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Midterm Review Physical Science 20-21

Total questions: 62

Worksheet time: 28mins

Name
Class
Date
1.

The melting point of a substance is the temperature at which the substance changes from a solid to

a)

Gas

b)

Liquid

c)

Solid

d)

Plasma

2.

The characteristics of a substance depends on its size.

a)

True

b)

False

3.

If you had two different substances that looked exactly the same, which properties would you use to tell them apart?

a)

Sound

b)

Size

c)

Color

d)

Density

4.

An _______________ is made up of one or more of the same kind of atom chemically combined.

a)

atom

b)

element

c)

molecule

d)

compound

5.

A ______________ is made up of different kinds of atoms chemically combined.

a)

element

b)

compound

c)

mixture

d)

molecule

6.

A _____________ contains a variety of elements and compounds that are not chemically combined with each other.

a)

compound

b)

element

c)

molecule

d)

mixture

7.

Elements and compounds are pure substances.

a)

True

b)

False

8.

Which of the following is a way we can classify compounds?

a)

by their pH level

b)

as organic or inorganic

c)

by their role in the body

d)

all of these

9.

Elements are broadly classified as metals, nonmetals, and _________________.

a)

compounds

b)

organic

c)

metalloids

d)

Metallica

10.

A ______________ mixture is one that does not have a uniform composition.

a)

heterogeneous

b)

homogenous

c)

pure substance

d)

compound

11.

A _________________ mixture is one where the substances are evenly spread throughout.

a)

heterogeneous

b)

homogeneous

c)

pure substance

d)

compound

12.

_______________ are mixtures in which its particles are too big to stay mixed without being stirred or shaken.

a)

Solutions

b)

Colloids

c)

Suspensions

d)

Homogeneous Mixture

13.

In a ______________, one substance is dissolved in another substance.

a)

solution

b)

suspension

c)

colloid

d)

compound

14.

A type of mixture that falls in between suspensions and solutions are called ______________.

a)

solutions

b)

colloids

c)

suspensions

d)

pure substances

15.

A snow globe would be an example of a __________________.

a)

colloid

b)

solution

c)

suspension

d)

compound

16.

Milk and gelatin are examples of __________________.

a)

suspensions

b)

colloids

c)

solutions

d)

compound

17.

Fruit Loops, pizza, and Skittles are examples of ____________________ mixtures.

a)

heterogeneous

b)

homogeneous

c)

pure

d)

compound

18.

Coffee, mouthwash, and vinegar are examples of __________________ mixtures.

a)

heterogeneous

b)

homogeneous

c)

pure

d)

compound

19.

According to the pH range which substance is more acidic than lemon juice

a)

hydrochloric acid

b)

cabbage

c)

milk

d)

water

20.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
21.

Feels slippery.

a)

Acids

b)

Bases

c)

All

d)

Water

22.

pH less than 7.

a)

Acids

b)

Bases

c)

All

d)

Water

23.

pH greater than 7.

a)

Acids

b)

Bases

c)

All

d)

Water

24.

Which is most acidic?

a)

milk

b)

lemon Juice

c)

bleach

d)

water

25.
The pH scale measures ____ and ____
a)
acidity and basic 
b)
the temperature 
c)
how fun a chemistry quiz is
d)
none of the above 
26.
Acids are __________, which means they "eat away" at other materials.
a)
transitional metal
b)
alkiline
c)
flammable
d)
corrosive
27.
Which is the stronger acid?
a)
pH 1
b)
pH 4
c)
pH 8
d)
pH 13
28.
A solution with a pH of 7 is________
a)
increasing
b)
neutral
c)
decreasing
d)
apple juice
29.
Which range of numbers represent an acidic solution?
a)
0-6
b)
7
c)
8-14
d)
5-9
30.
Which range of numbers represent basic solution?
a)
0-6
b)
7
c)
8-14
d)
3-9
31.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
32.

Which food is the most acidic?

a)

bananas

b)

lemon juice

c)

orange juice

d)

water

33.

Pollution causes the pH of rain water fall below 6. What is such type of rain called?

a)

acid rain

b)

polluted rain

c)

low pH rain

d)

alkaline rain

34.
If the pH of a solution is 9, it is a....
a)
acid
b)
base
c)
both
d)
none
35.
Hydrogen is a pure substance represented by the chemical symbol H. Which of the following best describes hydrogen?
a)
Hydrogen is an element made of two or more kinds of atoms.
b)
Hydrogen is a compound made of only one kind of atom.
c)
Hydrogen is a compound made of two or more kinds of atoms.
d)
Hydrogen is an element made of only one kind of atom.
36.
The element oxygen, represented by the symbol O, is classified as
a)
a pure substance
b)
a compound
c)
a mixture
d)
a solution
37.
Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).
a)
methane is an element and carbon and hydrogen are compounds.
b)
carbon, hydrogen, and methane are all elements.
c)
carbon, hydrogen, and methane are all compounds.
d)
carbon and hydrogen are elements and methane is a compound.
38.

What is a compound?

a)

an atom with more electrons than protons

b)

a substance in which the atoms of two or more different elements are combined together in a fixed ratio

c)

an atom with more neutrons than protons

d)

a substance in which the atoms of three or more elements are combined together

39.
The chemical combination of two or more different kinds of atoms in fixed amounts is called a(n)
a)
orbit
b)
compound
c)
mixture
d)
element
40.
Atoms combine to form _______. 
a)
electrons
b)
molecules
c)
nuclei
d)
neutrons
41.
A compound is...
a)
a substance made up of one type of atom in its molecular form.
b)
a substance formed by the reaction of two or more elements.
c)
a mixture formed by the mixing of two or more elements.
d)
a substance made up of one type of atom in its atomic form.
42.
Carbon dioxide is formed when two oxygen atoms chemically combine with a carbon atom. Which term best describes carbon dioxide?
a)
atom
b)
mixture
c)
element
d)
compound
43.
What defines a mixture?
a)
described by a chemical formula
b)
can be broken down into its basic substances through physical means
c)
created through a chemical reaction
d)
cannot be broken down into simpler substances
44.
The air we breathe contains different individual gases (mostly nitrogen and oxygen). Which of the following correctly describes the air we breathe?
a)
compound
b)
liquid
c)
element
d)
mixture
45.

Where are protons and neutrons located?

a)

in the nucleus

b)

in the electron cloud

c)

in the valence shell

d)

inside the protons

46.
What is the charge of an electron? 
a)
positive
b)
neutral
c)
negative
47.

Sucrose is another name for table sugar. Sucrose is a compound made from the elements carbon, hydrogen, and oxygen. Which statement best describes the properties of sucrose?

a)

They are exactly like the properties of carbon

b)

They are exactly like the properties of oxygen

c)

They are exactly like the properties of hydrogen

d)

They are different from the properties of all elements sucrose contains

48.

What do elements, compounds, and mixtures have in common?

a)

They are all made up of atoms

b)

They are all made up of pure substances

c)

They can be broken down physically

d)

They are all found on the Periodic Table

49.

Lead is a

a)

pure substance

b)

compound

c)

heterogenous mixture

d)

homogenous mixture

50.

Table salt (NaCl) is a

a)

compound

b)

homogenous mixture

c)

heterogenous mixture

d)

pure substance

51.

Deliciousness

a)

compound

b)

heterogenous mixture

c)

homogenous mixture

d)

pure substance

52.

Vegetable soup is a

a)

heterogenous mixture

b)

compound

c)

pure substance

d)

homogenous mixture

53.

Oxygen is a

a)

pure substance

b)

homogenous mixture

c)

compound

d)

heterogenous mixture

54.

Water is a

a)

pure substance

b)

compound

c)

heterogenous mixture

d)

homogenous mixture

55.

Concrete is a

a)

compound

b)

mixture

c)

element

d)

pure substance

56.

Gold is a

a)

compound

b)

pure substance

c)

heterogenous mixture

d)

homogenous mixture

57.

Brass is a

a)

compound

b)

pure substance

c)

homogenous mixture

d)

heterogenous mixture

58.

Soda is a

a)

compound

b)

homogenous mixture

c)

heterogenous mixture

d)

pure substance

59.

Air is a

a)

Compound

b)

Mixture

c)

Element

d)

Non-matter

60.

Iron is a

a)

pure substance

b)

compound

c)

heterogenous mixture

d)

homogenous mixture

61.

Rust (Fe2O3)

a)

compound

b)

heterogenous mixture

c)

homogenous mixture

d)

pure substance

62.

Soil

a)

compound

b)

heterogenous mixture

c)

homogenous mixture

d)

pure substance

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