WorksheetsMicroorganisms and DDT Quiz
Total questions: 30
Worksheet time: 15mins
Microorganisms that break down dead organisms are called:
Predators
Producers
Decomposers
Herbivores
The process of breaking down organic matter by microorganisms is called:
Respiration
Photosynthesis
Decay
Fermentation
Which of the following is organic matter?
Plastic
Rock
Bread
Metal
Mould on bread is an example of:
Bacteria
Microscopic fungi
Viruses
Protozoa
The apple becomes brown and soft due to:
Freezing
Decay by microorganisms
Drying
Salty water
Decomposers help return ______ to the soil:
Water
Nutrients
Heat
Light
Decay happens fastest in:
Low oxygen
Cold places
Warm places
Dry places
In the bread experiment, the bread in the warm place:
Moulds faster
Moulds slower
Never moulds
Stays fresh
The variable changed in the temperature experiment was:
Type of bread
Time
Temperature
Size of plates
A fair test means:
Changing everything
Copying others' results
Guessing results
Changing one variable and keeping others same
Arrows in food chains show:
Direction of water flow
Who is biggest
Direction of energy flow
Movement of animals
Decomposers are:
Producers
Consumers
Parasites
Only animals
Without decomposers, dead bodies and waste would:
Disappear quickly
Build up everywhere
Not exist
Turn into plants
Nutrients from decomposition are used by:
Rocks
Stars
Plants
Clouds
Which of the following is mostly responsible for decomposition?
Mammals
Birds
Bacteria and fungi
Fish
A toadstool is a fungus but not a microorganism because:
It is harmful
It doesn’t grow
It can be seen without microscope
It is not alive
If a slug eats a fungus, the energy originally came from:
The sun → plants → fungus → slug
The soil
The slug
Air
In a food web, decomposers feed on:
Only producers
Only consumers
All organisms after they die
Only herbivores
The main role of microorganisms in food chains is:
Produce light
Make oxygen
Recycle nutrients
Eat everything alive
Decomposers get their energy from:
Sun directly
Stars
Dead organisms and waste
Rainwater
Malaria is caused by:
Virus
Bacteria
Worm
Protozoan
Malaria is spread by:
Birds
Humans
Mosquitoes
Plants
Which organization supports the continued use of DDT to save lives?
WHO
WWF
NASA
UNESCO
DDT affects birds of prey by:
Making feathers fall
Making eggshells thin
Killing chicks after hatching
Making nests disappear
Where is DDT sprayed to kill mosquitoes?
Inside houses
In the ocean
On mountains
In snowfields
Most deaths from malaria are in children under:
1 year
5 years
15 years
50 years
DDT is harmful because it:
Breaks down quickly
Is persistent and stays in the environment
Only harms humans
Turns into clean water
Which type of country mostly uses DDT now?
Very cold countries
Tropical and subtropical countries
Desert countries
Europe
Bed nets help by:
Keeping houses warm
Preventing mosquito bites
Feeding insects
Trapping sunlight
Which statement is true about malaria vaccines?
Work 100%
Only need one injection
Reduce risk but not fully effective
Available everywhere for free
