Worksheets7th Grade Physical/Chemical Digestion
Total questions: 22
Worksheet time: 23mins
Name
Class
Date
1.
Where does digestion begin?
a)
In the small intestine
b)
In the mouth
c)
In the throat
d)
In the stomach
2.
Saliva breaking down carbohydrates into sugars is...
a)
physical/mechanical
b)
chemical
3.
Chewing and tearing apart food into smaller pieces is...
a)
physical/mechanical
b)
chemical
4.
Hydrochloric acid in the stomach breaking down food is...
a)
physical/mechanical
b)
chemical
5.
The stomach pushing and churning food is...
a)
physical/mechanical
b)
chemical
6.
Protein is digested in the...
a)
mouth
b)
esophagus
c)
stomach
d)
small intestine
7.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
8.
Is hammering wood together to build a house a chemical or physical change?
a)
chemical
b)
physical
9.
Enzymes, secretions, and converting into other substances are examples of:
a)
physical/mechanical digestion
b)
chemical digestion
10.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
11.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
12.
When you break a cracker into pieces it is a
a)
Chemical change
b)
Physical change
c)
Chemical Weathering
d)
Physical Weathering
13.
Jayden asked Gabe what she could do to an egg for a chemical change. Gabe answered correctly and said...
a)
You can drop the egg.
b)
You can cook the egg.
c)
You can crack the egg.
d)
You can paint the egg.
14.
What is the purpose of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
15.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
16.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
17.
These are found on the Periodic Table.
a)
elements
b)
mixtures
c)
compounds
18.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
19.
Which of the following elements is required in an organic compound?
a)
nitrogen
b)
oxygen
c)
carbon
d)
sodium
20.
The compound PO4 is...
a)
inorganic
b)
organic
21.
Is NaCl (table salt) a Organic or Inorganic Compound?
a)
Inorganic
b)
Organic
22.
Which of the following formulas is inorganic?
a)
CHO
b)
CH
c)
SiO
d)
CHCOOH
100 %
