6th Grade Science Leap Review #3

Front

What is DDT and how does it affect eagle populations?

Back

DDT is a pesticide that can accumulate in the food chain. Eagles absorb DDT after eating large fish, which can lead to health issues and population decline.

Front

What evidence supports the claim that tree growth was affected by dry conditions from AD 1100 to 1300?

Back

A large percentage of the west was affected by dry conditions during this period, leading to thinner tree rings.

Front

How does corn production affect the farming of domesticated turkeys?

Back

A decrease in corn production during the Great Drought decreased the domestic turkey population due to reduced food availability.

Front

What happens to the force between a skateboard and the track when a rider steps onto the skateboard?

Back

The force between the skateboard and the track increases when a rider steps onto it.

Front

What did the Anasazi rely on more as conditions changed?

Back

The Anasazi relied more on domesticated turkeys and rabbits for food as conditions changed.

Front

What is bioaccumulation?

Back

Bioaccumulation is the process by which substances, such as pesticides, accumulate in living organisms over time.

Front

Define ecosystem. Give an example.

Back

An ecosystem is a community of living organisms and their physical environment interacting as a system. Example: A forest ecosystem.

Front

What is the water cycle?

Back

The water cycle is the continuous process by which water moves from the Earth's surface to the atmosphere and back, including evaporation, condensation, and precipitation.

Front

Explain the concept of food chains and food webs.

Back

A food chain shows the direct flow of energy from one organism to another, while a food web is a complex network of interconnected food chains.

Front

What is the role of producers in an ecosystem?

Back

Producers, such as plants, convert sunlight into energy through photosynthesis, forming the base of the food chain.