Chemical and Physical Changes in Digestion

Match the following

a

exothermic reaction

color change

precipitate

Bubble production

Tags

NGSS.MS-PS1-2

Draw an example of a chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Organize these options into the right categories

Groups:

(a) Physical Change

,

(b) Chemical Change

• Chewing

• Chopping

• Stomach acid

• saliva

• color change

• Burning

• Folding

• Fever

• Peristalsis

Tags

NGSS.MS-LS1-7

​_​ is the pushing of food through the digestive tract (intestines).​ (a)  

• Peristalsis
• chewing
• salivating
• stomachchurning

Match the following

• Production of a gas

• Excuse

• Smell change

• Please

• Exo/ Endo thermic reaction (TEMPERATURE)

• Sneezes

• Color change

• Burps

• Bubbles produced

• Coughs

Draw an example of a chemical change

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Let's play a fun game of True or False! Here's your question: Mechanical Change and Physical Change are the same thing. What do you think?

• True

• False

Imagine you're a tiny person traveling through a giant sandwich. Which of the following would you consider a physical change during this wild journey?

• Seeing a gas being produced

• Witnessing the formation of a precipitate

• Experiencing teeth cutting and crushing the sandwich into smaller pieces

• Observing digestion with HCl in the stomach

Imagine you're a mad scientist conducting an experiment in your lab! Can you tell me the key difference between a physical change and a chemical change when you're transforming one substance into another?

• Physical changes in my experiments, like melting ice into water, always involve the production of heat or light

• Chemical changes in my experiments, like burning a piece of paper, change the size of a particle of a substance

• Chemical changes in my experiments, like rusting of iron, transform a substance into a completely different substance

• Chemical changes in my experiments, like dissolving sugar in water, do not change the identity of the substance

Tags

NGSS.MS-PS1-2

Imagine you're a scientist observing the digestion process in a lab. Which of these scenarios would be an example of a chemical change you'd witness during digestion?

• Teeth acting like a knife, cutting and crushing food into smaller pieces

• Food being tossed around like clothes in a washing machine in the stomach

• Food getting mixed with saliva, which is like a chemical solution containing enzymes

• Food being digested with HCl, like a chemical reaction happening in the stomach

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2