Grade 7 Ecology Unit HW

Grade 7 Ecology Unit HW

by Leanna Weimer

Ecology Introduction

e·col·o·gy

/ēˈkäləjē/

Learn to pronounce

noun

the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.

Multiple Choice

The study of the interactions between organisms and their environment is:

• Ecology

• Microbiology

• Biology

• Evolution

Multiple Choice

When members of the SAME species interact with one another they form a

• population

• community

• organism

• ecosystem

Multiple Choice

All living things in a given area, living and non-living.

• Ecosystem

• Biotic

• Community

• Species

Multiple Choice

The rabbits and squirrels in an area are a part of the same

• population

• community

Multiple Choice

Groups of rabbits that live in the same area make up a

• species

• population

Multiple Choice

Which of the following has the levels of organization in order from smallest to largest?

• Biosphere, Ecosystem, Community, Population, Species, Organism

• Organism, Species, Community, Ecosystem, Biosphere

• Organism, Species, Community, Population, Ecosystem, Biosphere

• Biosphere, Ecosystem, Community, Population, Organism, Species

Multiple Choice

The non-living parts of the environment such as rocks, air, temperature, sunlight, and water

• Abiotic

• Biotic

• Habitat

• Community

Multiple Choice

The living or once living organisms in an ecosystem

• Biology

• Abiotic

• Biotic

• Ecology

Review of Biotic vs. Abiotic

Multiple Select

Below is a list of factors in an ecosystem. Select all the abiotic factors.

• Shelter

• Water

• Protists

• Sunlight

• Prokaryotes

Multiple Choice

Which of the following scenario best describes an ecosystem?

• A pack of wolves that live in the same area

• A single protist

• Rabbits hopping around trees burrowing through soil

• Birds, mice, and trees inhabiting the same area

Multiple Choice

The most important abiotic factors when studying biomes are...

• Food and Water

• Water and Sunlight

• Temperature and Oxygen

• Water and Temperature

Multiple Choice

Which biome is characterized by low temperatures and low amounts of rainfall?

• tundra

• desert

• temperate deciduous forest

• tropical rain forest

Multiple Choice

Which biome receives between 0 to 25 centimeters of rain per year, has a temperature range of 0 to 50 degrees Celsius, has poor soil, and is home to lizards, scorpions, and snakes?

• desert
• mountain
• taiga
• tundra

Multiple Choice

Which biome, because of its climate, has the largest number of species of plants and animals?

• tundra
• desert
• tropical rainforest
• pine forest

Multiple Choice

How do consumers get their energy?

• laying in the sun

• eating other organisms

• providing food for other organisms

• surviving in an ecosystem

Multiple Choice

True or False. In this energy pyramid, the consumers on each level only get about 10 percent of energy that the trophic level before it has stored.

• True

• False

Multiple Choice

What might happen if you remove a primary consumer from the ecosystem?

• There would be more food for secondary consumers.

• The number of primary consumers would increase.

• The number of plants would increase.

• The number of secondary consumers would increase.

Multiple Choice

If a disease destroying barley plants in a field swept through an ecosystem, what would happen to the barley eating bird population in the the field ?

• The bird population would stay the same
• The bird population would infinitely increase
• The bird population would decrease

Multiple Choice

In this energy pyramid, what is the proper name for ANY ORGANISM ABOVE THE PRODUCER LEVEL?

• decomposers

• consumers

• producers

• omnivores

Water Cycle

• Precipitation - when water falls from the sky

• Runoff - when water runs off the surface and ends up in lakes/ponds/rivers, etc.

• Seepage - when water seeps into the ground and becomes groundwater

• Evaporation - when water heats up and turns into a gas form

• Transpiration - when water evaporates from the plants of leaves

• Condensation - when water vapor cools down and turns into clouds

Multiple Choice

When warm, evaporated air rises, it cools and begins to turn into liquid again. This part of the water cycle is called:

• a: transpiration

• b: precipitation

• c: runoff

• d: condensation

Multiple Choice

Which term best describes a change of state from a liquid to a gas caused by the sun's energy?

• evaporation

• sublimation

• deposition

• precipitation

Multiple Choice

The process of plants losing water through their leaves is called ____.

• condensation

• evaporation

• transpiration

• exhaling

Carbon Cycle

• Photosynthesis - how the carbon comes to earth from the atmosphere

• Cellular respiration - how the carbon is released from plants/animals back into the atmosphere

• Combustion - when carbon is released into the atmosphere by factories/cars

• Decomposition - when carbon is released atmosphere by dead plants/animals... some is turned into fossil fuels to be burnt later

Multiple Choice

What is the only way that carbon (CO2) goes from the atmosphere to living organisms?

• photosynthesis

• respiration

• decomposition

• combustion

Nitrogen Cycle

• About 78% of the earth's atmosphere is nitrogen gas.

• Plants and animals must have nitrogen to make proteins and nucleic acids.

• However, the nitrogen gas is not usable by plants or animals - so the nitrogen cycle must happen to change nitrogen into a usable form through a series of steps.

• Most of this is done using bacteria & decomposers; however, some nitrogen enters the soil via lightning.

Nitrogen Cycle

• Nitrogen fixation: the process when nitrogen-fixing bacteria in the soil/on plant roots change nitrogen gas into ammonia

• Ammonification: the process when decomposers break down dead stuff/animal wastes into ammonium

• Nitrification: the process when nitrifying bacteria change ammonium into nitrates, which is what plants can use

• Assimilation: when the plants take in the nitrates

• Denitrification: when denitrifying bacteria take the excess nitrates and turn it back into nitrogen gas

Multiple Choice

the process when decomposers break down dead stuff/animal wastes into ammonium

• Ammonification

• Denitrification

• Nitrification

• Nitrogen fixation

Multiple Choice

the process when nitrifying bacteria change ammonium into nitrates, which is what plants can use

• Ammonification

• Denitrification

• Nitrification

• Nitrogen fixation

Multiple Choice

the process when nitrogen-fixing bacteria in the soil/on plant roots change nitrogen gas into ammonia

• Ammonification

• Denitrification

• Nitrification

• Nitrogen fixation

Multiple Choice

when denitrifying bacteria take the excess nitrates and turn it back into nitrogen gas

• Ammonification

• Denitrification

• Nitrification

• Nitrogen fixation

Phosphorus Cycle

• This is the only cycle without an atmospheric portion.

• Phosphate is released via the weathering of rocks.

• Plants & some fungi take up phosphorus.

• Phosphorus moves from producers to consumers via the food web.

• Phosphorus is released back into the soil when organisms die & decomposers break them down.

• Phosphorus gets into water via runoff and leaching from the groundwater.

• Mining and agricultural runoff add to the phosphorus in the environment.

Multiple Choice

There is no portion of the phosphorus cycle in the...

• atmosphere

• rocks

• water

• living organisms

Succession​

​

Ecological Succession

Multiple Choice

Which type of succession occurs on freshly formed on barren land?

• Primary Succession

• Secondary Succession

Multiple Choice

Which of the following is something that can create new land?

• Snow

• Rain

• Volcanic Eruption

• Wind

Multiple Choice

What do we call the first species that colonize a new area?

• Foreign Species

• Pioneer Species

• Intraspecies

• Interspecies

Primary Succession

• Lichens and moss (pioneer species) appear

• Erosion breaks rocks apart into smaller pieces and decomposition of pioneer species adds nutrients to the ground (soil formation)

• Small annuals (plants) start to appear

• Grasses and ferns (perennials) appear

• Shrubs and bushes appear

• Softwoods such as conifers (trees with cones) appear

• Hardwoods such as oak, maple, hickory, walnut, and cherry trees

Primary Succession

Multiple Select

Which of the following are examples of pioneer species? (select all that apply)

• Maple Tree

• Grass

• Lichens

• Moss

Multiple Choice

Which of the following appears last?

• Grass

• Bushes

• Softwoods (conifers)

• Hardwoods (Maple, Oak, etc)

Secondary Succession

Process in which recolonization of plants occurs after some kind of natural disaster such as a forest fire.

Quicker than primary succession since the soil still remains.

Multiple Choice

Which type of succession occurs after some kind of natural disaster wipes out most of the vegetation in a habitat?

• Primary Succession

• Secondary Succession

Multiple Choice

Which type of succession is quicker?

• Primary Sucession

• Secondary Succession