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Biology/chem

Total questions: 43

Worksheet time: 35mins

Name
Class
Date
1.

The chemical bond formed when two atoms share electrons is called a(an) IONIC bond.

a)

True

b)

False

2.

In a(an) POLAR bond, one atom pulls on the shared electrons more than the other atom.

a)

True

b)

False

3.

Write the correct formula for Sodium Chloride.

a)

SC

b)

SCl

c)

NaCl

d)

NaCl2

4.

How are covalent bonds formed?

a)

Sharing of electrons

b)

Transfer of electrons

5.

How are ionic bonds formed?

a)

Transfer of electrons

b)

Sharing of electrons

6.
Is this ionic bond drawn correctly?
a)
Yes
b)
No
7.

What is the left part of a chemical equation called?

H2 + O → H2O

a)

Reactants

b)

Products

c)

Chemical Equation

8.

The reactants are on the left side of the chemical equation.

a)

True

b)

False

9.

How many reactants are in A + B ---> C ?

a)

1

b)

2

c)

3

d)

4

10.

Matter can not be created nor destroyed: it can only be

a)

Destroyed a little bit

b)

Invisible

c)

Transformed, changed

d)

None of the above

11.

A substance that increases the rate of a reaction without being used up during the reaction is called a

a)

catalyst

b)

product

c)

reactant

12.

When a catalyst is added to a reaction the rate of reaction,,,

a)

Increases

b)

Decreases

c)

Does not change

13.

A catalyst increases the efficiency of collisions between reactants.

a)

true

b)

false

14.

____ includes RNA and DNA.

a)

carbohydrates

b)

proteins

c)

lipids

d)

nucleic acids

15.

____ is used for quick energy.

a)

carbohydrates

b)

proteins

c)

lipids

d)

nucleic acids

16.

____ is used to build and repair cells.

a)

carbohydrates

b)

lipids

c)

proteins

d)

nucleic acids

17.

____ is used to insulate the cell and provide long term storage.

a)

carbohydrates

b)

proteins

c)

lipids

d)

nucleic acids

18.
This is mostly a _____. 
a)
carbohydrate
b)
protein
c)
lipid
d)
nucleic acid
19.

An exothermic reaction...

a)

Absorbs heat

b)

Releases heat

c)

Both absorbs and releases heat

d)

Does nothing

20.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

21.

The pH scale is a range from:

a)

1-7

b)

0-14

c)

1-5

d)

1-20

22.

A(n) ______ is a substance with a pH less than 7

a)

Acid

b)

Alkaline

c)

Base

d)

Buffer

23.

A(n) _______ is a substance with a pH greater than 7.

a)

Base

b)

Acid

c)

Buffer

d)

Water

24.

What is the only substance with a neutral pH of 7?

a)

Milk

b)

Orange Juice

c)

Water

d)

Blood

25.

On the pH scale higher numbers indicate

a)

acids

b)

bases

26.

If the pH of a solution is 7 the solution is said to be

a)

Acidic

b)

Basic

c)

Neutral

27.

What are the two types of mixtures?

a)

element and sub-atomic

b)

atoms and compounds

c)

homogeneous and heterogeneous

d)

element

28.
It is a liquid mixture in which the minor component (the solute) is uniformly distributed with the major component (the solvent).
a)
solution
b)
element
c)
sub-atomic
d)
dissolution
29.

The other component of a solution is the part that does the dissolving. What is the name of this component?

a)

solvent

b)

dissolution

c)

element

d)

mixture

30.
The most common solvent on Earth is...
a)
gasoline
b)
water
c)
turpentine
d)
soda
31.
Chocolate milk is an example of a
a)
homogeneous mixture
b)
heterogeneous mixture
32.

The _____is the part that gets dissolved.

a)

solute

b)

solvent

c)

solution

d)

Sacajawea

33.

A solution is a kind of ________.

a)

mixture

b)

element

34.

Proteins are composed of what smaller subunits?

a)

amino acids

b)

nucleic acids

c)

fatty acids

d)

nucleotides

35.

Large molecules made up of small monomers are called

a)

polymers

b)

peptides

c)

monomers

36.

What is the function of ATP in living things?

a)

provides energy for cells

b)

stores genetic information

c)

provides structure in the nucleus

37.

Where does the energy for ATP come from?

a)

Nucleic Acid

b)

Protein

c)

Lipid

d)

Carbohydrate

38.
The drawing shows the structure of what molecule?
a)
A DNA molecule
b)
A lipid molecule
c)
A carbohydrate molecule
d)
A protein molecule
39.

What are the three components of a nucleotide?

a)

sugar, hydrogen, nitrogen base

b)

sugar, oxygen, nitrogen base

c)

sugar, phosphate, nitrogen base

40.
In the picture, what is the Mass number?
a)
19
b)
K
c)
39.098
d)
potassium
41.
In the picture, what is the atomic number for Sodium?
a)
11
b)
22.9
c)
Na
d)
none of the above
42.
A mixture would best be represented by what candy?
a)
M&M's
b)
Snickers
c)
Reese's 
d)
Kit Kat
43.

An example of a chemical reaction is?

a)

Two or more elements combined

b)

Only one element

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