our environment

When is World Environment Day is celebrated?

• 5 February

• 5 August

• 5 June

• 5 may

Which of the following is a primary consumer in a grassland ecosystem?

• 
• 
• 
• 

What percentage of energy is passed on to next tropic level?

• 10%

• 50%

• 90%

• 100%

What is this called?

• Food Web

• Food Chain

• Abiotic Factors

• Biotic factors

Which organism recieves the least amount of energy from the producer?

• Owl

• Grasshopper

• Lilypad

• Mouse

The largest group of organisms found in a food web would be:

• Primary Consumers
• Producers
• Decomposers
• Tertiary Consumers

The phenomenon by which toxins concentrate in the organisms at higher trophic levels within an ecosystem is known as...

• Biotoxicity

• Biomagnification

• Eutrophication

• Predation

Consider the following food chain:

Algae > Mayfly > Minnow > Trout

In a polluted ecosystem, which organism is likely to have the HIGHEST level of toxic chemicals in its body?

• Algae

• Mayfly

• Minnow

• Trout

What does the Ozone in the atmosphere do?

• causes the greenhouse effect

• causes acid rain

• protects the Earth from harmful infrared (IR) rays

• protects the Earth from harmful ultraviolet (UV) rays

What damage can UV rays cause?

• can cause sunburn.

• can cause some types of skin cancer.

• cataracts.

• all of the above