WorksheetsMidterm Spring 2024
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
What is the chemical reaction in which hydrogen and hydroxide ions combine to produce water?
a)
Biosynthesis
b)
Neutralization
c)
Double Displacement
d)
Single Displacement
2.
The neutralization reaction between acids and bases produces _____.
a)
gas in the form of carbon MONOxide
b)
salt in the form of sodium Phosphate
c)
water
d)
Volatile chemicals
3.
Muffins are described as a quick bread because ___.
a)
there is no yeast
b)
they rely on chemical leaveners
c)
they rise quickly
d)
all of these
4.
In a donut glaze made from water and powdered sugar, what role does the water play?
a)
solvent
b)
solute
c)
emulsifier
d)
thickener
5.
All else held equal, which glass of water will dissolve more sugar?
a)
A glass of chilled water
b)
A glass of room temperature water
c)
A glass of boiling water
6.
A solution can be described as saturated, unsaturated, or supersaturated depending on the ___.
a)
concentration
b)
pH
c)
state of matter
d)
temperature
7.
The crispy, savory crust on the top of this steak was caused by which type of heat transfer?
a)
Conduction
b)
Telekinesis
c)
Refraction
d)
Pyrokinesis
8.
Which of the following is NOT a factor which increases solubility of a solute?
a)
Increase in temperature
b)
Agitation
c)
Particle size
d)
Decrease in temperature
9.
Water's ability to form a meniscus (pictured) is primarily due to which intrinsic property of water?
a)
Adhesion
b)
Van der Waals forces
c)
Covalent bonds
d)
Hydrophobicity
10.
Methods of heat transfer are alike in that all ____.
a)
have the same rates of reaction
b)
are equally suitable for every food
c)
transfer energy from a hotter substance to a cooler one
d)
use the same medium to transfer heat
11.
Pure substances ____.
a)
Are made of up of only one material
b)
Have definite and constant properties under certain conditions
c)
Are elements or compounds
d)
All of these are correct
12.
An example of a compound is ____.
a)
Salt
b)
Salt water
c)
Sodium
d)
Soft drinks
13.
An elements is described as ___.
a)
a substance that can be broken down into simpler substances
b)
a substance that is composed of one type of atom and cannot be broken down into a simpler substance.
c)
a substance made of two or more different types of atoms chemically combined.
14.
Cooking foods successfully depends on controlling ___.
a)
The rate of energy transfer
b)
how quickly a food absorbs energy
c)
how much energy a food absorbs
d)
all of these
15.
What type of energy transfer is involved in baking cookies?
a)
conduction only
b)
convection only
c)
both conduction and convection
d)
heat energy
16.
Why is it important not to have melted the butter when making chocolate chip cookies?
a)
Melting the butter takes too much time.
b)
Melting the butter makes mixing the dough too easy
c)
Melting the butter removes energy from the system
d)
Having the ingredients in the correct state of matter controlled the rate of chemical reactions.
17.
The ________ serves as the COMPARISON
a)
Independent variable
b)
Dependent variable
c)
Control
d)
Constant
18.
The more _________ foods have, the more a food will smell.
a)
Smelly chemicals
b)
Odorous chemicals
c)
Cheese-like chemicals
d)
Volatile chemicals
19.
What situation presents a special challenge to preventing food-borne illness?
a)
contaminated food may seem safe to eat
b)
since microorganisms are everywhere, illness is almost impossible to prevent
c)
many foods are not safely processed before reaching the supermarket
d)
none of these
20.
How does food infection differ from food intoxication?
a)
Food intoxication might require antibiotics; food infection will resolve with time.
b)
Food infection is caused by bacteria; intoxication by a virus
c)
Food intoxication is a more serious stage of food infection
d)
Food infection is caused by bacteria; intoxication by bacterial poisons
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