Earth's Tilt
What is Earth’s axis?
An imaginary line Earth rotates on.
How long does it take Earth to revolve around the Sun?
365 days and 1/4
Do neap tides have a large or small tidal range?
Small tidal range meaning small tides
Do spring tides have the highest or lowest tidal range?
Highest tidal range
What force causes ocean tides?
Gravity
What is the angle of Earth’s axial tilt?
23.5°
Which TWO factors cause seasons on Earth?
Earth's Tilt and Revolution
During which moon phases do neap tides occur?
First quarter and third quarter
Which moon phases cause spring tides?
New moon and full moon
What motion of Earth causes day and night?
Rotation
How does Earth’s tilt affect sunlight on Earth?
It changes how direct the sunlight is.
True or False: Earth is closer to the Sun during summer.
False (Remember this is a MISCONCEPTION)
When do neap tides occur: when the Sun and Moon line up or form right angles?
When they form right angles
When do spring tides occur: when the Sun, Earth, and Moon line up or form right angles?
When they line up in a straight line
True or False: Earth’s rotation causes seasons.
False
When the Northern Hemisphere is tilted toward the Sun, what season does it experience?
Summer
Why does the same location on Earth experience the same seasons each year?
Because Earth revolves around the Sun with a tilted axis.
Why are tides weaker during neap tides?
The Sun’s and Moon’s gravitational pulls partially cancel.
Why does the Moon affect tides more than the Sun?
Because the Moon is closer to Earth.
Which object has the greatest effect on Earth’s tides?
Earth's Moon
Explain how Earth’s tilt causes seasons.
Earth’s tilt changes the angle of sunlight as Earth revolves, causing seasons.
Why does Dallas, Texas have more daylight hours in July than in January?
Because the Northern Hemisphere is tilted toward the Sun in July.
Explain why high tides are lower during neap tides.
Because the gravitational forces are weaker when the Sun and Moon pull at right angles.
Why were tides stronger billions of years ago?
Because the Moon was closer to Earth, creating stronger gravity.
Explain how gravity causes both spring tides and neap tides.
Gravity from the Sun and Moon pulls on Earth’s oceans. When they line up, spring tides occur; when they pull at right angles, neap tides occur.