Social Studies Unit 6 Lesson 5: Understanding the Universe Solved Exercise Page 98, 99 and 100

Social Studies Unit 6 

Lesson 5: Understanding the Universe

Exercise 1: What is a light year?

A light year is a unit of measurement used to measure the distance that light takes to travel in one year from one star to the other.

Exercise 3: What is a star? Name an important one. What makes it important?

A star is a self-luminous body in space / Polaris or North Star, and it is important for navigation.

Exercise I: Use the words in the box to fill in the blanks.

1. The gaseous mixture that covers Earth’s surface is called atmosphere.

2. When the atmosphere changes within 24 hours or less, this means that the weather is changing.

3. A climate characterizes the general atmosphere of a place or season over a long period of time.

4. The plants that are found in a specific place are called vegetation.

5. A group of stars with a known pattern is called constellation.

6. An instrument that is used to make distant objects appear nearer is called a telescope.

7. The period of time which Earth takes to complete a full round aroud the sun is called a solar year.

8. The lunar year is based on the moon’s cycles and phases.

Exercise II: Circle the best choice.

1. Temperature is usually measured by the _____________________.

a. atmospheric pressure

b. thermometer

c. anemometer

2. The climate that is generally characterized by its year-round warm temperature, humidity, and abundant rainfall is the _____________________.

a. wet- dry tropical climate

b. Mediterranean climate

c. tropical moist climate

3. The first scientist to invent and assemble the first telescope is_____________________.

a. Hans Lippershey of Holland

b. Galileo Galilee

c. Sir Isaac Newton

4. Where do starts revolve?

a. around the moon

b. around themselves

c. around Earth