Solar System
This planet is the closest to the sun
Mercury
The Earth spins once every 24 hours, causing this daily cycle.
Day and Night
The Sun is a medium-sized star of this color type.
Yellow
The first person to walk on the Moon in 1969.
Neil Armstrong
The careful watching and recording of what you see during an experiment is called an ____.
Observation
The “Red Planet” is known for its dusty surface and iron-rich soil.
The Moon’s changing appearance in the sky over about a month is called the Moon’s ____.
Phases
The name of the galaxy that our solar system belongs to.
Milky Way
The name of the first artificial satellite launched by humans.
Sputnik
A testable idea or prediction made before an experiment begins.
Hypothesis
This planet is famous for its beautiful rings.
Saturn
When the Moon passes between the Sun and Earth, blocking the Sun’s light, it’s called a ____.
Solar Eclipse
A group of stars that forms a pattern in the sky is called a ____.
Constellation
This reusable spacecraft carried astronauts to space between 1981 and 2011.
Space Shuttle
When scientists use a smaller version of something (like a foam ball solar system), it’s called a ____.
Model
This dwarf planet was once considered the ninth planet in our solar system.
Pluto
Earth’s tilt and orbit around the Sun cause these natural divisions of the year.
A massive explosion that happens when a large star dies is called a ____.
Supernova
The space telescope that has helped us see distant galaxies since 1990.
The Hubble Space Telescope
Scientists use this tool to look at stars and planets far away.
Telescope
The four planets closest to the Sun are called this type of planet.
Terrestrial (rocky) planets
The same side of the Moon always faces Earth because the Moon is ____ locked.
Tidally
A region in space where gravity is so strong that not even light can escape.
Black Hole
The Canadian astronaut who became famous for singing and playing guitar on the ISS.
Chris Hadfield
When conducting an experiment, the factor that changes on purpose is called the ____.
Independent Variable