Suppose an extra-solar planet is discovered orbiting a nearby star. The planet is spherical, composed primarily of carbon dioxide (a gas), 10 times larger than Earth, and orbits its star at a distance comparable to 5 AU. What type of planet has been discovered?
Suppose an extra-solar planet is discovered orbiting a nearby star. The planet is spherical, composed primarily of ice, the size of our moon, and orbits its star at a distance comparable to 20 AU. What type of planet has been discovered?
Which answer best describes the conditions on Earth when it first formed?
|A)||solid, no oceans|
|B)||molten, no oceans|
How does excess heat from the Earth's early formation reach the surface?
|C)||both a and b|
|D)||neither a nor b|
What would happen to July temperatures in Australia if Earth's rotation axis increased to 25 degrees?
|A)||Average temperatures would decrease|
|B)||Average temperature would increase|
|C)||Average temperature would stay the same|
The moon has what type of obit?
Which of the following are pulsating stars used to determine the dimensions of the Universe?
What is the "Doppler effect?"
|A)||A change in the speed of light as the source moves relative to the observer|
|B)||A change in the luminosity of light as the source moves relative to the observer|
|C)||A change in the frequency of light as the source moves relative to the observer|
What causes the Sun's heat?
|A)||Energy release from nuclear fusion|
|B)||Energy release from nuclear fission|
|C)||Energy release from nuclear decay|
Which planets are likely to have the strongest gravitational fields?
|A)||Terrestrial or rocky|
|B)||Jovian or gaseous|
Which planets have more moons?
Which is the correct order for the first six planets in our solar system starting from the Sun?
|A)||Mercury, Mars, Earth, Venus, Saturn, Jupiter|
|B)||Mercury, Venus, Mars, Earth, Jupiter, Saturn|
|C)||Mercury, Venus, Earth, Mars, Jupiter, Saturn|
Why do we observe the Sun rising in the East and setting in the West?
|A)||Earth rotates on its axis|
|B)||The Sun revolves around the Earth|
|C)||Earth revolves around the Sun|
|D)||The Sun rotates on its axis|
How do we define the length of a year on Earth?
|A)||A year is related to the revolution of the Sun around Earth|
|B)||A year is related to the rotation of Earth on its axis|
|C)||A year is related to the revolution of Earth around the Sun|
|D)||A year is related to the rotation of the Sun on its axis|
Which of the following features is unique about Earth?
|A)||Earth is composed primarily of rocky material|
|B)||Earth is in orbit around a star|
|C)||Earth has an atmosphere|
|D)||Earth has liquid water on its surface|
|E)||Earth has a moon|
Why do the planets orbit the sun and not the Earth?
|A)||Earth is not close enough to the center to control the orbits of other planets|
|B)||Earth is not small enough to produce the kind of energy needed to control the other planets|
|C)||Earth is not massive enough to have the kind of gravitational force needed to keep planets in orbit around it|
|D)||All of the above explain why the planets orbit the sun|
|E)||None of the above explain why the planets orbit the sun|
__________ would have the largest number of days in its year because ______?
|A)||The Earth; it has water on it which slows it down.|
|B)||Mercury; it moves very slowly because it so hot.|
|C)||Neptune; it is farthest away from the sun, and therefore has farther to travel.|
|D)||Jupiter; it is the largest planet which makes it move faster around the sun.|
|E)||Venus; it has an atmosphere that is so thick it can hardly move through space.|