7.6A Chemical and Physical changes (enzymes)
Authored by Randol Jimenez
Science
6th - 8th Grade
NGSS covered
Used 8+ times
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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When you chew a piece of food, your salivary glands release saliva to moisten the food allowing you to swallow the consumed food for the next step of digestion. Additionally, saliva has enzymes that begin to breakdown the starches within the food into smaller molecular components called glucose. What kind of change results from the breakdown of starch into glucose by saliva?
mechanical
physical
chemical
cyclical
Tags
NGSS.MS-PS1-2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What change occurs to food by your teeth as you chew?
physical changes only
chemical changes only
both physical and chemical changes
neither physical nor chemical change
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which step in the digestive process represents a chemical change in food?
storing of swallowed food in the stomach
muscles that line the stomach mixing the consumed food and liquids
moving the food down the esophagus and into the stomach
enzymes within the small intestines breaking down the food into smaller molecules
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Your stomach digests a yummy cookie with enzymes. Is this chemical or physical digestion? Is it both?
physical
chemical
both
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is a chemical change that occurs to the food?
The reduction in size of food particles as food is chewed
The movement of food to the stomach after food is swallowed
The breakdown of molecules of food by enzymes and acid in the stomach
None of the above
Tags
NGSS.MS-LS1-2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Researchers are investigating processes that happen during digestion. Which answer choice describes only a physical change during digestion?
Hydrochloric acid in the stomach breaks down proteins
Chewing in the mouth breaks food into small pieces
Enzymes in saliva start the digestion of starches before food is swallowed
Bacteria in the intestines convert dietary fiber into fats
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A change in the shape of a substance
chemical change
Physical change
Chemical Change
Precipitate
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