Grade 11 Physical Science

Which of the following ancient Greek philosophers computed for the circumference of the Earth?

• Pythagoras

• Anaxagoras

• Eratosthenes

• Aristotle

If the Earth is a flat disc, which of the following can be observed of a cruising ship?

• It will become smaller and smaller until it disappears.

• It will not change its size.

• t will shrink then only the sail will be visible until it completely disappears.

• It will become bigger and bigger.

Which of the following describes the position of the North Star as you go nearer the equator?

• It disappears completely.

• Farther away from the horizon.

• The North Star is fixed wherever you are on the Earth.

• Closer to the horizon.

How did the Greeks especially Aristotle use the lunar eclipse phenomenon to explain that the Earth is not flat?

• He argued that a lunar eclipse only happens when a round opaque object blocks the passage of sunlight.

• He argued that since the shape of the moon appears to be round then the Earth must also be round.

• .   He noticed that all things seemed to be moving around the Earth except for Earth itself.

• He noticed that the shadow cast by Earth on the moon was round.

He was able to explain what causes the phases of the moon. According to him, the moon  shone only by reflected sunlight.

• Eudoxus   

• Aristarchus

• Anaxagoras    

• Hipparchus        

According to Eratosthenes, which of the following explains why a vertical stick cast  shadow in Alexandria but not in Syene?

I. The Sun is directly overhead in Syene while Alexandria, it is only almost directly overhead.

II. The light rays coming from the sun are parallel, and the Earth is curved.

III. The light rays coming from the sun are curved, and the Earth is flat.

                      IV.    The sun is directly overhead in Alexandria while in Syene, it is only almost directly overhead.

 

• I only      

• I and II

• III and IV

• II and IV

What role does the Earth's spherical shape play in understanding climate and weather patterns?

• It determines the length of day and night

• It causes earthquakes and volcanic eruptions.

• It creates the ozone layer

• It affects atmospheric circulation and ocean currents.

What moon phase would be seen from Earth when the moon is at position 5?

• first quarter  

• full moon 

• new moon     

• third quarter

Which of the following is the correct phases of the Moon from position 6 through 8?

• Waxing Gibbous, Third Quarter, Waxing Crescent

• Waxing Crescent, First Quarter, Waxing Gibbous

• Waning Crescent, First Quarter, Waning Gibbous

• Waning Gibbous, Third Quarter, Waning Crescent

The different phases of the Moon are caused by ________________.

• The tides of the ocean.

• The days of the months.

• The position of the Earth in its orbit around the Sun.

• The angle at which we see the lit Moon as it revolves around the Earth.