OpenSciEd 7.4

Why are some molecules absorbed into the blood stream, but some molecules are not?

• Some molecules are bigger than others.

• Some molecules are liquids.

• Some molecules are healthier for you.

• Some molecules are smaller than others.

When you eat, what happens to the fiber in your food?

• Fiber is broken down into starch molecules and absorbed

• Fiber is too big to be absorbed, so it is excreted as solid waste

• Fiber is broken down into glucose and absorbed

• Fiber is coming together and getting bigger. Then it is absorbed.

The exhaled air from our body consists mostly of__________

• carbon dioxide

• nitrous oxide

• oxygen

• helium

When you breathe, your lungs take in ___ and remove ___.

• air/oxygen

• oxygen/carbon dioxide

• carbon dioxide/waste

• waste/air

Our cells are constantly in need of energy. Through a chemical reaction, the cells turn _____ and _____ into a usable form of energy.

• oxygen ; carbon dioxide

• oxygen ; glucose

• carbon dioxide ; glucose

• carbon dioxide ; water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Blood is part of which system?

• circulatory

• respiratory

• digestive

Tags

NGSS.MS-LS1-3

Which reactant molecule from the air is needed by all of your cells?

• oxygen

• carbon dioxide

• fat

• glucose

Tags

NGSS.HS-LS1-7

How does oxygen get into the blood?

• it enters through the villi in the small intestine

• it enters through the alveoli in the lungs

• it is created during cellular respiration

Why do the cells of your body need glucose?

• for energy

• to excrete

• to absorb carbon dioxide.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS1-7

What part of the wave is labeled here?

• Amplitude

• Frequency

• Peak

• Wavelength

Tags

NGSS.MS-PS4-1