7th Grade Semester Exam Review

Front

What percentage of energy is typically passed on to the next level in a food web?

Back

10%

Front

What is agitation in a scientific context?

Back

Agitation refers to the act of stirring or shaking a substance to mix it or increase its temperature.

Front

Why do different species of birds have different shaped beaks?

Back

Different shaped beaks allow birds to eat the food readily available in their environment.

Front

What is the basic unit of life?

Back

Cell

Front

What is a tissue?

Back

A group of similar cells that work together to perform a specific function.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is the role of producers in a food web?

Back

Producers, like plants, convert sunlight into energy through photosynthesis, forming the base of the food web.

Front

What is the difference between a food chain and a food web?

Back

A food chain is a linear sequence of organisms where each is eaten by the next, while a food web is a complex network of interconnected food chains.

Front

What is the significance of biodiversity in an ecosystem?

Back

Biodiversity increases resilience, stability, and productivity of ecosystems.