Definition: Moon phases describe the different appearances of the Moon as seen from Earth during its orbital cycle.

Example: A Full Moon occurs when the entire visible surface is illuminated, while a New Moon represents complete darkness.

Highlight: The terms Waxing and Waning describe the Moon becoming brighter and darker respectively.

Vocabulary: Gibbous refers to when more than half of the moon is illuminated, while Crescent describes less than half being illuminated.

Definition: A food chain represents the linear transfer of energy from one organism to another in an ecosystem.

Example: In a typical food chain, plants (producers) capture solar energy, which is then transferred to primary consumers, secondary consumers, and so on.

Highlight: Only approximately 10% of energy transfers between each trophic level, demonstrating how is energy lost in a food chain.

Vocabulary: Producers are organisms that create their own energy through photosynthesis.

Definition: Evolution is the change in inherited traits within a population over multiple generations.

Example: Natural selection occurs when environmental conditions favor certain traits, leading to their increased prevalence in subsequent generations.

Highlight: DNA contains four nucleotide bases (Adenine, Guanine, Thymine, and Cytosine) that pair specifically to form genetic code.

Vocabulary: Genetic variation refers to the diversity of traits within a population, essential for evolution to occur.

Definition: The Earth's axis is an imaginary line running through the planet's poles, around which it rotates.

Example: During winter months in the Northern Hemisphere, the axis points away from the sun, resulting in colder temperatures.

Highlight: The visibility and position of constellations and their appearance chart changes throughout the year, with notable examples including Orion, Leo, Gemini, and Ursa Minor.

Vocabulary: Constellations are groups of stars that form recognizable patterns in the night sky.