Earth's Tilt
What is the degree of the Earth’s tilt on its axis?
What is 23.5 degrees?
How long does it take Earth to make one complete rotation on its axis?
What is 24 hours (or one day)?
How long does it take the Moon to make one complete revolution around Earth?
What is about 27.3 days?
What causes tides on Earth?
What is the Moon’s gravitational pull on Earth’s oceans?
What are the 4 main states of matter?
What are solid, liquid, gas, and plasma?
What does Earth’s tilt, combined with its revolution around the Sun, cause?
What are the seasons?
How long does it take Earth to make one complete revolution around the Sun? (EXACT)
What is 365¼ days?
What causes the different phases of the Moon that we see from Earth?
What is the Moon’s revolution around Earth, which changes how much of the lit side we can see?
How many high tides and low tides does most coastal area experience in one day?
What are two high tides and two low tides each day (4 total)?
What force pulls objects toward the center of the Earth?
What is gravity?
During summer in the Northern Hemisphere, which way is the North Pole tilted?
What is toward the Sun?
What causes day and night on Earth?
What is Earth’s rotation on its axis?
What type of eclipse happens when the Moon passes directly between Earth and the Sun?
What is a solar eclipse?
How does the Sun affect Earth’s tides?
The Sun’s gravity works with or against the Moon’s gravity, making tides higher or lower depending on their alignment.
What type of energy is stored in the bonds of atoms and molecules?
What is chemical energy?
When it’s winter in the Northern Hemisphere, what season is it in the Southern Hemisphere, and why?
What is summer, because the Southern Hemisphere is tilted toward the Sun while the Northern Hemisphere is tilted away?
The Sun appears to rise in the east and set in the west each day. What causes this apparent motion?
What is Earth’s rotation from west to east?
Why do we always see the same side of the Moon from Earth?
Because the Moon’s rotation and revolution take the same amount of time, causing one side to always face Earth — a condition called synchronous rotation.
When do spring tides occur, and why are they higher than normal tides?
When the Sun, Moon, and Earth are in a straight line (during new and full moons), their combined gravity causes higher high tides and lower low tides.
What gas do plants take in during photosynthesis and release during respiration?
What is carbon dioxide (CO₂)?
Why do the equator’s temperatures stay relatively consistent all year, even though Earth is tilted?
Because the equator always receives direct sunlight year-round, regardless of the tilt.
How does Earth’s revolution around the Sun combine with its tilted axis to create seasonal changes?
As Earth revolves around the Sun, the tilt causes different hemispheres to receive varying amounts of sunlight, producing the seasons.
How many Moon Phases are there and list all of them in order?
There are 8: New Moon, Waxing Crescent, 1st Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, 3rd Quarter, and Waning Crescent
Why are neap tides weaker than normal tides?
Because during the first and third quarter moons, the Sun’s and Moon’s gravitational pulls are at right angles, partially canceling each other out and creating smaller tidal differences.
What layer of Earth is liquid, creates Earth’s magnetic field, and lies beneath the mantle?
What is the outer core?