Chapter 12 Q/A Flashcards
If you were given a light source, a tennis ball and a football, how would you use them to represent the Sun, Earth, and the Moon? Is the representation accurate?
Page 258
Think About It Page 258
What shape is the Earth, Sun, and Moon? How do we know that the Earth is a “ and not flat?
Page 258
Explain whether different celestial bodies are light sources.
Page 259-260
When did we first land on the Moon? Who first set foot on the Moon?
Page 260
What is the cause of a year?
Page 260
Explain different kinds of calendars.
Page 261
What is the cause of a day? Explain this cycle using an example.
Page 261-262
What would happen if the Earth did not rotate?
Page 262
What is the cause of a month?
Page 263-264
Explain solar eclipses. Draw the diagram.
Page 265
Think About It Page 265
Why do solar eclipses not occur every month whenever there is a new moon?
Page 267
Explain lunar eclipses. Draw the diagram.
Page 266
What are some myths and legends about eclipses?
Page 267
How are seasons different in different places on the Earth?
Page 268
What causes the seasons on Earth? What are the steps to finding this out?
Page 269-270
What are stars and planets? Describe the solar system.
Page 271-273
Answer the following questions:
a. Write down the names of the planets, from:
i. the heaviest to the lightest;
ii. the largest to the smallest;
iii. the one with the most number of moons to the one with the least.
b. Which planet has the longest year? Why?
c. Which planet has the shortest day? How long does it take to make one rotation?
d. Relate the average temperature of each planet to its distance from the Sun. Are there any exceptions? If so, suggest a reason for the exception.
e. Compare the time taken for Venus to make one rotation and one revolution. In what way is it different from the other planets?
Page 273
Try it Out Page 273
Classify the objects that make up the solar system into those which are luminous and those which are non-luminous.
Page 273
Why is the Earth able to sustain life?
Page 275-276
Think About It Page 276
Name the similarities between Venus and Earth. Why is Venus unable to support any life forms?
Page 276
Explain stars. What is the next nearest star to the Earth after the Sun? How do stars congregate?
Page 278-279
What makes it difficult to observe the night sky?
Page 279
Why do stars appear to move?
Page 279-280
How can and how have we found out more about stars and the solar system?
Page 280-283
