4.1 Flashcard Review

Front

Which solar system model places the earth at the center?

Back

Geocentric model: A model of the solar system where Earth is at the center, and all other celestial bodies orbit around it.

Front

What are the two Earth processes that have erased many of Earth’s impact craters?

Back

Erosion and weathering: Natural processes that break down rocks and transport materials, leading to the alteration of the Earth's surface.

Front

What is the first step in the formation of the solar system?

Back

Nebula collapse: The process where a cloud of gas and dust in space collapses under its own gravity, leading to the formation of stars and planets.

Front

What shape are planetary orbits?

Back

Elliptical: The orbits of planets around the sun are not perfect circles but rather elongated shapes called ellipses.

Front

What is an independent variable in a scientific experiment?

Back

The variable that is changed or altered in an experiment to observe its effect on the dependent variable.

Front

What is the heliocentric model?

Back

Heliocentric model: A model of the solar system where the Sun is at the center, and the planets, including Earth, orbit around it.

Front

Define erosion.

Back

Erosion: The process by which soil and rock are removed from the Earth's surface by natural forces such as wind or water.

Front

What is weathering?

Back

Weathering: The breakdown of rocks and minerals at the Earth's surface due to environmental factors like temperature changes, water, and biological activity.

Front

What is a nebula?

Back

Nebula: A giant cloud of gas and dust in space, often the birthplace of stars and planets.

Front

What is the significance of the elliptical shape of orbits?

Back

The elliptical shape of orbits explains the varying distances of planets from the sun, affecting their speed and seasons.