OCR Combined Science A Papers 2 and 8 Automock

#1. Which of these processes allows saltwater to become potable?

filtration

distillation

precipitation

#2. Which of these is a population?

Includes the local environment where an organism normally lives

Includes all of the organisms in a particular environment as well as the environment itself

Includes all of the individuals of a particular species in an environment

Includes all of the organisms that live in a particular environment

#3. Is this relationship parasitic or mutualistic? A crocodile which lets a small bird feed on leftover meat between its teeth

Parasitic

Neither

Mutualistic

#4. Producers are organisms which do what?

Eat other organisms that produce glucose

Make glucose through photosynthesis

#5. Match the description to the correct term. All of the individuals of a species that live in a particular woodland.

Ecosystem

Habitat

Community

Population

#6. Why can humans only survive a few days without water?

water allows us to swallow our food

without water our mouths become too dry to speak

most of our body is made of water and it is continually lost to the environment

#7. Respiration from animals is a source of carbon dioxide in the atmosphere – do plants also use respiration?

only carnivorous plants perform respiration

yes

no

#8. Predators are essential for healthy ecosystems – what happens if predators are removed due to extinction?

Increases in overall biomass production in an ecosystem

Increases in biodiversity

Reductions in biodiversity

#9. The water cycle has one part where water is in solid form – what is that form of storage?

glaciers and icesheets

groundwater

clouds

oceans

#10. In mutualistic feeding relationships – which organisms benefit?

Only one organism

Both organisms

None of the organisms

#11. Which of the following are strategies organisms use to adapt to changing abiotic conditions?

Select all that apply:

Eating less food

Moving to new areas

Changing diet

#12. Decomposers break down dead animal and plant material – what happens to the carbon inside the dead organisms?

all of the carbon becomes part of the decomposers

part of the carbon is released during respiration and part is stored in the composers cells

all of the carbon is released during respiration

#13. In a scientific investigation, you and two others randomly sample a rocky shore using quadrats. You find that on average there are 2 crabs per quadrat and the whole shore would be covered by 150 quadrats. Estimate how many crabs are on the whole shore.

175

150

300

450

#14. Finish the sentence: Nitrogen compounds found in artificial fertilisers are ……… and dissolve in the soil’s water.

soluble

permeable

potable

#15. Where are nitrogen-fixing bacteria found in plants such as peas and beans?

In root nodules

In leaves

In the stem

#16. Tapeworms and ticks are examples of parasites – which of these lives inside another organism?

Tapeworms

Neither

Ticks

#17. Name two resources that both animals and plants need to survive and reproduce? ? structure your answer like this: ..... and .....

#18. By which process does water in the clouds move onto land?

condensation

precipitation

evaporation

distillation

sublimation

#19. Where does the water in lakes and rivers end up?

clouds

oceans

#20. True or false – volcanism removes carbon from the atmosphere

true

false

#21. Why do we use systematic or random sampling of an area to determine the distribution or abundance of organisms?

The samples must be representative of the whole area to avoid bias

Random sampling over and over again will eventually lead to samples of the entire area

The samples must be collected at random to make sure the same part of an area is sampled at least twice

#22. What do we call the process by which farmers change the crops they grow each year to maintain nitrogen in the soil?

Harvest sequencing

Crop rotation

Cyclical changes

#23. The 5 kingdoms of life are Animals, Plants, Fungi, Protists and Prokaryotes. Which kingdom do algae belong to?

#24. Which of these is an ecosystem?

Includes all of the organisms that live in a particular environment

Includes all of the individuals of a particular species in an environment

Includes all of the organisms in a particular environment as well as the environment itself

Includes the local environment where an organism normally lives

#25. How can parasites affect the nutrition of their hosts?

By making feeding more difficult for their hosts

By taking some of their nutrients for themselves - leaving less for the hosts

By poisoning the hosts until they perish

#26. What are the three domains?

Bacteria, Archaea, and Eukarya

Eurkarya, Fungi and Bacteria

Animals, Plants and Bacteria

#27. How do most plants get their nitrogen?

From the air - absorbed through their leaves

From the soil - absorbed through their roots

#28. Which type of factor is nutrient availability?

Abiotic

Inbiotic

Sub-biotic

Biotic

#29. Why do plants need nitrogen?

Nitrogen is one of the ingredients in cellulose which makes up their cell walls

They have compounds containing nitrogen in their DNA and in proteins

Nitrogen is a key ingredient in photosynthesis

#30. What do we call animals that only eat plants?

#31. What do we call animals that are eaten by other animals?

Predators

Prey

#32. True or false – plants remove carbon from the atmosphere during photosynthesis

false

true

#33. In typical feeding relationships there are two elements – what are they?

Pest and controller

Legumes and native-action

Predators and prey

#34. Which of these substances is sometimes added to water to make it potable?

lead

hydrogen

chlorine

ice

#35. Is the following statement accurate: nitrogen be can be moved back and forth from the atmosphere and into the soil by bacteria.

Yes

No

#36. What are abiotic factors?

Biological environmental factors which affect the distribution and abundance of organisms

Factors which affect the ability of scientists to sample the environment - leading to errors in measurements

Physical and chemical environmental factors which affect the distribution and abundance of organisms

#37. Which of the following is the source of oil and gas?

dead plankton from millions of years ago

nuclear decay from millions of years ago

dead and buried plant material from millions of years ago

#38. Which type of factor is competition?

Sub-biotic

Abiotic

Inbiotic

Biotic

#39. What is the binomial name for humans?

#40. What is a parasite?

An organism that feeds upon another without killing it

An organism that feeds on the same producers as another organism

An organism that releases toxic gases and scares its competitors away from meals

#41. What groups of organisms belong to the domain – eukaryotes? ? Eukaryotes have a membrane bound nucleus

Select all that apply:

Plants

Fungi

Archaea

Bacteria

Animals

Protists

#42. What are nitrogen-fixing bacteria?

Bacteria that are eaten as a source of nitrogen

Bacteria that do not need any nitrogen to survive

Bacteria that move nitrogen from the air into the soil

#43. If grass is eaten by a rabbit and a rabbit is eaten by a hawk. What level of consumer is the hawk?

Tertiary consumer

Primary consumer

Secondary consumer

#44. Which square instrument do we use for randomly sampling population sizes?

#45. The binomial name for tigers is Felis tigris. Which part of the name represents the genus?

Felis

tigris

#46. What does abundance measure?

The average size of organisms in a population

The number of individuals or frequency of occurrence in an area

The average number of different species within a community

#47. What is groundwater?

water in clouds

water stored as ice

water with ground in it

water in rocks and soil

#48. Why do plants need oxygen?

Plants need oxygen to build their cell walls

Plants also do aerobic respiration - to get energy from glucose

Plants need oxygen to process urea

#49. Which of the following plants have a mutualistic relationship with nitrogen-fixing bacteria?

Select all that apply:

Peas

Beans

Potatoes

Tomatoes

#50. Which of the following is the source of coal?

dead plankton from millions of years ago

dead and buried plant material from millions of years ago

nuclear decay from millions of years ago

#51. Which of these is an example of a parasitic relationship? 1) An insect and a flower 2) A vampire bat and a cow 3) A coral polyp and single-celled algae

3

1

2

#52. Is this relationship parasitic or mutualistic? A coral polyp (providing shelter) and single-celled algae (providing food)

Neither

Mutualistic

Parasitic

#53. Which type of factor is pollution?

Abiotic

Sub-biotic

Inbiotic

Biotic

#54. We sometimes use a transect to perform systematic sampling. This involves which of the following?

Sampling every time your reach a predefined distance, such as every 5 metres

Sampling at random

Sampling using a complex system of North, South, East and West samples combined with a random coin-flip to determine direction

#55. Which of the following is the correct word equation for aerobic respiration?

carbon dioxide + oxygen = water + energy + glucose

nitrogen dioxide + carbon dioxide = water + energy

oxygen + glucose = carbon dioxide + water + energy

#56. Which type of factor is disease?

Inbiotic

Abiotic

Sub-biotic

Biotic

#57. Which type of factor is parasitism?

Biotic

Inbiotic

Abiotic

Sub-biotic

#58. When fossil fuels are burned they release carbon into the atmosphere – which of the following are fossil fuels?

peat

nuclear fuels

wind

#59. Which of these is an example of a mutualistic relationship? 1) An insect and a flower 2) A vampire bat and a cow 3) A tick and a dog

3

2

1

#60. How do we describe the periodic changes in population size of predators and prey – explained by increases in numbers of predators due to increased numbers of prey and then decreasing numbers of prey due to increasing numbers of predators and so on?

Predator-Prey cycles

Competition-driven cyclic abundance shifts

Abiotic-Biotic cycles

GCSE OCR Combined Science A Papers 2 and 8

Good Luck!

Results

#1. Which of these processes allows saltwater to become potable?

#2. Which of these is a population?

#3. Is this relationship parasitic or mutualistic? A crocodile which lets a small bird feed on leftover meat between its teeth

#4. Producers are organisms which do what?

#5. Match the description to the correct term. All of the individuals of a species that live in a particular woodland.

#6. Why can humans only survive a few days without water?

#7. Respiration from animals is a source of carbon dioxide in the atmosphere – do plants also use respiration?

#8. Predators are essential for healthy ecosystems – what happens if predators are removed due to extinction?

#9. The water cycle has one part where water is in solid form – what is that form of storage?

#10. In mutualistic feeding relationships – which organisms benefit?

#11. Which of the following are strategies organisms use to adapt to changing abiotic conditions?

#12. Decomposers break down dead animal and plant material – what happens to the carbon inside the dead organisms?

#13. In a scientific investigation, you and two others randomly sample a rocky shore using quadrats. You find that on average there are 2 crabs per quadrat and the whole shore would be covered by 150 quadrats. Estimate how many crabs are on the whole shore.

#14. Finish the sentence: Nitrogen compounds found in artificial fertilisers are ……… and dissolve in the soil’s water.

#15. Where are nitrogen-fixing bacteria found in plants such as peas and beans?

#16. Tapeworms and ticks are examples of parasites – which of these lives inside another organism?

#17. Name two resources that both animals and plants need to survive and reproduce? ? structure your answer like this: ..... and .....

#18. By which process does water in the clouds move onto land?

#19. Where does the water in lakes and rivers end up?

#20. True or false – volcanism removes carbon from the atmosphere

#21. Why do we use systematic or random sampling of an area to determine the distribution or abundance of organisms?

#22. What do we call the process by which farmers change the crops they grow each year to maintain nitrogen in the soil?

#23. The 5 kingdoms of life are Animals, Plants, Fungi, Protists and Prokaryotes. Which kingdom do algae belong to?

#24. Which of these is an ecosystem?

#25. How can parasites affect the nutrition of their hosts?

#26. What are the three domains?

#27. How do most plants get their nitrogen?

#28. Which type of factor is nutrient availability?

#29. Why do plants need nitrogen?

#30. What do we call animals that only eat plants?

#31. What do we call animals that are eaten by other animals?

#32. True or false – plants remove carbon from the atmosphere during photosynthesis

#33. In typical feeding relationships there are two elements – what are they?

#34. Which of these substances is sometimes added to water to make it potable?

#35. Is the following statement accurate: nitrogen be can be moved back and forth from the atmosphere and into the soil by bacteria.

#36. What are abiotic factors?

#37. Which of the following is the source of oil and gas?

#38. Which type of factor is competition?

#39. What is the binomial name for humans?

#40. What is a parasite?

#41. What groups of organisms belong to the domain – eukaryotes? ? Eukaryotes have a membrane bound nucleus

#42. What are nitrogen-fixing bacteria?

#43. If grass is eaten by a rabbit and a rabbit is eaten by a hawk. What level of consumer is the hawk?

#44. Which square instrument do we use for randomly sampling population sizes?

#45. The binomial name for tigers is Felis tigris. Which part of the name represents the genus?

#46. What does abundance measure?

#47. What is groundwater?

#48. Why do plants need oxygen?

#49. Which of the following plants have a mutualistic relationship with nitrogen-fixing bacteria?

#50. Which of the following is the source of coal?

#51. Which of these is an example of a parasitic relationship? 1) An insect and a flower 2) A vampire bat and a cow 3) A coral polyp and single-celled algae

#52. Is this relationship parasitic or mutualistic? A coral polyp (providing shelter) and single-celled algae (providing food)

#53. Which type of factor is pollution?

#54. We sometimes use a transect to perform systematic sampling. This involves which of the following?

#55. Which of the following is the correct word equation for aerobic respiration?

#56. Which type of factor is disease?

#57. Which type of factor is parasitism?

#58. When fossil fuels are burned they release carbon into the atmosphere – which of the following are fossil fuels?

#59. Which of these is an example of a mutualistic relationship? 1) An insect and a flower 2) A vampire bat and a cow 3) A tick and a dog

#60. How do we describe the periodic changes in population size of predators and prey – explained by increases in numbers of predators due to increased numbers of prey and then decreasing numbers of prey due to increasing numbers of predators and so on?

Quick Links

Services

Resources