Earth's Water and Plant Transpiration

Vocabulary flashcards covering the planetary presence of water, light absorption, space observation, and plant transpiration mechanisms.

Space probe

A spacecraft launched from Earth with a mission to explore space, such as leaving the solar system to travel through interstellar space.

Voyager 1

A space probe sent to travel through interstellar space, which in 1990 captured a photograph showing Earth as a blue spot about the size of a full stop from six billion kilometres away.

Interstellar space

The region beyond the solar system through which the Voyager 1 probe was tasked to travel.

Water cycle

The cycle through which plants obtain water, supporting their existence and that of all life on the planet.

Transpiration

The process by which plants lose water from their leaves.

Transpiration stream

The continuous movement of water from the roots through the stem to the leaves.

Xylem tissue

Plant tissue present in the stem, roots, and veins that transports water upward to replace water lost by leaf cells.

Diffusion of water vapour (leaf)

The movement of water vapour out of the holes on the lower surface of a leaf, occurring when there is less water vapour outside the leaf than inside it.