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High School: 9th and 10th Grade
Biology
Biology - Waste Management
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Q.1
How do microorganisms cause decay?
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They release enzymes which break down the dead material
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They release hormones that break down the dead material
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They engulf the dead material piece by piece
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They use their vacuoles as miniature mouths
Q.2
Which of the following methods of packaging does not break down naturally?
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A plastic bag
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A large envelope made from card
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Tissue paper used to protect delicate items in a box
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A cotton bag
Q.3
Many local authorities run garden waste composting schemes. Which of the following is an advantage of this?
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Large branches of trees in the waste need to be cut into much smaller pieces
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It reduces the amount of waste sent to landfill sites
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It recycles nutrients that would otherwise be lost
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The compost can be sold cheaply to local gardeners
Q.4
Which word correctly describes something that can be broken down by the microorganisms that cause decay?
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Biodecayable
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Biodegradeable
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Biodestroyable
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Biodestructable
Q.5
Why do living things take things from their environment?
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They are parasites
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For growth and other life processes
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They are saprophyes
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To give them more room for living
Q.6
How does nature recycle dead and waste materials?
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Decay
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Dissolving
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Melting
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Freezing
Q.7
Gardeners will 'turn' their compost regularly. This involves using a garden fork to bring the compost from the bottom of the pile to the top. Which of the following is the scientific reason for doing this?
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They were taught to do it by their parents
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So that the worms in the compost can get more light
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To get more air into the compost
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Organic materials decay better in the dark
Q.8
Which of the following makes things decay?
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Woodlice
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Worms
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Bacteria and fungi
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Viruses
Q.9
Some students carried out an experiment to investigate the rate of decay of a potato. Below are just four of the experiments they tried. In which one would the potato decay fastest?
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Large pieces in a dry sealed container in warm conditions
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Small pieces in an open container in warm conditions and sprayed with water each day
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Large pieces in a dry sealed container in a refrigerator
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Small pieces in a dry sealed container in a refrigerator
Q.10
In what form can these materials be returned to the environment?
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As droppings
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As carbon dioxide
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As dead bodies
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All of the above
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