What are the four Galilean moons of Jupiter?

Graph the function

$$f$$

. Then use the graph to determine whether the inverse of

$$f$$

is a function.

$$f(x) = 0.25x^2$$

When the size of the lighted part of the moon's near side is decreasing, the moon is

a. full.

b. waxing.

c. annular.

d. waning.

During each orbit around Earth, the moon spins on its axis

a. 1 time.

b. about 29 times.

c. about 27 times.

d. 365 times.

What can be learned about a star (or other celestial objects) from a dark-line (absorption) spectrum ?

Which of the choices is not true of comets?

(a) They are composed of dust and ice.

(b) They revolve around the Sun in highly elliptical orbits.

(c) They can be observed on entering the solar system.

(d) They usually have a long tail when they are close to the Sun.

Why is life unlikely to exist on Venus?

a. List the four inner planets in order of size, from smallest to largest. b. How are the four inner planets similar to one another?

What evidence supports the theory that liquid water may have existed on Mars? What evidence refutes the possibility of a wet Martian climate?

Describe two pieces of evidence that support the big bang theory.

When Earth's shadow falls on the moon, the shadow causes a a. new moon. b. solar eclipse. c. full moon. d. lunar eclipse.

In a lunar eclipse, does the Moon enter the shadow of Earth from the east or west side? Explain.

What is the age of our solar system?

Factor each numerator. Then remove the factor common to the numerator and denominator. Write the result in the form a + bi. a.

$$\frac { 3 + 6 i } { 3 }$$

b.

$$\frac { 15 + 25 i } { 10 }$$