Answer to Previous Question:Heavier would mean more gravity (assuming similar radius). Less tilt means warmer winters and cooler summers. Faster rotation would means 6 hours of daylight and 6 hours of night.

Unit 1 Review:In 1977, NASA launched a probe called the Voyager 1. (A space probe is a small robot, sent into outer space, where it can take pictures, collect samples, take temperature readings, etc.) To this day, it is the fastest spaceship ever built.

1. The probe was originally launched toward Jupiter (365,000,000 miles away). It did not arrive until March of 1979 (14,038 hours later). How fast was it traveling?

2. At that rate, how long would it take the probeto reach Neptune (2,700,000,000 miles)?

Vocabulary:Below are the definitions of four different vocabulary words related to Unit 5. For each one, list the word that is being defined.

1. _________________ - a natural phenomenon by which physical bodies attract with a force proportional to their mass

2. _________________ - the periods of the year characterized by particular conditions of weather, temperature, etc.

3. _________________ - the alternate rising and falling of the sea, usually twice in each day at a particular place

4. _________________ - a measurement of how quickly your speed is changing

Calculating Gravity:

Answer to Previous Question:

1. About 26,00 mph.

2. About 103,846 hours (roughly 12 years).

*Voyager did finally reach Neptune… in 1989!

For each of the planets below, calculate their gravity. Use units of m/s per second.

Answer to Previous Question:1. Gravity 3. Tides2. Seasons 4. Acceleration

Sun, Earth, Moon:

Draw a diagram of the Sun-Earth-Moon system. Include correct sizes, distances, and motion. Make your diagram as realistic as possible.

Answer to Previous Question:Mista = 8.1 m/s per secondKadi = 47.2 m/s per second

Seasons:

Looks closely at the diagram below, then answers the questions.

1. In the diagram, what season is it in the Northern Hemisphere?

2. In the diagram, what season is it in the Southern Hemisphere?

3. What season will it be, in Marshfield, three months later?

4. What season will it be, in Australia, three months later?

Tides:

Answer to Previous Question:

1. Draw a diagram on your paper that includes the Earth and the moon and labels all four tides.

2. What would happen to tides, on Earth, if the moon disappeared?

Answer to Previous Question:1. Summer 3. Fall2. Winter 4. Spring

A Mystery Planet:

Imagine you wake up on a brand new planet. It is just like Earth except for the fact that it is slightly heavier, it has an axis tilt of only 15°, and it spins twice as fast. How would life on this planet be different?

Answer to Previous Question:1. 2. The moon causes 68% of tides on Earth. If it disappeared, most of the tides would be gone. But there would still be a slight high tide from the sun. Every day at noon, the sun would cause a 2-3 foot high tide. And every night at midnight, there would be a 1-2 foot high tide. Every day, at sunrise and sunset, there would be a slight low tide.