2024 Final Science Exam

A food chain is a linear sequence that shows how energy and nutrients flow from one organism to another in an ecosystem, starting from producers to various levels of consumers.

Producers are organisms, like plants, that create their own food through photosynthesis and form the base of the food chain.

Consumers are organisms that eat other organisms for energy. They can be herbivores (plant-eaters), carnivores (meat-eaters), or omnivores (both).

Decomposers break down dead organic matter, returning nutrients to the soil and completing the nutrient cycle.

A food chain is a simple linear pathway of energy flow, while a food web is a complex network of interconnected food chains.

Periods are the horizontal rows in the periodic table that indicate the number of electron shells in the elements.

Groups are the vertical columns in the periodic table that contain elements with similar chemical properties.

Metalloids are elements that have properties of both metals and non-metals, found along the zig-zag line in the periodic table.

A compound is a substance formed when two or more elements chemically bond together, such as carbon dioxide (CO2).

An element is a pure substance that cannot be broken down into simpler substances by chemical means, such as oxygen or iron.