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Scientific Method, periodic table of elements, endothermic

Total questions: 95

Worksheet time: 1hrs 24mins

Name
Class
Date
1.
The summary at the end of an experiment that explains the results is... 
a)
conclusion
b)
procedures
c)
materials
d)
responding variable
2.
A testable prediction about a scientific investigation is a(n)
a)
Question
b)
Observation
c)
Hypothesis
d)
Experiment
3.

What is the last step of scientific method?

a)

hypothesis

b)

observe

c)

communicate

d)

question

4.
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
5.

The information you collect while doing your experiment is called

a)

conclusions

b)

data

c)

hypotheses

d)

procedures

6.
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
7.

The variable that is being measured or observed is called the _______________. Hint: this is the variable that is the result or effect

a)

independent variable

b)

dependent variable

c)

control variable

8.
If I study for my scientific method test, then I will have a better test score. What is the dependent variable?
a)
Scientific Method
b)
Studying
c)
Independent variable
d)
Test score
9.

The independent variable is

a)

The variable that you change in an investigation

b)

The variable that you measure in an investigation

c)

A variable that you keep the same in an investigation

10.

The process of obtaining information by using the senses is called a/an

a)

Conclusion

b)

Observation

c)

Inquiry

d)

Scientific method

11.

Data gathered using the senses are referred to ___________.

a)

quantitative data

b)

logical data

c)

measured data

d)

qualitative data

12.

An explanation based on many repeated observations during experiments.

a)

conclusion

b)

scientific law

c)

theory

d)

hypothesis

13.

A general statement that describes a patterns that are often observed in nature.

a)

logical law

b)

civil law

c)

moral law

d)

scientific law

14.

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the dependent variable?

a)

Dropping the same way

b)

Wing Length

c)

Amount of time it takes the helicopter to hit the floor

d)

Dropping from the same height

15.

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the independent variable?

a)

Dropping the same way

b)

Wing Length

c)

Amount of time it takes the helicopter to hit the floor

d)

Dropping from the same height

16.

Cindy wanted to find out how the amount of sunlight affects the growth of plants. She placed two tomato plants in 10 inch pots with potting soil and watered them ¼ cup each day. One plant was placed under a cardboard box and one was placed in the sunlight. She measured the growth of the plant each week for three weeks.

What are two CONSTANTS? (Select 2)

a)

Using the same type of plant

b)

Each plant was placed in a 10 inch pot

c)

The growth of the plant

d)

One plant is in the sunlight and the other is under a box

17.
What would the INDEPENDENT variable be in an experiment testing which  paper airplane design goes furthest?
a)
the paper used
b)
the paper airplane design
c)
the distance of each plane's flight
d)
how hard the plane is thrown
18.

To make observations you use your _______.

a)

Feet

b)

Experience

c)

Senses

d)

Smile

19.

Performing a test or experiment allows you to test your ___________.

a)

Conclusions

b)

Hypothesis

c)

Data

d)

Question

20.

The information you collect while doing your experiment is called

a)

conclusions

b)

data

c)

hypotheses

d)

procedures

21.
What is the chemical symbol for Calcium?
a)
C
b)
Ca
c)
Cal
22.
What is the chemical symbol for Carbon?
a)
C
b)
Ca
c)
Car
23.
What is the chemical symbol for Nitrogen?
a)
N
b)
Ni
c)
No
24.
What is the chemical symbol for Oxygen?
a)
O
b)
Ox
c)
Oy
25.
What is the chemical symbol for Chlorine?
a)
C
b)
Ch
c)
Cl
26.
What is the chemical symbol for Magnesium?
a)
M
b)
Mg
c)
Ma
27.
What is the chemical symbol for Zinc?
a)
Z
b)
Zi
c)
Zn
28.
What is the chemical symbol for Iodine?
a)
I
b)
Io
c)
Id
29.
What is the chemical symbol for Silicon?
a)
S
b)
Si
c)
Sc
30.
What is the chemical symbol for Copper?
a)
C
b)
Co
c)
Cu
31.
What does the chemical symbol Au stand for?
a)
Gold
b)
Silver
32.
What does the chemical symbol Ag stand for?
a)
Gold 
b)
Silver
33.
What is the chemical symbol for Iron?
a)
I
b)
Ir 
c)
Fe 
d)
F
34.
What is the chemical symbol for Aluminum?
a)
A
b)
Al
c)
Au
35.
What does the chemical symbol K stand for?
a)
Krypton
b)
Kryptonite
c)
Potassium
36.
What does the chemical symbol He stand for?
a)
Hydrogen
b)
Helium
37.
What does the chemical symbol Na stand for?
a)
Name of the Elements
b)
Sodium
c)
Neoprene
38.
What is the chemical symbol for Fluorine?
a)
F
b)
Fl 
c)
Fe
39.
What does the chemical symbol H stand for?
a)
Helium
b)
Hydrogen
40.
What does the chemical symbol P stand for?
a)
Phosphate
b)
Phosphorous
41.
What is the chemical symbol for Calcium?
a)
C
b)
Ca
c)
Cal
42.
What is the chemical symbol for Carbon?
a)
C
b)
Ca
c)
Car
43.
What is the chemical symbol for Nitrogen?
a)
N
b)
Ni
c)
No
44.
What is the chemical symbol for Oxygen?
a)
O
b)
Ox
c)
Oy
45.
What is the chemical symbol for Chlorine?
a)
C
b)
Ch
c)
Cl
46.
What is the chemical symbol for Magnesium?
a)
M
b)
Mg
c)
Ma
47.
What is the chemical symbol for Zinc?
a)
Z
b)
Zi
c)
Zn
48.
What is the chemical symbol for Iodine?
a)
I
b)
Io
c)
Id
49.
What is the chemical symbol for Silicon?
a)
S
b)
Si
c)
Sc
50.
What is the chemical symbol for Copper?
a)
C
b)
Co
c)
Cu
51.
What does the chemical symbol Au stand for?
a)
Gold
b)
Silver
52.
What does the chemical symbol Ag stand for?
a)
Gold 
b)
Silver
53.
What is the chemical symbol for Iron?
a)
I
b)
Ir 
c)
Fe 
d)
F
54.
What is the chemical symbol for Aluminum?
a)
A
b)
Al
c)
Au
55.
What does the chemical symbol K stand for?
a)
Krypton
b)
Kryptonite
c)
Potassium
56.
What does the chemical symbol He stand for?
a)
Hydrogen
b)
Helium
57.
What does the chemical symbol Na stand for?
a)
Name of the Elements
b)
Sodium
c)
Neoprene
58.
What is the chemical symbol for Fluorine?
a)
F
b)
Fl 
c)
Fe
59.
What does the chemical symbol H stand for?
a)
Helium
b)
Hydrogen
60.
What does the chemical symbol P stand for?
a)
Phosphate
b)
Phosphorous
61.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
62.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

63.

If a chemical reaction is EXOTHERMIC, the temperature of the surrounding would....

a)

Stay the same

b)

Increase

c)

Decrease

64.

In an endothermic reaction the reaction is releasing energy.

a)

True

b)

False

65.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
66.

The illustration shows cell respiration. Is the overall reaction of cell respiration an Endothermic or an Exothermic reaction?

a)

Endothermic

b)

Exothermic

67.

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

a)

The temperature did not change.

b)

It is an endothermic reaction

c)

It is an exothermic reaction

d)

Energy is released from the reaction into the surrounding.

68.

Baking bread and cooking an egg require an input of heat. These would be examples of....?

a)

Endothermic processes

b)

Exothermic processess

c)

None of these

69.

Photosynthesis takes place inside of leaf cells. Sunlight is required. Is this an Exothermic or an Endothermic reaction?

a)

Endothermic

b)

Exothermic

70.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
71.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

72.
Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?
a)
It is an exothermic reaction
b)
It is an endothermic reaction
c)
It is made of ice
d)
It is dissolving your mouth
73.

What instrument would you use to detect an endothermic or exothermic reaction?

a)

triple beam balance

b)

ruler

c)

thermometer

74.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
bubbles of gas appear
d)
dissolving
75.

During chemical reactions, bonds are...

a)

broken only

b)

formed only

c)

both broken and formed

d)

none of the above are correct

76.

It takes energy to ________________ bonds.

a)

break

b)

form

77.

Energy is released when bonds are _________________.

a)

Broken

b)

Formed

78.

During a particular chemical reaction it takes 100 Kj of energy to break all the bonds and 150 Kj of energy is released when the new bonds form. Which is true about the overall reaction?

a)

It is endothermic and absorbs energy.

b)

It is exothermic and releases 150 Kj

c)

It is exothermic and releases 50 Kj

d)

It is endothermic and releases energy.

79.

The bond energy to break a C-H bond is about 400 Kj. How much energy will it take to break all the bonds in methane (CH4)?

a)

About 800

b)

About 1600

c)

About 3000

d)

Way more than 3000

80.

The bond energy in a S=O bond is a little more than 100 Kj. If the molecule SO2 is made, how much energy is released during the formation of these bonds?

a)

About 50

b)

About 100

c)

About 200

d)

About 400

81.

Which of the following is MOST reactive?

a)

Lithium

b)

Lead

c)

Tin

d)

Copper

82.

Which metal is more reactive than calcium?

a)

magnesium

b)

potassium

c)

silver

d)

aluminum

83.
Which two groups on the Periodic Table are the MOST reactive?
a)
Group 1 and Group 17
b)
Group 2 and Group 16
c)
Group 13 and Group 15
d)
Group 17 and Group 18
84.
How many valence electrons are elements trying to reach in their outer shells?
a)
1
b)
2
c)
5
d)
8
85.
What determines the reactivity of an element?
a)
Size of its nucleus
b)
Number of total electrons
c)
Number of valence electrons
d)
Number of shells
86.
How do you determine the number of valence electrons an element has?
a)
Look at its period
b)
Look at its group
c)
Look at its atomic number
d)
Look at its atomic mass
87.

What are valence electrons?

a)

The total number of electrons in an atom

b)

The number of electrons in the outermost shell

c)

The number of electrons in the second shell

d)

The number of protons in the outermost shell

88.

Which elements have the most similar chemical properties?

a)

boron and carbon

b)

oxygen and sulfur

c)

aluminum and bromine

d)

argon and silicon

89.

 

What element contains 7 protons and 5 valence electrons?

a)

Boron

b)

Vanadium

c)

Nitrogen

d)

Lithium

90.

A student is shown a picture of the atom to the side. What element, based on the subatomic particles in the atom, is shown?

a)

Beryllium

b)

Lithium

c)

Helium

d)

Oxygen

91.

The atomic number of an element is equal to its number of protons. Therefore, a logical conclusion is that the number of protons determines an element’s-

a)

Mass and atomic weight.

b)

The number of stable isotopes.

c)

Identity

d)

State of matter

92.

Compare the data shown in the table. What reasonable conclusion can be made from the information given?

a)

Element 1 has the same atomic mass as Element 4

b)

Element 3 has a very similar chemical properties as Element 4

c)

Element 1 has very similar chemical properties as Element 3

d)

None of the above

93.

Tin, Sn, is a soft white metal. It has a low melting point compared with other metals. Tin is widely used as a coating for cans of food. Which statement accurately describes atoms of tin?

a)

Tin atoms have 50 protons.

b)

Tin atoms have five valence electrons.

c)

Tin atoms have 119 neutrons.

d)

Tin atoms have 68 electrons.

94.

The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?

a)

The element is fluorine, and it is not very reactive.

b)

The element is sodium, and it is not very reactive.

c)

The element is sodium, and it is highly reactive.

d)

The element is fluorine, and it is highly reactive.

95.

Students were asked to identify the location of elements in the periodic table based on clues printed on game cards.

Based on the data, which periodic table shows the correct location of the four elements?

a)
b)
c)
d)

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