© REGION 4 EDUCA TION SERVICE CENTER.
ALL RIGHTS RESERVED.
Explore
Page 194
cienc
e
Sheets • 200 Pages • Wide Ruled
9 3/4 x 7 1/2 in. • 24.7 x 19.0 cm
1. Write a hypothesis of what will happen when pineapple is placed on gelatin.
Record your hypothesis in your science notebook.
2. Place the small piece of pineapple in the middle of the Petri dish containing
gelatin.
3. Over several minutes, record your observations.
4. Dispose of all materials according to your teacher’s directions.
Leave
your
area clean and organized.
Conclusion
1. Do your results support your hypothesis? Student answers will vary.
Accept
all appropriate answers.
2. Did a chemical change occur? A chemical change did occur. If yes,
what
evidence do you have? It appears that a new substance was formed. The
gelatin, in contact with the pineapple, was broken down.
Advance Preparation
Prepare the gelatin mix according to box directions and pour into Petri dishes or
portion cups prior to class.
Place in refrigerator to aid in hardening the gelatin.
Cut the pineapple into small pieces, approximately 3 cm x 3 cm.
Teacher Instruction
Ask students to hypothesize what will happen prior to placing the pineapple on
the gelatin.
Instruct students to complete the science notebook entry.
Lesson 1: Physical and Chemical Changes in Digestion
Unit 5:
Structure and Function of Organisms, Part 2
