© REGION 4 EDUCA TION SERVICE CENTER.
ALL RIGHTS RESERVED.
Materials Materials
For each student
RM 3
For student groups
chart paper
markers
Evaluate
Teacher Instruction
Instruct student groups to use the chart paper and markers to create a concept
map showing physical and chemical changes that occur during digestion.
Provide time for students to present their concept maps to the class
using a gallery walk or other strategy.
Instruct students to complete RM 3:
Assessment—Physical and Chemical
Changes in Digestion.
Concept Map Answer Key
Student concept maps will vary.
Accept all appropriate maps.
Digestion in the body occurs
physically
in the
mouth
tearing and
grinding
food into
smaller
pieces
in the
mouth
enzymes in
saliva
in the
stomach
mixing of bolus
and gastric
juices
in the
stomach
enzymes,
hydrochloric acid,
and other
gastric juices
in the
large
intestine
removal
of water
in the
small
intestine
enzymes
from
pancreas
and liver
chemically
RM 3 Answer Key
1. B
2. H
3. D
4. G
5. A
6. F
© REGION 4 EDUCA TION SERVICE CENTER.
ALL RIGHTS RESERVED.
Gateways to Science, STAAR Edition, Grade 7
Lesson 1: Physical and Chemical Changes in Digestion
Page 1 of 2
Choose the best answer for each question.
1 All of the following are examples of a chemical change except —
A photosynthesis
B chewing food into smaller pieces
C vinegar reacting with baking soda
D enzymes breaking starches into sugars
2 Which type of changes occurs in the mouth during digestion?
F Physical changes
G Chemical changes
H Physical and chemical changes
J No changes occur
3 Which of the following is the major function of the digestive
system?
A Filter waste from the blood
B T ransport nutrients to the cells
C Reabsorb water from the large intestine
D Break larger molecules into smaller molecules
UNIT 5: Structure and Function of Organisms, Part 2 RM 3
Assessment—Physical and Chemical Changes in Digestion
Lesson 1: Physical and Chemical Changes in Digestion
Unit 5:
Structure and Function of Organisms, Part 2
