WorksheetsLife Science Review
Total questions: 41
Worksheet time: 1hrs 11mins
What is the main purpose of photosynthesis?
To produce oxygen for animals
To convert water into nutrients
To convert sunlight into chemical energy
To absorb carbon dioxide from the atmosphere
In which part of the plant does photosynthesis primarily occur?
Roots
Stems
Leaves
Flowers
What are the primary components needed for photosynthesis to occur?
Water and soil
Sunlight and oxygen
Carbon dioxide and water
Nitrogen and phosphorus
What is an ecosystem?
A single species and its environment
A community of organisms and their physical environment
A collection of plants only
A system of non-living things only
Which of the following is an example of a consumer in an ecosystem?
Algae
Deer
Mushrooms
Grass
What is the primary energy source for ecosystems?
Water
Sunlight
Soil nutrients
Wind
Which of the following best describes a food chain?
A process by which energy is recycled in an ecosystem
A sequence of organisms each dependent on the next as a source of food
A group of animals that live together
A system of water cycles in an ecosystem
What happens to energy as it moves up the food chain?
It increases
It decreases
It stays the same
It disappears
Why are decomposers important to an ecosystem?
They produce oxygen for animals to breathe.
They consume living plants for energy.
They break down dead organisms, returning nutrients to the soil.
They capture sunlight to produce food.
Which gas is a byproduct of photosynthesis?
Nitrogen
Oxygen
Carbon dioxide
Hydrogen
What breaks down dead organisms and their waste?
Decomposers
dirt
wind
Miguel
In fall and winter many trees lose their leaves in response to cooler temperatures and ---
decrease in average wind speed
fewer hours of daylight
an increase in humidity
more direct sunlight
An organism that eats both plants & animals is called ______
carnivore
herbivore
scavenger
omnivore
An organism that feeds on dead materials is called _______
carnivore
herbivore
scavenger
omnivore
A system of interlocking food chains in an ecosystem or ecological community is called _______
food chain
food web
ecosystem
Non-living things that help sustain life in an ecosystem (i.e. dirt, temperature, rocks, water, air, sunlight) is called _______
abiotic factor
biotic factor
predator
prey
Living things that make up an ecosystem (i.e. animals, plants, and bacteria) is called _______
abiotic factor
biotic factor
predator
prey
What is this model called?
Food Chain
Food Web
Habitat
Herbivore
Bears eat fish, insects, plants, seeds, nuts and young elk. They are called __________.
Franivore
Carnivore
Herbivore
Omnivore
Lions only eat buffalo, antelopes, zebras and crocodiles. They are called __________.
Omnivore
Herbivore
Carnivore
Delivore
Is soil a biotic or abiotic factor?
biotic
abiotic
Are rocks biotic or abiotic factors?
biotic
abiotic
Abiotic factors are ___________.
non-living parts of an ecosystem
living parts of an ecosystem
things that once were alive, but now are dead
not important parts of ecosystems.
Biotic factors are ___________.
non-living parts of an ecosystem
living parts of an ecosystem
things that once were alive, but now are dead
not important parts of ecosystems.
A disease reduces the number of young salmon in a river. Which population will MOST likely increase as a result?
trout and eagle
algae and trout
sculpin and algae
Some examples of biotic factors would be
trees
insects
bacteria
all of the above
Identify the ecosystem
Forest
Tundra
Freshwater
Grassland
