents in the lab. What is the independent variable?
a)
Yes
b)
Maybe
c)
Listening or not listening to instructions
d)
Likelihood of having an accident in lab 
10.
Which of the following would be considered quantitative data?
a)
Color
b)
Smell
c)
6.84 cm
d)
texture
11.
Explaining the color of a chemical would be what kind of observation?
a)
Qualitative 
b)
Quanitative
12.
What is the part of the experiment that is left alone or “natural", and is used to compare back to?
a)
Independent Variable
b)
Dependent Variable
c)
Control Group
d)
Experimental Group 
13.

What step does every scientific experiment begin with?

a)

hypothesis

b)

question/problem

c)

background research

d)

conclusion

14.

Which of these contains the steps of the scientific method in the correct order?

a)

Ask a question, do background research, state your hypothesis, conduct an experiment, analyze data, make a conclusion

b)

State your hypothesis, ask a question, do background research, conduct an experiment, analyze data, make a conclusion

c)

Ask a question, state your hypothesis, do background research, conduct an experiment, make a conclusion, analyze data

d)

State your hypothesis, ask a question, do background research, make a conclusion, conduct an experiment, analyze data

15.

The __________________________________ is the organized way scientists answer questions and solve problems.

a)

scientific method

b)

scientific explanation

c)

scientific notation

d)

scientific guesses

16.
Another word for prediction or educated guess is: ________________
a)
hypothesis
b)
conclusion
c)
experiment
d)
data
17.
The information you record in an experiment is called your ____________.
a)
data
b)
conclusions
c)
notebook
d)
inquiry
18.
How many sig figs are there?
9009.00
a)
2
b)
4
c)
5
d)
6
19.
How many sig figs are there?
0.00400
a)
1
b)
3
c)
5
d)
6
20.
How many sig figs are there?
4004
a)
1
b)
2
c)
3
d)
4
21.
All of the following have one significant figure except:
a)
100 cm
b)
0.0001 cm
c)
2 cm
d)
2.00 cm
22.

When using scientific notation, a positive exponent means ...

a)

the standard number is greater than one

b)

the standard number is less than one

c)

the negative sign doesn't have a meaning

d)

None of the above

23.

Which value is the greatest

a)

5.0 x 10-9

b)

5.0 x 10-4

c)

5.0 x 106

d)

5.0 x 108

24.

Which number is the least in value

a)

5.0 x 10-9

b)

5.0 x 10-4

c)

5.0 x 106

d)

5.0 x 108

25.
What is scientific notation?
a)
A long way to write really short  numbers
b)
A short way to write really long numbers
c)
I don't know...
d)
None of the above
26.

When gasoline and polystyrene mix together what product is produced?

a)

nothing

b)

a glue

c)

an unknown product

d)

unexpanded polystyrene

27.

The dimensions of rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as

a)

4.128 cm3.

b)

4.12 cm3.

c)

4.13 cm3.

d)

4.1 cm3.

28.
Calculate 923 g ÷ 20312 cm3 and give your answer with the correct number of significant figures.
a)
0.04 g/cm3
b)
0.045 g/cm3
c)
0.0454 g/cm3
d)
0.05 g/cm3
29.
Calculate 1.23 m x 0.89 m and give your answer with the correct number of significant figures.
a)
1.0 m2
b)
1.1 m2
c)
1.0947 m2
d)
1.095 m2
30.
Calculate 7.987 m - 0.54 m and give your answer with the correct number of significant figures.
a)
7.45 m
b)
7.447 m
c)
7.4 m
d)
7.5 m
31.
Calculate 12.47 m ÷ 3.2 s and give your answer with the correct number of significant figures.
a)
4 m/s
b)
3.9 m/s
c)
3.90 m/s
d)
3.897 m/s
32.

Convert this number into scientific notation: 0.068

a)

6.9 x 106

b)

6.8 x 10-9

c)

6.8 x 10-2

d)

None of the above

33.

Convert this number into scientific notation: 950,000

a)

9.5 x 105

b)

9.5 x 10-9

c)

9.5 x 102

d)

None of the above

34.
(2.8 * 108) (2.2*103)
a)
6.16 * 1024
b)
5.0 * 1011
c)
6.16 * 1011
d)
61.6 * 1011
35.
(8.4 * 106)/(2.1 * 103)
a)
0.4 * 104
b)
400 * 10-3
c)
4 * 103
d)
4 * 102
36.
(2 x 109)(4 x 10-4)
a)
8 x 1013
b)
8 x 1036
c)
8 x 105
d)
8 x 10-36
37.
5 x 1012
------------
2 x 106
a)
2.5 x 102
b)
2.5 x 106
c)
3 x 102
d)
2.5 x 1018
38.
How many significant figures will be in the answer to the following question:
7.62 x 6.98 x 3.2645
a)
1
b)
2
c)
3
d)
4
39.
Calculate 12.34 + 1.234 + 0.1234
a)
13.6974
b)
13.697
c)
13.70
d)
13.7
40.
Calculate 345.009 g - 23.009 g and give your answer with the appropriate number of significant figures.
a)
322.00 g
b)
322 g
c)
322.000 g
d)
322
41.

7.8 x 5.501

a)

42.9078

b)

42.908

c)

42.91

d)

42.9

e)

42

42.

What is 78.5 rounded to one significant figure?

a)

79

b)

78.5

c)

70

d)

80

43.

Samples with masses of 0.12 g, 1.8 g, and 0.562 g are mixed together. The combined mass of the three samples, expressed to the correct number of significant figures, should be recorded as

a)

2.4 g.

b)

2.48 g.

c)

2.482 g.

d)

2.5 g.

44.

How many different atoms

are there in a compound?

a)

0

b)

1

c)

2 or more

d)

-1

45.

Which of the following does not describe elements?

a)

All particles are alike

b)

Can be broken down into simpler substances

c)

Have unique sets of properties

d)

Join together to form compounds

46.

Which of the following best describes chicken noodle soup

a)

element

b)

compound

c)

mixture

d)

solution

47.

What is the chemical formula for water?

a)

NaCl

b)

CO2

c)

NH3

d)

H2O

48.

Example of a homogeneous mixture

a)

sweet tea

b)

pizza

c)

guacamole

d)

helium

49.

What is a mixture?

a)

an atom

b)

2 or more substances that are together in the same place, but their atoms are not chemically bonded

c)

a substance that cannot be broken down into any other substances by physical or chemical means

d)

A substance made of 2 or more elements that are chemically

combined in a set ratio

50.

The smallest unit of an element that has all the basic properties of the element is called what?

a)

compound

b)

mixture

c)

element

d)

atom

51.

Which of the following substances can be separated into simpler substances only by chemical means: sodium, salt water, water, gold

a)

sodium

b)

salt water

c)

water

d)

gold

52.

What is the atomic number?

a)

8

b)

15.999

c)

16

d)

?

53.

How would you separate sand and water?

a)

boil

b)

filter

c)

magnetic

d)

put it in the fridge

54.
What is H2SO4 
 made up of?
a)
2 hydrogen, 1 sulfur, 4 oxygen
b)
1 hydrogen, 2 sulfur, 4 oxygen
c)
2 hydrogen & 4 sodium
d)
1 hydrogen & 6 sodium
55.
A mixture that appears to be evenly mixed throughout:
a)
an atom
b)
a compound
c)
a homogeneous mixture
d)
a heterogeneous mixture
56.
You are eating a pizza. What type of mixture are you consuming?
a)
homogeneous
b)
heterogeneous
c)
pure substance
d)
The Periodic Table
57.

Is Plastic a Solid, Liquid, Gas, or Plasma?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

58.

Is Coke a Solid, Liquid, Gas, or Plasma?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

59.

Is Air a Solid, Liquid, Gas, or Plasma?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

60.

Is Lightning a Solid, Liquid, Gas, or Plasma?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

61.

Is the Helium in Balloons a Solid, Liquid, Gas, or Plasma?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

62.

Concentration is

a)

the amount of solute in the solvent

b)

the amount of solvent in the solute

c)

density

d)

particle size

63.

Which solution is more concentrated?

Solution 1:

500 mL of water

100 g of salt


Solution 2:

500 mL of water

90 g of salt

a)

Solution 1

b)

Solution 2

c)

They have the same concentration

d)

I have no idea

64.

In order to dilute a solution, you need to

a)

add more of the solid

b)

add more water

c)

find the mass

d)

find the volume

65.

Which solution is more diluted?

Solution 1:

1000 mL of water

60g of salt


Solution 2:

500 mL of water

60 g of salt

a)

Not enough information to tell

b)

Solution 1

c)

Solution 2

d)

They are equally diluted

66.

When an object SINKS in a liquid, it is because the object is ______ than the liquid.

a)

More Dense

b)

Less Dense

67.

Both solutions have equal volumes of 30 mL. Which solution is more diluted?

a)

Solution X

b)

Solution Y

68.
Solvent is best defined as-
a)
a mixture in which the substances are spread out evenly between one another and cannot be told apart
b)
the ability of a substance to dissolve in another substance
c)
a substance that dissolves in another substance
d)
a substance into which another substance dissolves
69.
What is a solute?
a)
The substance that does the dissolving in a solution.
b)
The substance that is dissolved into the solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
70.
A solution that can hold more solute  is called
a)
saturated
b)
supersaturated
c)
unsaturated
d)
insoluble
71.

When no more solute dissolves the solution is _________

a)

supersaturated

b)

unsaturated

c)

saturated

d)

supercalifragilisticexpialidocious

72.

The substance being dissolved is called the ________

a)

solvent

b)

solid

c)

solute

d)

solvate

73.
A solution that has more solute than it can hold is called
a)
saturated
b)
supersaturated
c)
unsaturated 
d)
suspension
74.
Which technique could increase or speed up the rate of dissolving?
a)
Allowing the mixture to settle
b)
Stirring the mixture
c)
Adding more powder
d)
Adding more water
75.
What does it mean to dilute a solution?
a)
lower the concentration of solute per solvent
b)
increase the concentration of solute per solvent
76.
How does a solution become supersaturated?
a)
dissolve lots of solute in it.
b)
dissolve a little solute in it. 
c)
dissolve more solute than you should be able to. 
d)
dissolve a super amount of solvent in it. 
77.
When a solution is very concentrated, it has a high amount of _________ to _________.
a)
solute to solvent
b)
solvent to solute
c)
solvent to solution
d)
solution to solute
78.

Acids have a .... (choose more than ONE answer)

a)

bitter taste

b)

sour taste

c)

ph lower than 7

d)

ph higher than 7

79.
Which example best describes a physical change?
a)
iron rusting
b)
charcoal burning
c)
an ice cube melting
d)
a marshmallow burning
80.

Bases are.... (choose more than ONE answer)

a)

sour

b)

bitter

c)

neutral

d)

slippery

81.

With what do you neutralize an acid?

a)

Acid

b)

Base

c)

Water

d)

Salt

82.

Acid + Base =

a)

Water + hydrogen

b)

hydrogen + salt

c)

salt + water

d)

water + salt + hydrogen

83.

Which of the following is an example of an acid?

a)

Lemon Juice

b)

Baking Soda

c)

Oven Cleaner

d)

Dish Soap

84.

Which of the following is an example of a base?

a)

Lemon Juice

b)

Apples

c)

Baking Soda

d)

Vinegar

85.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
86.

With what letter do acids start when writing formulas?

a)

A

b)

T

c)

L

d)

H

87.
Is bleaching your hair a physical or chemical change?
a)
physical
b)
chemical
88.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
89.
What is the name of the following acid: HCl
a)
hydrochloric acid
b)
chloric acid
c)
perchloric acid
d)
chlorous acid
90.
Which of the following is NOT an example of chemical change?
a)
sour milk
b)
burning wood
c)
breaking a pencil
d)
rust
91.
What is the name of the following: NaOH
a)
sodium hydroxide
b)
sodium oxide hydrogen
c)
hydrosodium acid
d)
sodium hydrogen oxide
92.
What is the name of the following acid: H2SO4
a)
hydrosulfuric acid
b)
sulfuric acid
c)
sulfurous acid
d)
persulfuric acid
93.

Why is toothpaste alkaline?

a)

It can neutralise strong alkaline in

your mouth

b)

It can neutralise acid in

your mouth

c)

It can refresh your teeth

d)

Toothpaste is not alkaline.

94.

... are used to neutralise acid in the stomach.

a)

Toothpastes

b)

Bacterias

c)

Antacids

d)

More strong acids

95.

Which one of the following is not a neutral substance ?

a)

Glucose

b)

Sodium Hydroxide

c)

Urea

d)

Sugar

96.
What is liquid volume measured in? 
a)
kilograms and grams
b)
liters and milliliters
c)
liters and grams
d)
mililiters and kilograms
97.
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
98.
If an acid is combined with a base of equal strength, the result will most likely be
a)
a neutral solution.
b)
a stronger acid.
c)
impossible to tell without testing the pH.
d)
a stronger base
99.
How many inches is the green rectangle?
a)
3 inches
b)
4 inches
c)
5 inches
d)
6 inches
100.
How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution?
a)
1.074 mol
b)
62.7 mol
c)
1.07 mol
d)
62.7 grams
101.

What is the percent by mass of a sugar solution where 10 grams of sugar is added to 100 grams of water?

a)

.10%

b)

0.091%

c)

9.1%

102.
What is the concentration, in percent by volume, of 15.3 mL of solute in 2.65 L of solution?
a)
0.58%
b)
0.0058%
c)
5.8%
103.
What is the molarity of a solution which contains 22.41 grams of NaCl in 50.0 mL of solution?
a)
0.488 M
b)
7.66 M
c)
7.67 M
d)
0.00767 M
104.

Find the concentration of 186.55 g of sugar (C12H22O11) in 250. mL of water.

a)

2.18 molL-1

b)

2.17 molL-1

c)

1.18 molL-1

d)

.00218 molL-1

105.
How many moles of solute are contained in 3.0 L of a 1.5 M solution?
a)
4.5 moles
b)
1.5 moles
c)
2.0 moles
d)
0.5 moles
106.
What mass of solute is needed to make 75.0 g of a 3.4% solution?
a)
2.55 g
b)
22 g
c)
0.05 g
107.
Brass is a copper-zinc alloy. If the concentration of zinc is relatively low, the brass has a golden color and is often used for inexpensive jewellery. If a 35.0 g pendant contains 1.7 g of zinc, what is the percentage mass by mass of zinc in brass?
a)
2.3
b)
10.1
c)
7.6
d)
4.9
108.
What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250. mL?
a)
15.9 M
b)
0.636 M
c)
0.642 M
d)
1.59 M
109.
How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (MM = 58.45)?
a)
0.625 g NaCl
b)
625 g NaCl
c)
36.5 g NaCl
d)
0.04 mol NaCl
110.
How many grams of AgNO3 (MM = 169.87) are needed to prepare 0.125M solution in 250 mL of water? 
a)
.03g
b)
0.5g
c)
5.3g
d)
84.9g
111.
What is the molar mass of CO2?
a)
12
b)
16
c)
32
d)
44
112.
If you have a solution that is very acidic with a pH of 3.5, what can you do to raise the pH? 
a)
add more acid
b)
add more water
c)
increase the temperature
d)
add a base
113.

Calculate the molar mass of Ba(C2H3O2)2

a)

255.3 g/mol

b)

237.3 g/mol

c)

228.3 g/mol

d)

196.3 g/mol

114.

Calculate the molar mass of NH4NO2

a)

50 g/mol

b)

60 g/mol

c)

64 g/mol

d)

78 g/mol

115.
How many moles are present in 32.3 grams of carbon dioxide (CO2)?
a)
44.01 moles
b)
1421.52 moles
c)
32.3 moles
d)
0.73 moles
116.
What is the mass in grams of 5.90 mol C8H18?
a)
.0512 g
b)
19.4 g
c)
673 g
d)
389 g
117.
How many atoms of Carbon are in one molecule of table sugar (C12H22O11) ?
a)
12
b)
22
c)
11
d)
1
118.

Convert

 100oC100^oC  to Kelvin

a)

 373 K373\ K  

b)

 273 K273\ K  

c)

 212 K212\ K  

d)

 0 K0\ K  

119.

Convert a - 194 Degrees Celsius to Degrees Fahrenheit:

a)

- 317.2 oF

b)

338.5 K

c)

- 273 oC

d)

0 oF

120.

Convert 0°C into °F.

a)

7.2°C

b)

32°C

c)

32°F

d)

212°F

121.

Convert 89°F into °C.

a)

7.2°C

b)

32°C

c)

32°F

d)

212°F

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