Earth's Moon and Seasons
Gravity and Planetary Orbits
The Moon, Tides, and Eclipses
Objects in the Solar System
Space Tools and Models
100

What motion of Earth on its axis causes the daily cycle of day changing into night?

What is Earth's rotation?

100

 Towards which celestial body is the gravitational pull on an orbiting satellite directed?

What is towards the larger object? 

AKA the Moon is pulled towards the Earth

100

What celestial body exerts the primary gravitational force responsible for ocean tides on Earth?  

What is the Moon?  

100

What type of space object is composed mainly of ice, dust, and rock, and forms a visible tail when near the Sun?

What is a comet?

100

What optical instrument allowed early astronomers to prove that Earth was not the center of the solar system?

What is the telescope?

200

 How long does it take for Earth to complete one full revolution around the Sun?  

What is approximately 365 days (or one year)?

200

 How does increasing the distance between two objects affect the gravitational force between them?  

What is it decreases the gravitational force? 

200

 About how frequently is a full moon visible from Earth?

What is once a month (approx. every 29.5 days)?

200

What classification is given to large outer planets (like Jupiter) that are composed mostly of gases?

What are Jovian planets (or Gas Giants)?

200

What space telescope measures small dips in a star's brightness to detect exoplanets outside our solar system?

What is the Kepler Space Telescope

300

What is the main cause of changing seasons on Earth?

What is Earth's axial tilt as it revolves around the Sun?

300

If two objects keep the same distance, what variable must increase for the force of gravity between them to become stronger?

What is their mass?

300

What moon phase occurs when the Moon is directly between the Earth and the Sun?

What is a New Moon?

300

What term describes a streak of light caused by a small piece of rock burning up in Earth's atmosphere?

What is a meteor (or "shooting star")?

300

Why has the scientific model of the solar system changed from Earth-centered to Sun-centered over time

What is because new technological tools allowed scientists to gather new evidence and observations?

400

When the Northern Hemisphere is tilted away from the Sun and receiving less direct sunlight, what season is occurring in the Southern Hemisphere?

What is summer?

400

Why does an outer planet like Uranus take significantly longer to complete an orbit around the Sun than an inner planet like Mars?

What is because its orbit path is longer/farther from the Sun?

400

 What type of eclipse occurs when the Earth passes directly between the Sun and Moon, casting its shadow on the Moon?  

What is a lunar eclipse?

400

How do dwarf planets differ from regular planets in terms of their orbits?  

What is they have not cleared their orbital path/neighborhood of other objects?  

400

What technology has allowed scientists to map planetary surfaces in high detail without sending human astronauts?  

What are robotic spacecraft / probes?

500

What 4 major characteristics of Earth make it unique among planets for supporting life as we know it?

What is water in all 3 states, distance from the sun, composition of rock and water, and a suitable atmosphere?

500

What is the general shape of planetary orbits around the Sun in our solar system?  

What is an ellipse (or elliptical)?

500

 During which two moon phases do the extreme high and low tides (spring tides) occur?

What are the New Moon and Full Moon phases?

500

What separates the inner terrestrial planets from the outer gas giant planets in our solar system?

What is the Asteroid Belt?

500

In a scale model of the solar system where the Sun is a basketball, which object best represents Earth: a grain of sand, a pebble, or a marble?

What is a small pebble?

M
e
n
u