Earths Movement
What causes Earth to have 24-hour days?
Earth rotates once on its axis every 24 hours.
What is the main reason Earth has different seasons?
Earth's Axis is tilted
What event happens when the Moon blocks sunlight and casts a shadow on Earth?
Solar eclipse
Why do liquids take the shape of their container?
their particles can move and slide past each other
Why does ice melt into water when heated?
the particles gain energy, move faster, and break apart from their fixed positions
Why do we experience day and night on Earth?
Because Earth rotates, making different parts face toward or away from the Sun.
When the Southern Hemisphere is tilted toward the Sun, which season is it experiencing?
Summer
During a solar eclipse, which object must be between the Earth and the Sun?
The Moon
Why do solids keep their shape?
their particles vibrate in fixed positions
What happens to particle speed when heat is added?
it increases
How long does one full rotation of Earth take?
24 hours.
What type of tide occurs when the Sun, Moon, and Earth line up in a straight line?
a Spring tide
If you are standing in the darkest part of the Moon’s shadow, what do you see?
a total solar eclipse
How are gas particles spaced?
they are far apart
What happens to the air in a balloon if it is heated after being frozen?
the air expands and the balloon gets bigger again
What happens when the part of Earth you’re on faces away from the Sun?
It becomes night
What type of tide occurs when the Sun and Moon pull at right angles to each other?
Neap tide
How are the Earth, Moon, and Sun positioned during a spring tide?
in a straight line
What happens to particle movement when temperature decreases?
particles slow down
Why do particles take up less space when cooled?
they lose energy and move more slowly
What imaginary line does Earth spin on?
Earth's Axis
Why does the Southern Hemisphere have longer daylight hours in summer?
Because it is tilted toward the Sun, receiving more direct sunlight.
What angle do the Earth, Moon, and Sun form during a neap tide?
a 90 degree angle (right angle)
Why does a balloon shrink in the freezer?
cold air particles move slower, taking up less space, and become closer together
What scientific model explains how particles behave in solids, liquids, and gases?
the particle model (particle theory)