transpiration 2

what is the name of an instrument that used to measure the rate of transpiration?

• sphygmomanometer

• potometer

• photometer

• calorimeter

the figure shows an instrument used in science experiment. This instrument measures ...

• light intensity

• photosynthesis

• rate of water loss

• High Humidity

the figure shows a potometer. how can you reset a potometer so that the air bubble is at Zero mark of the scale?

• open the tap

• fill the syringe with water

• turn the ruler upside down

• push the plunger of the syringe

the figure shows a potometer exposed to a fan. why will the air bubble in the potometer move faster?

• the fan cools the surrounding

• the noise from the fan opens the stomata

• wind from the fan blows away moisture around the plant

• the fan causes the plant to bend on one side

which one of the following would cause the air bubble in a potometer to move slowly

• high temperature

• high wind speed

• high humidity

• high light intensity

the animal shown in the figure has what type of skeleton?

• hydrostatic

• endoskeleton

• exoskeleton

• insectskeleton

the heart is part of which system?

• cardiac

• pumping

• blood

• circulatory

two shoots were treated differently. to one shoot all the leaves were removed while to the other non of the leaves were removed. then placed in water as shown. one with leaves lost a lot of water. what does this show?

• a plant loses water only through the leaves

• a plant loses water only through the stem

• much water is lost through the stem

• much water is lost through the leaves

which one of the following explains why the air bubble of a potometer exposed to a light bulb moves faster?

• light excites bubbles

• light causes the stomata to open wider

• the light bulb supports transpiration

• water moves faster during the day

why is a potometer not 100% efficient in measuring the rate of transpiration?

• water used is not pure

• water used during photosynthesis is not accounted for

• the use of an air bubble is not reliabe

• the ruler being used may be faulty