Chapter 7&8 Vocabulary

Question 1

The idea that all the matter in the universe May contract and form a single ball of matter.

Answer 1

Big Crunch

Question 2

Matter that can’t be seen but exerts a gravitational pull on stars and galaxies.

Answer 2

Dark matter

Question 3

Velocity parallel to the earth’s surface

Answer 3

Transgental velocity

Question 4

There is gravitational attraction between only two masses in the universe. The strength of the force is inversely proportional to the distance squared.

Answer 4

Newton’s Law of Universal Gravitation

Question 5

The intensity of an effect to the inverse square of the distance from the cause.

Answer 5

Inverse Square Law

Question 6

Higher than average high tides, lower than average low tides. Occurs when the sun, moon, and earth are in line. (Strongest during new and fool moon)

Answer 6

Spring tides

Question 7

Lower than average high tides and higher than average low tides. (First and third quarter)

Answer 7

Neap Tides

Question 8

Any object that moves through the air or space under the influence of gravity.

Answer 8

Projectile

Question 9

An object in orbit around a body with a larger mass.

Answer 9

Satellite

Question 10

The earth drops a vertical distance of 5m for every 8000m tangent to its surface.

Answer 10

Curvature of the Earth

Question 11

An oval path based on two fixed points called foci.

Answer 11

Ellipse

Question 12

Both foci are at the same point. A special kind of ellipse.

Answer 12

Circle

Question 13

The speed that a projectile must reach in order to escape the gravitational attraction of the Earth.

Answer 13

Escape speed

Question 14

What is all the matter in the universe compressed into a small ball that exploded. This expanding material gave rise to the current stars and galaxies?

Answer 14

Big Bang Theory

Question 15

The curved path of a projectile caused by both horizontal and vertical motion.

Answer 15

Parabola