Chemosynthesis video lesson

Before we start: What is the main energy source for photosynthesis?

• Carbon dioxide

• Water

• Sunlight

• Oxygen

What was found around the hydrothermal vents that was unexpected?

• Gigantic organisms only

• Many different organisms/ a whole ecosystem

• Nothing was found around the hot water vents

• Microscopic organisms only

What was found in the main organ (trophosome) of the worm?

• Sulfer crystals

• A light source

• Many mitochondria

• Carbon dioxide

What were the bacteria in the worm's trophosomes doing?

• Making more hydrogen sulfide as a source of anergy

• Breaking down hydrogen sulfide as a source of energy

• Filter out the hydrogen sulfide so the worm's could make energy

• They hydrogen sulfide broke down the bacteria in the trophosomes for energy

What is chemosynthesis?

• Another name for photosynthesis

• A type of medical treatment

• Where some organisms use chemicals, like hydrogen sulfide, as an energy source

• Where some organisms produce bioluminescent light

Photosynthesis uses light power; Chemosynthesis uses

• Water power

• Light power

• Green power

• Chemical power

Hydrothermal vent worms are the only organisms that do chemosynthesis.

• True

• False

Is chemosynthesis a "new trick" for life on earth?

• No - this might be what organisms first made needed energy for life

• Yes - this is newly developed in life and only a few organisms do it