Quiz about Review Midterm Fall 2023

Question 1

The independent variable is part of which step of the scientific method?

Accepted Answer

Experiment

Answer

Observation / question

Answer

Hypothesis

Answer

Conclusion

Answer

Communication

Question 2

The ________ serves as the COMPARISON

Accepted Answer

Control

Answer

Independent variable

Answer

Dependent variable

Answer

Constant

Question 3

In a scientific experiment, the ___________  is/are considered everything except that which you are testing.

Accepted Answer

constants

Answer

Independent variable

Answer

Dependent variable

Answer

control

Question 4

A chocolate chip cookie's flavor would be an example of which type of data?

Accepted Answer

Qualitative

Answer

Quantitative

Question 5

The temperature of a chocolate chip cookie after taking it out of the oven would be an example of which type of data?

Accepted Answer

Quantitative

Answer

Qualitative

Question 6

Regarding our taste buds- food particles must be dissolved in __________ to be sensed.

Accepted Answer

Liquid

Answer

air

Answer

steam

Answer

ice

Question 7

A person who cannot distinguish flavors would be said to be

Accepted Answer

Taste blind

Answer

Taste averse

Answer

Non-taster

Answer

Taste-deaf

Question 8

A person in a land-locked state such as Iowa not having access to fresh sea food would be an example of which influence on food choice?

Accepted Answer

Geography

Answer

Economics

Answer

Psychology / emotion

Answer

Religion

Question 9

A boy who chooses to eat his father's greasy bean tacos because they give him good memories of time cooking together is an example of which influence on food choice?

Accepted Answer

Psychology / emotion

Answer

Economics

Answer

Religion

Answer

Geography

Question 10

A Catholic choosing to not eat meat on Fridays following lent is an example of which influence on food choice?

Accepted Answer

Religion / beliefs

Answer

Geography

Answer

economics

Answer

Psychology / emotion

Question 11

A man choosing a low-carb diet in an attempt to lose weight would be an example of which type of influence on food choice?

Accepted Answer

Health

Answer

Geography

Answer

Emotions / Psychology

Answer

Religion

Question 12

A busy mother who does not have the time to cook orders take-out for her family of 4. This is an example of which type of influence on food choice?

Accepted Answer

Time

Answer

Health

Answer

Cost

Answer

Geography

Question 13

What is one difference between enzymes and coenzyme?

Accepted Answer

enzymes are proteins; coenzymes may be other substances

Answer

coenzymes are destroyed by chemical reactions

Answer

enzymes are smaller than coenzymes

Answer

enzymes are organic; coenzymes or inorganic

Question 14

What would result if enzymes were not present?

Accepted Answer

cells would die from chemical reactions

Answer

foods would turn an unappealing color

Answer

the body would metabolize nutrients too quickly

Answer

all of the above

Question 15

What allows a particular enzyme to work on a particular substrate?

Accepted Answer

they fit at the active site

Answer

their pH levels neutralize one another

Answer

they contain the same amino acids

Answer

they carry opposite electrical charges

Question 16

Enzymes are used in food preparation to ____ cuts of meat that would otherwise be difficult to chew.

Accepted Answer

tenderize

Answer

coenzyme

Answer

oxygen

Answer

toughen

Question 17

Tightly sealing food packages slows enzyme activity by limiting the ____ in the atmosphere.

Accepted Answer

oxygen

Answer

carbon dioxide

Answer

nitrogen

Answer

hydrogen

Question 18

Enzymes are a special type of ____.

Accepted Answer

protein

Answer

complex carbohydrate

Answer

simple carbohydrate

Answer

lipid

Question 19

What situation presents a special challenge to preventing food-borne illness?

Accepted Answer

contaminated food may seem safe to eat

Answer

since microorganisms are everywhere, illness is almost impossible to prevent

Answer

many foods are not safely processed before reaching the supermarket

Answer

none of these

Question 20

Clean food on a dirty counter can be made unsafe to eat through ____ by neighboring microorganisms.

Accepted Answer

cross-contamination

Answer

mitosis

Answer

cloning

Answer

meiosis

Question 21

Foods generally cook by multiple types of heat transfer at the same time.

Accepted Answer

True

Answer

False

Question 22

Increasing a food's surface area decreases cooking time.

Accepted Answer

True

Answer

False

Question 23

Methods of heat transfer are alike in that all ____.

Accepted Answer

transfer energy from a hotter substance to a cooler one

Answer

have the same rates of reaction

Answer

are equally suitable for every food

Answer

use the same medium to transfer heat

Question 24

Rising, hotter molecules and dropping, cooler ones create a(n) ____ in a liquid or gas.

Accepted Answer

convection current

Answer

conduction current

Answer

electric current

Answer

radiant current

Question 25

Adding heat speeds the rate of chemical reactions in food by ___.

Accepted Answer

increasing the force and frequency of molecular colisions

Answer

releasing the heat energy stored in food

Answer

raising s food's specific heat

Answer

creating "hot spots" in sugars and fats

Question 26

When heat is applied to a substance, its molecules ___.

Accepted Answer

move more quickly

Answer

tumble and flow past each other

Answer

move apart until they no longer touch

Answer

remain locked in the same structure

Question 27

If you cook individual chicken pieces and a whole chicken under the same conditions, ____.

Accepted Answer

the chicken pieces will be done sooner

Answer

the chicken pieces will absorb more energy than the whole chicken

Answer

the whole chicken will be done sooner

Answer

the whole chicken will burn outside before it cooks inside

Question 28

____ cook more quickly that other media because they penetrate beyond a food's surface.

Accepted Answer

microwaves

Answer

crashing waves

Answer

light waves

Answer

sound waves

Question 29

What type of energy transfer is involved in baking cookies?

Accepted Answer

both conduction and convection

Answer

conduction only

Answer

convection only

Answer

heat energy

Question 30

How does the volume of the cookie affect baking time? (think of the chocolate chip cookies)

Accepted Answer

The larger cookie takes longer

Answer

There is no difference

Answer

The smaller cookie takes longer

Question 31

Why is it important not to have melted the butter when making chocolate chip cookies?

Accepted Answer

Having the ingredients in the correct state of matter controlled the rate  of chemical reactions.

Answer

Melting the butter takes too much time.

Answer

Melting the butter makes mixing the dough too easy

Answer

Melting the butter removes energy from the system

Question 32

Why is the temperature of the oven important?

Accepted Answer

It controls the rate of energy transfer.

Answer

To make sure you don't burn your hand.

Answer

Lower temperatures cook foods faster.

Answer

Higher temperatures cook foods faster.

Question 33

The bottom of a sugar cookie has a smooth brown appearance, while the top is lighter and uneven. This is because ____.

Accepted Answer

the bottom of the cookie is cooked by conduction, while the top is convection

Answer

the bottom of the cookie is cooked by convection, while the top is conduction

Answer

the cookie cooks by radiation

Answer

oven magic

Question 34

A thicker cookie takes longer to bake than a thinner cookie because _____. (think of the sugar cookies)

Accepted Answer

Energy transfer occurs at the surface, the thicker cookie has less surface area

Answer

the cookie is bigger

Answer

the cookie is smaller

Answer

Energy transfer occurs from the inside to the outside

Question 35

Temperature is ____.

Accepted Answer

an indirect measure of molecular motion

Answer

another term for heat

Answer

The measure of the average potential energy of individual molecules

Answer

all of these are correct

Question 36

Higher temperatures increase the rate of reactions because ___.

Accepted Answer

more molecules collide faster with greater force

Answer

both conduction and convection are used

Answer

less energy is absorbed

Answer

surface area increases

Question 37

When energy is transferred by convection, it is because ____.

Accepted Answer

of the motion of fluids or gases

Answer

molecules are pushed together

Answer

the fluids become more dense

Answer

all of these are correct

Question 38

Which is an example of energy being transferred mainly through conduction?

Accepted Answer

bacon cooking in a skillet

Answer

Water boiling in a kettle

Answer

a baseboard (floor) furnace vent heating a room

Answer

all or the above

Question 39

As the exposed surface area of a food increase, the ____.

Accepted Answer

cooking time decreases

Answer

mass increases

Answer

cooking time remains constant

Answer

cooking time increases

Question 40

When baking cookies, where do more chemical reactions occur?

Accepted Answer

more chemical reactions occur on the outside of the cookie because energy is transferred at the surface

Answer

more chemical reactions occur in the center of the cookie because it cooks last

Answer

chemical reactions occur equally throughout the cookie

Answer

all of these are correct

Question 41

Mixtures can be distinguished from compounds because ____.

Accepted Answer

the parts that make up a mixture keep their properties

Answer

they taste better

Answer

the are always solids

Answer

they are chemically bound

Question 42

dissolving sugar in iced tea is an example of a:

Accepted Answer

Physical change

Answer

Chemical Change

Question 43

A ________has different properties than the elements that form it.

Accepted Answer

compound

Answer

coilloids

Answer

solution

Answer

mixture

Question 44

Baking cookies is an example of a:

Accepted Answer

Chemical change

Answer

Physical change

Question 45

Lighting a match is an example of a:

Accepted Answer

Chemical change

Answer

Physical change

Question 46

Two or more elements chemically combined, whose properties are completely different from those of the individual elements, are known as ____.

Accepted Answer

Compound

Answer

Heterogeneous

Answer

Homogeneous

Answer

Solution

Question 47

Pure substances ____.

Accepted Answer

All of these are correct

Answer

Are made of up of only one material

Answer

Have definite and constant properties under certain conditions

Answer

Are elements or compounds

Answer

None of the above

Question 48

An example of heterogeneous mixture is ____.

Accepted Answer

Tossed Salad

Answer

Cola (flat)

Answer

Iced Tea

Answer

Sodium Chloride

Question 49

Which of the following involves a chemical change?

Accepted Answer

Combining baking soda and vinegar

Answer

Combining salt and water

Answer

Sweetening iced tea

Answer

Tossing salad

Question 50

What is an example of a reversible physical change?

Accepted Answer

State change

Answer

Change in color

Answer

Chopping

Answer

Rusting

Question 51

An example of an element is___. (in modern chemistry)

Accepted Answer

Iron

Answer

Air

Answer

Water

Answer

Fire

Question 52

An example of a compound is ____.

Accepted Answer

Salt

Answer

Salt water

Answer

Sodium

Answer

Soft drinks

Question 53

Which of the following causes chemical changes in food?

Accepted Answer

Cooking

Answer

Chopping

Answer

Peeling

Answer

Slicing

Question 54

What is an example of a homogeneous mixture?

Accepted Answer

Milk

Answer

Tossed salad (lettuce, carrots, cabbage)

Answer

Supreme pizza

Answer

Fruit salad

Question 55

An elements is described as ___.

Accepted Answer

a substance that is composed of one type of atom and cannot be broken down into a simpler substance.

Answer

a substance that can be broken down into simpler substances

Answer

a substance made of two or more different types of atoms chemically combined.

Question 56

Boiling water can separate the water from any minerals dissolved within because ___.

Accepted Answer

dissolving in solution is a reversible physical change

Answer

metallic elements in mineral forms ionic compounds

Answer

minerals have a greater molar mass than water

Answer

minerals and water are different types of compounds

Question 57

Salt is added to the pasta water because ____.

Accepted Answer

the salt dissolves in the water it is evenly distributed on the noodles

Answer

that is how it has been done for centuries

Answer

salt increases the boiling point

Answer

the pasta won't be sticky

Question 58

When no more solute will dissolve in the solvent, the substance is ___.

Accepted Answer

saturated

Answer

diluted

Answer

supersaturated

Answer

unsaturated

Question 59

The most common solvent in food is ___.

Accepted Answer

water

Answer

citric acid

Answer

sodium chloride

Answer

vinegar

Question 60

In a donut glaze made from water and powdered sugar, what role does the powdered sugar play?

Accepted Answer

solute

Answer

solvent

Answer

emulsifier

Answer

thickener

Question 61

Supersaturated sugar solutions are possible because ___.

Accepted Answer

sugar is more soluble in a hotter solvent

Answer

sugar caramelizes at high pH levels

Answer

starches absorb water as a solution is heated

Answer

none of these are correct

Question 62

Both solutes and solvents may be in any of the three ___ in which substances exist.

Accepted Answer

states

Answer

shapes

Answer

sizes

Answer

colors

Question 63

Solubility depends on ___.

Accepted Answer

all of the above

Answer

the solute

Answer

the solvent

Answer

temperature

Question 64

For most solid solutes, the solubility ___ as temperature increases.

Accepted Answer

increases

Answer

decreases

Answer

stays the same

Review Midterm Fall 2023

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