Biosphere Test Flashcards

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1
Q

Why is the water Cycle so important? And how does the water Cycle work?

A

All living things need to survive, and water molecules enter the atmosphere as water vapor when they evaporate from the ocean or other bodies of water.

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2
Q

If algae is at the beginning of the food chain is is known as the

A

Producer

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3
Q

If you are an ecologist and you are counting the population number of a certain species in a given area, which inquiry method are you using?

A

Observation

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4
Q

A snake that eats a frog that had eaten an insect that fed on a plant is a

A

Tertiary consumer

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5
Q

Define biomass.

A

Total amount of living tissue within a given tropic level.

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6
Q

As only 10% of the energy is stored in organisms is passed on to the next trophic level, some of the remaining energy is used for life’s processes and the rest is what?

A

Eliminated heat

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7
Q

List the processes in the carbon cycle.

A

Photosynthesis, cellular respiration, and decomposition.

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8
Q

Green plants are

A

Producers

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9
Q

Deer are

A

Primary consumer

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10
Q

Nitrogen fixation is carried out primarily by what?

A

Bacteria

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11
Q

Why do organisms need nutrients?

A

To build tissue and carry out life essential functions.

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12
Q

Water can enter the atmosphere through the processes of?

A

Evaporation and transpiration

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13
Q

Living organisms require nitrogen to make __________,which are used to build proteins.

A

Amino acids

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14
Q

What do scientists classify the nitrogen, carbon and water cycles as?

A

Biogeochemical cycles

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15
Q

Plant-eating cows are called ________

A

Herbivores

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16
Q

Th chemical substances that an organisms require to live are called what?

A

Nutrients

17
Q

What is the process by which bacteria converts nitrogen gas in the air to ammonia?

A

Nitrogen fixation

18
Q

What is nitrogen fixation carried out primarily by?

A

Bacteria.

19
Q

The chemical substances that an organisms requires to live are called what?

A

Nutrients

20
Q

Explain the role of Algae in ocean food chains.

A

Algae is an autograph and in this particular case it’s going to be the primary producer at the base of the food chain.

21
Q

Describe three basic processes of ecological research and explain them.

A

Observation: the first step in making an experiment and a model. It asks ecological questions.
Experimenting: can be used to test hypotheses.
Modeling: ecologists make models to gain insight into complex phenomena such as the effects of global warming.

22
Q

What are some of the similarities between the carbon cycle and the nitrogen cycle?

A

They are both the most abundant in the atmosphere and they both involve plants to transfer the nutrients.

23
Q

Plant-eating cows are called?

A

Herbivores

24
Q

The chemical substances that an organisms requires do love are called?

A

Nutrients

25
Q

How might a large input of Phosphorus affect a freshwater lake over time?

A

Algal bloom happens when a result in an immediate increase in the amount of algae and other producers occur in a body of water.

26
Q

The repeated movement of water between Earth’s surface and the atmosphere is called?

A

The water Cycle

27
Q

Nitrogen fixation is carried out primarily be?

A

Bacteria

28
Q

What are the different levels of the biosphere, from smallest to largest?

A

Individual, population, community, ecosystem, biome, and biosphere.

29
Q

What is meant by nutrient limitation?

A

When a nutrient is in short supply it will limit an organisms growth. When an ecosystem is limited by a song.d nutrient that is scarce or cycles very slowly, this substance is called limiting nutrient.

30
Q

Why do algal blooms occur?

A

When there is not enough consumer to eat the excess algae, conditions can become so favorable for growth that algae cover the surface of the water.