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Name: ______________________ Class: _________________ Date: _________
Risk Science #1 Questions
True/False
Indicate whether the statement is true or false.
____ A microscopic amoeba and a giant squid have nothing in common.
____ Cells come from other cells.
____ No more than 1,000 organisms have been identified.
____ Most organisms are made of more than one cell.
____ Mitochondria supply energy for cells.
____ A food chain models how food energy is transferred.
____ In a community of plants and animals, there are also bacteria,
protists, and fungi.
____ Animals that eat other animals are called herbivores.
____ Scavengers are not part of a food chain.
____ A predator hunts other animals for food.
____ A parasite lives in or on a host organism.
____ Plants can make their own food using carbon dioxide, water, and
sunlight.
____ In photosynthesis, oxygen is a waste product.
____ In plants, stomata carry water to the leaves in a tissue.
____ A leaf is made of xylem and phloem tissues.
____ Respiration and photosynthesis are opposite of each other.
____ You can tell the age of a tree by the rings inside of it.
____ Ecosystems cannot be changed by humans.
____ A sudden explosive growth of a single-celled algae is called a
red tide.
____ Acid rain occurs when air pollution mixes with moisture in the
atmosphere.
Yes/No
Indicate whether you agree with the statement.
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Is the parasite the smallest unit of living matter?
Do multicellular organisms include frogs, trees, and humans?
Do white blood cells carry oxygen?
Is fresh air considered an abiotic factor?
Does an ecosystem only include one population?
Does the energy in a food chain come from cells?
Are crabs considered to be a scavengers?
Do symbiotic relationships gain from each other?
In Africa, can a parasite cause sleeping sickness?
Do guard cells open and close the stomata when they need air?
Are plant cells found on the top of a leaf?
____ Have scientists created a chemical equation to express what
happens in photosynthesis?
____ Can carbohydrates be stored as food?
____ The oxygen that animals breathe in comes from plants. Do plants
use the oxygen after photosynthesis?
____ During cellular respiration, is carbon dioxide released back into
the air?
____ At the ascending level of an energy pyramid, are there more
organisms available than at the level below?
____ Are there yearly rings in a tree?
____ Are there only a few species predicted to become extinct?
____ Does an organism’s habitat affect its survival?
____ Can it only take a year for a climax community to form?
Matching
Match each item to the correct description below.
predator nucleus
mutualism population
parasitism community
photosynthesis food chain
food web stomata
energy pyramid cellular respiration
pollution extinct species
chlorophyll endangered species
cell membrane threatened species
cytoplasm primary succession
____ all members of a single species
____ a harmful change to the natural environment
____ a diagram that shows the amount of energy available at each level
of an ecosystem
____ food-making process in plants and some unicellular organisms
____ an animal that hunts other animals for food
____ organisms that use oxygen to break down sugars
____ symbiotic relationship in which one organism benefits and the
other is harmed
____ a gel-like substance inside a cell membrane
____ a symbiotic relationship that benefits both organisms
____ tiny pores that carry out photosynthesis
____ a path that energy and nutrients follow in an ecosystem
____ the green substance that is able to use that energy in sunlight
____ the last member of a species dies
____ this is a cell’s control center
____ all living things in an ecosystem
____ species with low numbers
____ a layer around the outside of the cell
____ when a species is in danger of becoming extinct
____ the overlapping food chains in an ecosystem
____ takes place in a community where few, if any, living things exist
Short Answer
Animals that hunt other animals are called _____.
A gel-like substance called _____ occupies a region from the nucleus
to the cell membrane.
_____ are tiny power plants that break down food.
In plant cells, the _____ stores water and provides support.
Many plant cells are green because of the chlorophyll in their _____.
In addition to plants and animals, a community can have also bacteria,
protists, and _____.
A food web is just several _____ put together.
Food _____ model the feeding relationship between organisms in an
ecosystem.
When a plant has plenty of water, the _____ cells swell and pull the
stomata open.
When plant or animal cells need energy, they can get it from stored
_____.
At each level of an ecosystem, a(n) _____ shows the amount of energy
available.
All ecosystems are in a constant state of _____.
How many oxygen atoms are needed to start the photosynthesis reaction?
6CO2 + 6H2O + energy . C6H12O6 + 6O2
_____ is happening when vehicles emit gases and allow oil to leak to
the ground.
The easiest way to remove minerals from the ground is _____.
Three areas that pollution can alter the Earth are air, water, and
_____.
What are the three Rs?
When materials _____ in the soil, they create thicker and richer soil.
People with respiratory conditions, such as _____, often have
breathing problems when levels of air
pollution are high.
A _____ succession is the beginning of a new community where one had
previously existed.