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Worksheets

6th CBA Oct 2020 REVIEW

Total questions: 59

Worksheet time: 47mins

Name
Class
Date
1.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
2.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
3.

Which of the following could be a symbol on the periodic table of elements?

a)

JZ

b)

jz

c)

Jz

d)

JZa

4.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
5.
What is made up two or more elements that are chemically combined?
a)
Element
b)
Mixture
c)
Compound
d)
Solids
6.
a)
1
b)
2
c)
3
d)
4
7.
a)
1
b)
2
c)
3
d)
4
8.
How many elements are represented in the compound?
Na2CO3
a)
1
b)
2
c)
3
d)
4
9.
Which of these grouping of elements could have the characteristic of brittle?
a)
Metal
b)
Nonmetal
10.
Some characteristics of a metal are that it is malleable and ductile.
a)
TRUE
b)
FALSE
11.
´Elizabeth was examining elements and their physical properties. She described an element is her science journal as having no shine, an insulator, and  very brittle. What would this element be a metal, nonmetal, or metalloid?
a)
metal 
b)
nonmetal 
c)
metalloid
12.

What is the most abundant element in the atmosphere?

a)

oxygen

b)

hydrogen

c)

nitrogen

d)

helium

13.

Which are the most abundant elements in the lithosphere?

a)

oxygen and calcium

b)

oxygen and hydrogen

c)

oxygen and nitrogen

d)

oxygen and silicon

14.

Which are the two most abundant elements in the atmosphere?

a)

Oxygen and nitrogen

b)

oxygen and hydrogen

c)

oxygen and silicon

d)

oxygen and carbon

15.

Elements and Compounds are pure substances

a)

True

b)

False

16.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
17.
How many elements are in 2O2?
a)
1
b)
2
c)
3
d)
4
18.
Which of the following is classified as an element?
a)
CO
b)
H2O
c)
CO2
d)
H2
19.
John is making a table and needs to label one of the columns. The column contains the following substances: H2O2, CaCl2, and Fe2O3. What should he label the column? 
a)
atoms
b)
compounds
c)
elements
d)
mixtures
20.
A student notices that when iodine (a yellow liquid) turns black when added to corn starch. How does the student know a chemical change took place?
a)
The iodine soaked into the cornstarch
b)
The iodine changed from yellow to black
c)
The cornstarch dissolved in the iodine
d)
The cornstarch is a white powder
21.
Which of the following is a chemical change?
a)
two liquids (potassium nitrate and lead iodide) mix and form a golden solid.
b)
sugar dissolves in lemonade making it sweeter.
c)
a beaker is dropped and breaks into small pieces
d)
a puddle of water evaporated in the sun
22.
Which of the following indicates that a new substance has formed?
a)
When water is added to oil it sinks to the bottom.
b)
After mixing a blue and a white liquid they have a greater mass than just one liquid.
c)
When a blue liquid is added to a clear liquid they take the shape of the container.
d)
A clear liquid is added to a blue liquid and it turns clear.
23.
What is the symbol for beryllium? 
a)
B
b)
Be
c)
Bi
d)
Na
24.
Which element is represented by the symbol He?
a)
hydrogen
b)
helium
c)
hafnium
d)
mercury
25.
The picture above is of strontium being added to water. What sign is there that strontium reacts with water?
a)
it is gray, silvery
b)
bubbles formed
c)
the water's volume increased
d)
the strontium sank to the bottom
26.
What makes a substance a compound?
a)
When the substance has more of one thing then another.
b)
When the substance is a gas.
c)
When the substance has a lot of something.
d)
When the substance has more than one element (pure substance).
27.
Which element has the symbol Ca?
a)
carbon
b)
calcium
c)
chlorine
d)
cobalt
28.
Which element has the symbol Cl?
a)
carbon
b)
calcium
c)
chlorine
d)
cobalt
29.

When you break a cracker into pieces it is a...

a)

Chemical change

b)

Physical change

30.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
31.

Cutting a log in to small pieces is a chemical change.

a)

true

b)

false

32.

Cutting a log in to small pieces is a chemical change.

a)

true

b)

false

33.

Which is an example of a chemical reaction?

a)

paper cut into small pieces

b)

chocolate melting in a pan

c)

flour and sugar mixed in a bowl

d)

cookies baking in an oven

34.

Which of the following is a sign that a chemical reaction has occurred?

a)

change in shape

b)

melting

c)

formation of a gas

d)

dissolving

35.

Evidence of a chemical reaction is?

You may select more than one answer.

a)

Precipitate

b)

Color Change (not predicted)

c)

Light Emissions

d)

Temperature & Odor Change

e)

Gas Formation (Bubbles)

36.

Elements have only ONE (1) capital letter. Compounds have 2 or more capital letters.

a)

True

b)

False

37.

Which of the following is NOT an element?

a)

H2O

b)

H2

c)

O2

d)

Nb

38.

Which of the following is NOT a compound?

a)

HCl

b)

Cl

c)

NaCl

d)

 CO2CO_2  

39.

A hot pack is broken and immediately begins to get hot, what has occurred?

a)

a physical change

b)

new elements were formed

c)

a chemical change

40.

What are the elements that occur most in the Earth's crust?

a)

Nitrogen, Oxygen: NO

b)

Oxygen, Hydrogen, Chlorine: OHCl

c)

Nitrogen, Oxygen: NO)

d)

Oxygen and Silicon: OSi

41.

What are the elements that occur most in the atmosphere? Check all that apply.

a)

Nitrogen

b)

Hydrogen

c)

Oxygen

d)

Carbon

42.

What are the elements that occur most in the oceans? Check all that apply.

a)

Hydrogen

b)

Carbon

c)

Oxygen

d)

Silicon

e)

Chlorine

43.

6.5C Formation of a New Substance: Is this statement TRUE or FALSE - The formation of a solid due to FREEZING is an example of a CHEMICAL Change?

a)

FALSE

b)

TRUE

44.

4. Pure substances that are composed of more than one type of atom are —

a)

elements and can be represented by one chemical symbol.

b)

alloys and can be represented by one chemical symbol.

c)

mixtures and can be represented by two or more chemical symbols.

d)

compounds and can be represented by two or more chemical symbols.

45.

5. These are the Element Characteristics of Argon :

· Odorless, Colorless, Tasteless.

· Poor conductor of thermal energy.

· Poor conductor of electrical energy.


Argon is most likely:

a)

A metal.

b)

A metalloid.

c)

An alloy.

d)

A nonmetal.

46.

9. A substance that is solid, has a dull yellow color, brittle, does not conduct electricity, and melts when highly heated could MOST likely be classified as a —

a)

Metal

b)

Nonmetal

c)

Alloy

d)

Metalloid

47.

10. Element Characteristics of Iron:

· Has a shine or glow.

· Ductile

· Easily magnetized

· Good conductor of thermal and electrical energy.


Iron is most likely:

a)

A nonmetal

b)

An alloy

c)

A metal

d)

A metalloid

48.

11. Bethanie had a beaker with a small amount of baking soda. She added a few drops of vinegar to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Marie determine about the new substance formed by mixing the baking soda and vinegar?

a)

A physical reaction that release air from the baking soda.

b)

A chemical reaction that released a gas.

c)

A chemical reaction that created a new liquid.

d)

No chemical reaction took place.

49.

12. Which element, that is essential for human life, is found in large amounts in both Earth's atmosphere and oceans?

a)

Krypton

b)

Silica

c)

Oxygen

d)

Copper

50.

A teacher had two clear liquids, Liquid A and Liquid B. The teacher filled one beaker with Liquid A, and then added Liquid B, drop by drop, until solid crystals suddenly formed on the bottom of the beaker. Which of these is the MOST LIKELY explanation for what happened?

a)

Liquid A changed phases from a liquid to a solid state.

b)

Liquid B evaporated, leaving behind solids that had been dissolved in it.

c)

Liquid A and Liquid B combined to form a new solid substance.

51.

Pure substances are composed of only one type of atom and arecalled:

a)

alloys and can be represented by one chemical symbol

b)

elements and can be represented by one chemical symbol

c)

mixtures and can be represented by two or more chemical symbols

d)

compounds and can be represented by two or more chemical symbols.

52.

is a list of the characteristics of the element sulfur (S).

Sulfur (S) is:

Dull appearance

Brittle

Poor conductor of heat and electricity

a)

Metal

b)

Metalloid

c)

Alloy

d)

Non-Metal

53.

A substance that is solid, has a shiny orange color, conducts electricity well, and melts when heated could MOST likely be classified as a —

a)

non-metal

b)

semi-alloy

c)

metal

d)

metalloid

54.

Boron (B) is found in meteoroids.

Boron is: Brittle, shiny, a Good conductor of heat, and a Poor conductor of electricity. Boron (B) is most likely a -

a)

semi-metal (weak metal)

b)

alloy

c)

metalloid

d)

non-metal

55.

Izzy had a beaker with a small amount of baking soda. He added a few drops of Vinegar to the baking soda and observed fizzing and bubbling. Based on his observation, which of these can Izzy determine about the new substance formed

a)

no chemical reaction occured

b)

A chemical reaction produced a gas.

c)

A chemical reaction produced a solid.

56.

What ALWAYS happens in a chemical change?

a)

new odor

b)

a new substance is formed

c)

bubbling

d)

a change in color

57.

Which element, that is essential for human life, is found in large amounts in both Earth's atmosphere and oceans?

a)

Helium

b)

Nitrogen

c)

Oxygen

d)

Calcium

58.

3. Which of the following is a compound?

a)

Au

b)

Ag

c)

Na2

d)

CO2

59.

4. Pure substances that are composed of more than one type of atom are —

a)

elements and can be represented by one chemical symbol.

b)

alloys and can be represented by one chemical symbol.

c)

mixtures and can be represented by two or more chemical symbols.

d)

compounds and can be represented by two or more chemical symbols.

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