IGCSE Space Physics

Which of the following is true of the Sun?

• The Sun is the closest star to Earth.

• The Sun is the smallest star in the Milky Way

• The Sun is the largest planet in our Solar System.

• The Sun is an example of a galaxy that gives off light energy.

What causes the day/night cycle?

• Earth turning on its axis.

• Earth revolving around the Sun.

• The Sun revolving around the Earth.

• The Moon revolving around the Earth.

When the Moon is directly between the Sun and the Earth, what phase would the Moon be in?

• Full Moon

• New Moon

• Half Moon

• Waxing Crescent

What evidence from the text supports why the Moon seems to change shape from night to night?

• The Moon shines on Earth differently depending on the weather.

• As the Moon travels around Earth, its distance from Earth changes.

• The moonlight hits Earth at different places depending on the time of day.

• As the Moon travels around Earth, sunlight hits it from different directions.

Which of the following stars has the highest surface temperature?

• White

• Yellow

• Red

• Bluish-white

Which of the following forms a star?

• Nebulae

• Supernova

• White dwarf

• Black hole

Which of the following characteristics can be used to classify stars?

I Age

II Shape

III Brightness

IV Colour

• I and II

• III and IV

• II and III

• I and IV

The following information shows the formation of a star.

P- The gas ball starts to shine and a new star is born.

Q- A lot of heat energy and light energy are released from the core.

R- The gases and dust particles in nebulae are pulled by a strong gravitational force until it becomes compact core.

S- The core becomes hotter causing a nuclear reaction to occur when the temperature and pressure are too high.

• P,Q,R,S

• P,Q,S,R

• R,Q,S,P

• R,S,Q,P

Diagram shows a galaxy. What is the type of this galaxy?

• Elliptical

• Spiral

• Milky Way

• Irregular

Why is the temperature of Venus higher than Mercury?

• The density of Venus is higher

• The gravitational force on Venus is higher

• Venus does not have clouds to absorb and reflect heat

• The atmospheric layer of Venus contains 96% of carbon dioxide gas that causes greenhouse effect