Organisms and their environment | Baamboozle - Baamboozle

English 15 Public

This quiz revise the main ideas of Chapter 19 "Organisms and their environment" of the Biology IGCSE.

Study Slideshow

A food chain shows the transfer of 1._______ from one organism to the next, beginning with a 2._________, which obtains its energy from the 3. __________.

1. energy / 2.producer / 3. sun

A _____ __ ______ has levels which represent the number of each species in a food chain.

pyramid of numbers

A _______ is an organism that gets its energy from dead or waste organic.

decomposer

A _____ __ ______ has levels which represent the dry weight of species in a food chain.

pyramid of biomass

In a 1._____ _ ______, we represent the energy at each trophic level. The producers at the bottom, have the _____ amount of enery.

1. pyramid of energy / 2. greatest, largest

Identify the nutrient cycle represented on the picture and name at least 4 of its processes.

Carbon cycle. Processes:Photosynthesis, Decay, Respiration, Fossilisation, Combustion.

Identify the cycle of the picture and name its 4 main processes.

Water cycle. Processes: Evaporation, Condensation, Precipitation, Transpiration.

Name the 2 processes that ADD nitrates to the soil

1. Nitrifying bacteria 2. Nitrogen-fixing bacteria

Name the 3 processes that REMOVE nitrates from the soil.

1. Uptake by plants, 2. Leaching, 3. Denitrifying bacteria

Define the term POPULATION

A group of organisms of one species, living and interacting in the same area at the same time.

Define the term COMMUNITY

A group of different populations of different species in an ecosystem / Populations of different species

Define the term ECOSYSTEM

A biological system that contains a COMMUNITY of organisms together with non-living parts of the envirnment, interacting together.

How is the relation between the BIRTH RATE and DEATH RATE when a population increases in size?

Birth rate > death rate

Which conditions favour the population growth?

Food supply, resources, health, education...

Which factors limit the population growth?

Predation, competition for resources, famine, wars,diseases ...