2018 8th Grade Science Test Review (Ecology, Cells, Variety of Life)

Front

What is energy in the context of food?

Back

Energy in food is the amount of fuel that the body can use to perform activities, measured in calories.

Front

What is an adaptation in ecology?

Back

An adaptation is a characteristic or trait that helps an organism survive and reproduce in its environment.

Front

How can human activities impact carbon dioxide levels in the atmosphere?

Back

Human activities, such as burning fossil fuels, increase carbon dioxide levels, while reducing these activities can help lower them.

Front

What is the difference between internal and external fertilization?

Back

Internal fertilization occurs inside the female's body, while external fertilization occurs outside, typically in water.

Front

What is a community in ecological terms?

Back

A community is a group of different species living together in the same area, interacting with each other.

Front

What is the role of photosynthesis in plants?

Back

Photosynthesis is the process by which plants convert sunlight into energy, using carbon dioxide and water.

Front

What is the function of a cell membrane?

Back

The cell membrane controls what enters and exits the cell, maintaining the internal environment.

Front

What is biodiversity?

Back

Biodiversity refers to the variety of life in a particular habitat or ecosystem, including different species and genetic variations.

Front

What is the significance of the food chain?

Back

The food chain illustrates how energy and nutrients flow through an ecosystem, showing the relationships between producers, consumers, and decomposers.

Front

What is a population in ecology?

Back

A population is a group of individuals of the same species living in a specific area.