Movement of Solar System Part 1

The gravitational force is the greatest when the distance between 2 objects is. . .

• closer

• farther apart

An object with ____________ mass has a greater gravitational attraction to Earth.

• More

• Less

What 2 things determine gravitational force?

• Less Mass & Closer Distance

• More Mass & Closer Distance

• More Mass & Farther Distance

• Less Mass & Farther Distance

Kepler's 1st Law

• Gravitational force increases as the mass of an object increases or as the distance between two objects decreases

• The square of a planet's orbital period is proportional to the cube of the planet's mean distance from the sun

• The orbit of a planet or other body around the sun is an ellipse, and the sun is one focus of the ellipse

• As a planet moves around its orbit, the planet sweeps out equal areas in equal amounts of time

Newton's law of universal gravitation

• Gravitational force increases as the mass of an object increases or as the distance between 2 objects decreases

• The square of a planet's orbital period is proportional to the cube of the planet's mean distance from the sun

• The orbit of a planet, or other body, around the sun is an ellipse, with the sun at one focus of the ellipse

• As a planet move around its orbit, the planet sweeps out equal areas in equal amounts of time

Gravity is. . .

• a force that causes wieght

• a force

• a force the pulls down on Earth

• the force that objects exert on each other because of their masses

Spring tides occur once a month

• True

• False

Spring tides occur twice a month

• True

• False

Spring tides occur during

• full moon, new moon

• full moon, first quarter moon

• first quarter moon, new moon

• first quarter, third quarter

Why do we have moon phases?

• The Moon rotates about its axis

• The Moon exerts a tide producing force on Earth

• The Moon's orbit is more elliptical than Earth's

• The Moon's position changes with respect to Earth and the Sun