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Energy Loss in Food Chains
A predator is usually found at the top of a pyramid of biomass.

Energy Loss in Food Chains

This Biology quiz is called 'Energy Loss in Food Chains' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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This middle school Biology quiz is all about food chains and the loss of both energy and biomass that occurs at each stage - from producers to primary and secondary consumers. A food chain shows how the organisms in a particular habitat depend on each other as a source of food. At the start of any food chain is a producer which is normally a green plant. It is called a producer because it produces its own energy and food from raw materials it finds in its surroundings.

1.
Which of the following statements about energy is true?
Energy is only ever created
Energy is only ever destroyed
Energy is only ever converted
Energy is only ever killed
This is the Conservation of Energy principle. All of the original energy of a food chain is still there but some of it has been spread out into the environment and is no longer available to the organisms of the food chain
2.
Which type of organism is usually found at the top of a pyramid of biomass?
Herbivore
Predator
Producer
Primary consumer
Predators are always found at the top of the energy pyramid and plants are always at the bottom
3.
Which of the following is not a way in which energy is lost from animals in a food chain?
Movement such as flying or running
Inedible parts of the prey
Urine and feces
Photosynthesis
Photosynthesis occurs only in plants
4.
What happens to the biomass at each successive stage in a food chain?
It is increased
It remains the same
It is reduced
It is all lost
Not all of the biomass eaten as food remains in the consumer's body. Some is lost through excretion and respiration
5.
Which process in green plants traps sunlight energy?
Photosynthesis
Reproduction
Respiration
Excretion
This is done by the chlorophyll
6.
The producer is usually what type of organism?
A fungus
An animal
A plant
A bacterium
Chlorophyll in plant cells uses the energy from sunlight to convert carbon dioxide and water into glucose. This process, photosynthesis, also releases oxygen into the atmosphere
7.
How is most energy in food chains lost?
Energy in food chains is mainly lost due to death and decay
Energy in food chains is mainly lost due to respiration and excretion
Energy in food chains is mainly lost due to reproduction and breathing
Energy in food chains is mainly lost due to reflection and transmission
The energy and biomass lost from a food chain by death and decay is recycled by the decomposers
8.
Energy for all food chains comes from what source?
Sun
Moon
Producer
Consumer
All energy for living things comes from the Sun. Plants trap this energy and use it to make food which provides energy for animals
9.
Energy in which form is lost to the surroundings in a food chain?
Light
Dark
Heat
Water
Ultimately, all energy conversions result in heat
10.
Which of the following statements about algae in a food chain is true?
Algae are always the primary consumer
Algae are always the secondary consumer
Algae are always the producer
Algae are always the predator
Algae are found almost everywhere on Earth and are the producer for many marine and freshwater food chains. It is said that 70% of the oxygen in the atmosphere is produced by algae
Author:  Donna Maria Davidson

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