NGSS.MS-LS1-7

Gastric juices in the stomach digest food into a thick liquid.  This is...

• Mechanical digestion
• Chemical digestion

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NGSS.MS-LS1-7

a unit used in measuring the amount of energy food provides when eaten and digested

• heat index

• energized

• metabolism

• calorie

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NGSS.MS-LS1-7

Raoul ate a meal of oats before seeing his doctor. Oats are made of mostly starch molecules. Raoul feels tired, so his doctor gave him a test and found that Raoul’s cells contained glucose molecules, but they did not contain enough oxygen molecules. Does this explain why Raoul feels tired?

• A No, something else must be wrong because his cells have all the molecules they need.

• B Yes, his digestive system is breaking down starch molecules, but his respiratory system may not be working properly.

• C Yes, his respiratory system is working, but his digestive system is not getting energy from combining glucose molecules.

• D Yes, his digestive system is working, but his respiratory system is not breaking down oxygen, so his body stopped making energy.

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NGSS.MS-LS1-7

What is the most important function of the digestive system?

• Gas exchange

• Break down food

• Voluntary movement

• Fight bacteria and disease

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NGSS.MS-LS1-7

What type of energy transformation occurs when a hawk eats a mouse and then uses that energy to fly?

• chemical to mechanical

• mechanical to chemical

• thermal to mechanical

• mechanical to thermal

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NGSS.MS-LS1-7

The food that is digested goes from the mouth to the stomach. What happens after that?

• It goes to the liver, kidneys then the cells.

• It goes from the stomach to the small intestines.

• It goes from the stomach to the large intestines.

• It goes to the cells.

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NGSS.MS-LS1-7

True or False. Cells need oxygen molecules and glucose molecules to react to make energy?

• True.

• False.

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NGSS.MS-LS1-7

What part of a cell does cellular respiration take place?

• nucleus

• chloroplast

• cytoplasm

• mitochondria

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NGSS.MS-LS1-7

Organisms that must consume their food

• Producers

• Consumers

• Detritivores

• Carnivores

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NGSS.MS-LS1-7

Substance X directly supplies energy for various life functions, as shown in the diagram below. Which substance is represented by X in the diagram?

• ATP

• DNA

• starch

• glucose

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NGSS.MS-LS1-7