The document discusses different types of stars categorized by their color, from coolest red stars like Betelguese and Antares at around 3000 degrees Celsius, to hotter orange, yellow like our sun, and white stars like Sirius and Vega around 11,000 degrees Celsius, with the hottest being bluish-white stars like Rigel at 20,000 degrees Celsius. Examples are provided for each color category along with their surface temperatures. The document also covers star magnitudes, twinkling, measuring distance in light years, and identifying star types based on descriptions of their size.

1. telescope Earth

2. stars

3. What is our topic for
today?
Identify the kind of
stars according to
their color

4. What are the
kind of stars
according to their
color?

5. What are the
standards in group
work activity?

6. Open your textbook “ Science and
Health: Into The Future ”. Open your
book to pp. 251-253.
What are the
colors of stars.
Give examples.

7. Pupils to work in
pairs. One will ask
questions about our
topic and the other
one will answer .

8. Group of Stars According to Color
Stars are made of very hot gases, mostly hydrogen and
helium provides fuel that produces the light energy of the
star.
1. Red stars- are the coolest star
Ex. Betelguese and Antares (3000) degrees Celsius
2. Orange stars- are stars cooler than red stars
Ex. Arcturus ( 4,200 degrees Celsius)
3. Yellow stars- are hot stars
Ex. Sun ( 6,000 degrees Celsius) and Procyon
4. White stars- are hotter stars compared to yellow star.
Ex. Sirius and Vega (11,000 degrees Celsius)
5. Bluish- white stars- are the hottest stars.
Ex. Rigel (20,000 degrees Celsius)

9. 1.Magnitude- is the degree of
brightness of a star.
2. Stars seem to twinkle because
their light passes through different
layers of air surrounding the Earth.
3. The distance of stars from the
Earth are measured in light years.

10. 1. Apparent Magnitude- the
apparent brightness of stars
due to their size and distance
from the Earth.
2. Light Years- refers to the
distance of the stars from
the Earth.

11. supergiant star giant star dwarf star
Identify the kind of star being described
1. Larger than the sun.
2. Smaller than the sun.
3. Smaller than supergiants but
bigger than the Sun.
4. NGC 2440 is the example.
5. Antares is _______

12. Research on the picture
or images of the colors
of star.
Label them properly.