Lesson 3

• Nask
• Middelbare school
• havo, vwo
• Leerjaar 1

Astronomy

3.2 Day and night

+

3.3 The seasons

This lesson

• The night sky
  

• Discussing the Astronomy poster assignment

• Day and night and the seasons

Goals

• To discuss the homework exercises
  
• To make a start on paragraph 2.2 and 2.3
  

The night sky

Exercise

a) Make a list of objects mentioned in 3.1 that astronomers have found in the universe.

b) Explain what the words orbit, natural satellite, artificial satellite, meteors, meteorite and comet mean.

c) Give an example of a natural satellite.

d) Give an example of an artificial satellite.

Link

The night sky

• Stars
  
• Planets
  
• Dwarf planets
  
• Exo planets
  
• Moons
  
• Comets
  
• Meteors
  
• Comets
  

Astronomy poster

Astronomy poster

Use an empty page of your notebook for this assignment.

Make a poster that explains what the following terms mean:

Planet, moon, solar system, star, galaxy, orbit.

• Write down what each term means.
• Order these objects from smallest to largest.
  
• Explain through text and drawings how these terms go together.
  

Exercise

Open up the page on which you made your poster.

Compare your poster to your neighbour's and answer the following questions:

•  What are the similarities between your two posters?
• What are the difference between your two posters?

Orbit	An object in space rotating around another object in space.
Moon	A natural object rotating around a planet.
Planet	A large natural object rotating around a star
Star	A massive, luminous body of gas in the center of a solar system
Solar system	A system of planets and other objects orbiting a star held together by gravity.
Galaxy	A massive collection of solar systems held together by gravity orbiting a black hole.

Planets

Suns

Galaxy

Solar system

Moons

Planets

Suns

Galaxy

Solar system

Moons

Clusters

Super clusters

Filaments

1) How long does it take Earth to spin once around it's axis?

2) How long does it take Earth to make one rotation around the sun?

3) When it's night, that area of the earth is faced towards / away from the sun

4) When it's day, that area of the earth is faced towards / away from the sun

5) How many degrees is the tilt of the Earth's axis?

6) What is the northern hemisphere of the earth? What is the southern hemisphere of the earth?

7) The seasons in the Northern and southern hemisphere's are reversed. True or false?

Homework

Read paragraph 3.2 and 3.3

Do the ybellowblock exercises of paragraph 3.2 and 3.3