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WorksheetsYr 8 Body Systems - Mechanical and Chemical Digestion
Total questions: 30
Worksheet time: 16mins
Name
Class
Date
1.
Gastric juices in the stomach digest food into a thick liquid. This is...
a)
Mechanical digestion
b)
Chemical digestion
2.
Enzymes (chemicals) in your saliva help break down food while chewing. This is...
a)
Mechanical digestion
b)
Chemical digestion
3.
The liquid inside the mouth that contains enzymes to begin digestion is called ____________.
a)
saliva
b)
salivary glands
c)
bile
4.
The major function of having enzymes in our digestive system is ______________.
a)
to eliminate undigested food
b)
to absorb water in the intestine
c)
to speed up chemical reactions during digestion
5.
The crushing and mashing of food is what type of digestion?
a)
Chemical
b)
Mechanical
6.
The muscles of the stomach mix and churn food you eat.
a)
True
b)
False
7.
What starts the process of chemical breakdown?
a)
Saliva
b)
Oxygen
c)
Hydrogen
8.
Type of digestion in the stomach:
a)
Mechanical
b)
Chemical
c)
Both
9.
Chewing food with teeth is an example of a
a)
physical change
b)
chemical change
10.
Changes the size, shape, or color of food:
a)
Physical digestion
b)
Chemical Digestion
11.
The stomach releases hydrochloric acid and enzymes that break down the protein in meats and turn the protein into amino acids. This change is
a)
Physical
b)
Chemical
12.
Acids and enzymes are used in
a)
physical digestion
b)
chemical digestion
13.
During chemical digestion
a)
only changes in size and shape occur
b)
a new substance is formed
14.
What is the function of the teeth and tongue
a)
chemical digestion
b)
break down food
c)
mechanical digestion
d)
they only chew food
15.
Process by which enzymes break down food into small molecules that the body can use
a)
peristalsis
b)
chyme
c)
chemical diagestion
d)
mechanical diagestion
16.
A type of protein that speeds up a chemical diagestion
a)
enzyme
b)
villi
c)
alveoli
d)
capillary
17.
What type of digestion is done in the pharynx?
a)
mechanical
b)
chemical
c)
both
d)
neither
18.
What does not occur here?
a)
mechanical digestion
b)
chemical digestion
c)
absorption
d)
all occur here
19.
Mechanical digestion does NOT occur in the.....
a)
mouth
b)
stomach
c)
small intestine
d)
large intestine
20.
Which of the following questions is incorrect?
a)
Both mechanical and chemical digestion takes place in the mouth
b)
Teeth chewing and breaking down food is an example of mechanical digestion
c)
Chemical digestion starts in the stomach
d)
Saliva chemically breaks down starches in your mouth
21.
A change in matter in which no new substances are formed is a
a)
Chemical Change
b)
Physical Change
22.
A change in matter that creates a new substance or substances is called a
a)
Physical change
b)
Chemical change
23.
Which type of digestion breaks food into smaller pieces?
a)
mechanical
b)
chemical
24.
Which type of digestion breaks food into simpler nutrients that can be used by the cells?
a)
Chemical
b)
Mechanical
25.
Chew
a)
Physical
b)
Chemical
26.
The bacteria in the large intestine can digest some material, creating a gas.
a)
Physical
b)
Chemical
c)
Both
d)
Neither
27.
During chemical digestion
a)
only changes in size and shape occur
b)
food is chemically changed by acid, bases and enzymes
28.
The mouth digests (breaks down) _________ by chewing.
a)
mechanically
b)
chemically
c)
elimination
d)
absorption
29.
Breaking food down with the use of enzymes is known as
a)
Chemical Digestion
b)
Physical Digestion
c)
Wind Digestion
d)
Light Digestion
30.
Saliva breaking down carbohydrates into sugars is...
a)
physical/mechanical
b)
chemical
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