Year 11 Photosynthesis exam questions KWH

 Plants absorb _____ energy for the photosynthesis reaction.

 Plants absorb light energy by ___________ for the photosynthesis reaction.

Students investigated the effect of temperature on the rate of photosynthesis. The students shone light from a lamp onto pondweed and measured the volume of oxygen produced per hour.

Calculate mean value X.

Students investigated the effect of temperature on the rate of photosynthesis. The students shone light from a lamp onto pondweed and measured the volume of oxygen produced per hour.

The students identified one anomalous result in the table.

Which is it?

Students investigated the effect of temperature on the rate of photosynthesis. The students shone light from a lamp onto pondweed and measured the volume of oxygen produced per hour.

The students identified one anomalous result in the table.

How did the students deal with the anomalous result?

• scale / value was misread

•  the lamp / light was the same distance throughout

• same length of pondweed

• pondweed was acclimatised

Students investigated the effect of temperature on the rate of photosynthesis. The students shone light from a lamp onto pondweed and measured the volume of oxygen produced per hour.

The students identified one anomalous result in the table.

Which is it?

Students investigated the effect of temperature on the rate of photosynthesis. The students shone light from a lamp onto pondweed and measured the volume of oxygen produced per hour.

Give two factors the students should have kept constant in this investigation.

• light intensity

• temperature

• volume of oxygen collected in an hour

•  pondweed size / amount

Students investigated the effect of temperature on the rate of photosynthesis. The students shone light from a lamp onto pondweed and measured the volume of oxygen produced per hour.

Why did the rate of photosynthesis decrease from 35 °C to 45 °C?

• enzymes lose the shape of the active site

• temperature changed

• misread values

• different length of pondweed used

Students investigated the effect of temperature on the rate of photosynthesis. The students shone light from a lamp onto pondweed and measured the volume of oxygen produced per hour.

 Label the y-axis.

• Rate of photosynthesis in cm³/hour

• volume of oxygen produced per hour

• Rate of photosynthesis

What process is this the equation for?

_____________ + water → _______ + oxygen