7th Grade Life Science Review

An organism that makes its own food using sunlight is a __________.

Answer explanation

An organism that makes its own food using sunlight is called a producer. Producers, like plants, use photosynthesis to convert sunlight into energy, making them essential for the ecosystem.

Animals that eat plants are called __________.

Answer explanation

Animals that eat plants are called herbivores. This term specifically refers to organisms that primarily consume plant material for their nutrition.

Animals that eat other animals are called __________.

Answer explanation

Animals that eat other animals are called carnivores. This term specifically refers to organisms that primarily consume meat, distinguishing them from herbivores, which eat plants.

Organisms that break down dead plants and animals are called __________.

Answer explanation

Organisms that break down dead plants and animals are called decomposers. They play a crucial role in the ecosystem by recycling nutrients back into the soil.

A series of steps showing how energy moves from one organism to another is a __________.

Answer explanation

A food chain illustrates how energy is transferred from one organism to another, starting from producers to various levels of consumers. This sequence highlights the flow of energy through different trophic levels.

A __________ shows many overlapping food chains in an ecosystem.

Answer explanation

A food web illustrates the complex interconnections between various food chains in an ecosystem, showing how different species interact through feeding relationships.

A __________ pyramid shows the loss of energy at each level of a food chain.

Answer explanation

A Energy pyramid illustrates how energy decreases at each trophic level in a food chain, showing that only a fraction of energy is transferred from one level to the next.

The process that cycles water between Earth's surface and atmosphere is the __________ cycle.

Answer explanation

The process that cycles water between Earth's surface and atmosphere is known as the Water cycle. It involves evaporation, condensation, and precipitation, continuously moving water through different states and locations.

The __________ cycle moves carbon through living things, the atmosphere, and Earth.

Answer explanation

The correct answer is 'Carbon' because the carbon cycle is the process that moves carbon through living organisms, the atmosphere, and the Earth's systems, playing a crucial role in maintaining ecological balance.

Nitrogen enters the soil through a process called __________ fixation.

Answer explanation

Nitrogen enters the soil through a process called nitrogen fixation. This process involves the conversion of atmospheric nitrogen into a form that plants can use, primarily facilitated by certain bacteria.