PMT 0170 RISK MANAGEMENT EXAM LATEST
QUESTIONS AND CORRECT VERIFIED ANSWERS |
ALREADY GRADED A+ {ACTUAL EXAM}
Name one other abiotic factor. - ANSWER: Light intensity; temperature; moisture
levels; soil pH; mineral / ion content of soil; wind intensity / speed ignore wind
direction; carbon dioxide levels; oxygen levels.
Each year the dead flowers and leaves of the bluebells and leaves from the trees fall
onto the ground. The bluebells do not run out of mineral ions. Explain why the
bluebells do not run out of mineral ions. The words in the box may help you. -
ANSWER: Dead leaves / flowers / bluebells are decayed; that microorganisms do the
decaying; minerals / ions / nutrients / named released (by decay / microorganisms);
& (released) into soil or minerals / ions / nutrients taken up / in by (bluebell) roots
(next year).
Wasps have stings, but hoverflies do not. The stripes on the hoverfly help the
hoverfly to avoid being eaten by predators. Explain why. - ANSWER: Looks like /
mimics a wasp or has warning colouration so predators think it has a sting.
Name two things for which plants compete. - ANSWER: Light, water, space &
nutrients / ions / minerals.
How did the students use the quadrat and the 30-metre tape measure to get the
results in Figure 3? - ANSWER: Place 30-m tape measure across field / from one
wood to the other. Place quadrat(s) next to the tape. Count / record the number /
amount of dandelions / plants in the quadrat. Repeat every 2 metres.
The teacher suggested that it was not possible to make a valid conclusion from these
results. Describe how the students could improve the investigation so that they
could make a valid conclusion. - ANSWER: Repeat (transect) / compare with the
results of other groups; at different / random location(s) / elsewhere (across the
field).
How would you improve the student's method to give a more accurate estimate? -
ANSWER: (more) quadrats / repeats placed randomly
Explain why the concentration of oxygen decreases. - ANSWER: Fertiliser / ions /
salts cause growth of algae / plants; (algae / plants) block light; (low light) causes
algae / plants to die; microorganisms / bacteria feed on / break down / cause decay
of organic matter / of dead plants; (aerobic) respiration (by microbes) uses O2.
Counting lichen - ANSWER: Line transect. Quadrat. Count number of lichens or
coverage on trees at regular intervals / set distances.
, Cattle give off large amounts of methane into the atmosphere. The methane causes
the Earth's temperature to increase. Give two effects of the temperature increase on
the environment. - ANSWER: • climate change / described e.g. hotter summers /
drought / seasons change • rise in sea levels / flooding allow other environmental
effects • glacier melting / ice caps melting • forest fires • habitat destruction • effect
on organisms • eg extinction / migration
Give two reasons why some farmers are in favour of growing GM crops. - ANSWER:
Higher yield & less use of pesticides.
Give two reasons why many people are against the growing of GM crops. - ANSWER:
• uncertain about effects on health
• fewer bees
• might breed with wild plant
• seeds only from one manufacturer
An airtight compost heap causes anaerobic decay. Explain why the gardener might
be against producing compost using this method. - ANSWER: Methane is produced
which is a greenhouse gas / causes global warming.
Some of the leaves from the gardener's strawberry plant die. The dead leaves fall off
the strawberry plant onto the ground. The carbon in the dead leaves is recycled
through the carbon cycle. Explain how the carbon is recycled into the growth of new
leaves. - ANSWER: Carbon compounds in dead leaves are broken down by
microorganisms / decomposers / bacteria / fungi when microorganisms respire and
release the carbon from the leaves. Photosynthesis uses carbon dioxide and plants
take in the carbon dioxide released to use in photosynthesis to produce glucose.
Glucose produced in photosynthesis is used to make amino acids / proteins /
cellulose which are required for the growth of new leaves.
Give three possible reasons that may have caused strawberry A to decay. - ANSWER:
(storage conditions)
• (at) higher temperature / hotter
• (had) more oxygen
• (had) more water / moisture
• (contained) more microorganisms (that cause decay)
Give two reasons why the mass of household waste is increasing each year. -
ANSWER: Rapid growth in population size & increase in the standard of living.
Storing the carbon dioxide helps to prevent more global warming. Carbon dioxide
can be stored (sequestered) in trees when they photosynthesise. Give one different
way in which carbon dioxide is sequestered in our environment. - ANSWER:
Absorbed by oceans & peat bogs.
Effects of deforestation - ANSWER: • reduces biodiversity
• destruction of habitats
QUESTIONS AND CORRECT VERIFIED ANSWERS |
ALREADY GRADED A+ {ACTUAL EXAM}
Name one other abiotic factor. - ANSWER: Light intensity; temperature; moisture
levels; soil pH; mineral / ion content of soil; wind intensity / speed ignore wind
direction; carbon dioxide levels; oxygen levels.
Each year the dead flowers and leaves of the bluebells and leaves from the trees fall
onto the ground. The bluebells do not run out of mineral ions. Explain why the
bluebells do not run out of mineral ions. The words in the box may help you. -
ANSWER: Dead leaves / flowers / bluebells are decayed; that microorganisms do the
decaying; minerals / ions / nutrients / named released (by decay / microorganisms);
& (released) into soil or minerals / ions / nutrients taken up / in by (bluebell) roots
(next year).
Wasps have stings, but hoverflies do not. The stripes on the hoverfly help the
hoverfly to avoid being eaten by predators. Explain why. - ANSWER: Looks like /
mimics a wasp or has warning colouration so predators think it has a sting.
Name two things for which plants compete. - ANSWER: Light, water, space &
nutrients / ions / minerals.
How did the students use the quadrat and the 30-metre tape measure to get the
results in Figure 3? - ANSWER: Place 30-m tape measure across field / from one
wood to the other. Place quadrat(s) next to the tape. Count / record the number /
amount of dandelions / plants in the quadrat. Repeat every 2 metres.
The teacher suggested that it was not possible to make a valid conclusion from these
results. Describe how the students could improve the investigation so that they
could make a valid conclusion. - ANSWER: Repeat (transect) / compare with the
results of other groups; at different / random location(s) / elsewhere (across the
field).
How would you improve the student's method to give a more accurate estimate? -
ANSWER: (more) quadrats / repeats placed randomly
Explain why the concentration of oxygen decreases. - ANSWER: Fertiliser / ions /
salts cause growth of algae / plants; (algae / plants) block light; (low light) causes
algae / plants to die; microorganisms / bacteria feed on / break down / cause decay
of organic matter / of dead plants; (aerobic) respiration (by microbes) uses O2.
Counting lichen - ANSWER: Line transect. Quadrat. Count number of lichens or
coverage on trees at regular intervals / set distances.
, Cattle give off large amounts of methane into the atmosphere. The methane causes
the Earth's temperature to increase. Give two effects of the temperature increase on
the environment. - ANSWER: • climate change / described e.g. hotter summers /
drought / seasons change • rise in sea levels / flooding allow other environmental
effects • glacier melting / ice caps melting • forest fires • habitat destruction • effect
on organisms • eg extinction / migration
Give two reasons why some farmers are in favour of growing GM crops. - ANSWER:
Higher yield & less use of pesticides.
Give two reasons why many people are against the growing of GM crops. - ANSWER:
• uncertain about effects on health
• fewer bees
• might breed with wild plant
• seeds only from one manufacturer
An airtight compost heap causes anaerobic decay. Explain why the gardener might
be against producing compost using this method. - ANSWER: Methane is produced
which is a greenhouse gas / causes global warming.
Some of the leaves from the gardener's strawberry plant die. The dead leaves fall off
the strawberry plant onto the ground. The carbon in the dead leaves is recycled
through the carbon cycle. Explain how the carbon is recycled into the growth of new
leaves. - ANSWER: Carbon compounds in dead leaves are broken down by
microorganisms / decomposers / bacteria / fungi when microorganisms respire and
release the carbon from the leaves. Photosynthesis uses carbon dioxide and plants
take in the carbon dioxide released to use in photosynthesis to produce glucose.
Glucose produced in photosynthesis is used to make amino acids / proteins /
cellulose which are required for the growth of new leaves.
Give three possible reasons that may have caused strawberry A to decay. - ANSWER:
(storage conditions)
• (at) higher temperature / hotter
• (had) more oxygen
• (had) more water / moisture
• (contained) more microorganisms (that cause decay)
Give two reasons why the mass of household waste is increasing each year. -
ANSWER: Rapid growth in population size & increase in the standard of living.
Storing the carbon dioxide helps to prevent more global warming. Carbon dioxide
can be stored (sequestered) in trees when they photosynthesise. Give one different
way in which carbon dioxide is sequestered in our environment. - ANSWER:
Absorbed by oceans & peat bogs.
Effects of deforestation - ANSWER: • reduces biodiversity
• destruction of habitats
