Earth's Tilt and Seasons
What causes the seasons on Earth?
The tilt of Earth’s axis and its orbit around the Sun.
What shape is Earth's orbit?
An ellipse.
What does Newton’s 1st Law state about motion?
An object will remain at rest or in motion unless acted on by an outside force.
What is the formula for Newton’s 2nd Law?
F = m x a (Force = mass × acceleration).
What does Newton’s 3rd Law state?
For every action, there is an equal and opposite reaction
Which season begins on December 21st in the Northern Hemisphere?
Winter
How long does it take for Earth to orbit the Sun?
One year (365 days).
What is inertia?
The tendency of an object to resist changes in its motion.
What does the second law state about force and acceleration?
Force is equal to mass times acceleration.
What is an example of action and reaction in everyday life?
Answers may vary
How does Earth’s tilt affect the length of daylight in the summer?
The days are longer, and the Sun’s rays hit the Earth more directly.
What happens to an object in motion if no outside force acts on it?
It will continue moving at the same speed and in the same direction.
How can you increase the acceleration of an object?
By increasing the force applied to the object.
When you jump off a boat, what happens to the boat?
The boat moves backward as you move forward.
What happens during the spring equinox?
The length of day and night is nearly equal, and the Sun shines directly on the equator.
If a ball is rolling on a flat surface, what will happen if no friction is present?
It will keep rolling indefinitely.
What happens to the acceleration if you increase the mass of an object, keeping force constant?
The acceleration decreases.
If you push against a wall, what happens to the wall?
The wall pushes back with an equal force.
When is the autumnal equinox?
Around September 22nd or 23rd.
Give an example of inertia in everyday life.
ANSWER MAY VARY.
If you apply the same force to two objects with different masses, what happens to their acceleration?
The object with the smaller mass will have a greater acceleration.
How is a rocket launch an example of Newton’s 3rd Law?
The rocket’s engines push downward (action), and the rocket moves upward (reaction).