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INSTRUCTIONS

1.- Study the examples: analyse the differences and decide why they are different.
2.- Reply to the prompts as in the examples.
3.- Check your answer dragging the mouse over the { hidden answer } after each prompt.

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EXAMPLES:
a)	PROMPT:	Jupiter / planet / big / Saturn / in the Solar System
	ANSWER:	Is Jupiter a bigger planet than Saturn?
		Yes, it is the biggest planet in the Solar System.
b)	PROMPT:	Diamonds / mineral / hard / quartz / on Earth
	ANSWER:	Are diamonds a harder mineral than quartz?
		Yes, diamonds are the hardest mineral on Earth.

PROMPTS:

1.- Blue whales / animals / big / sperm whales / on Earth
{ Are blue whales bigger animals than sperm whales? Yes, blue whales are the biggest animals in the world.}
2.- Anacondas / snakes / long / cobras / in the world
{ Are anacondas longer snakes than cobras? Yes, anacondas are the longest snakes in the world. }
3.- February / month / short / April / in the calendar
{ Is February a shorter month than April? Yes, February's the shortest month in the calendar.}
4.- Humming birds / birds / small / canaries / in the world
{ Are humming birds smaller birds than canaries? Yes, humming birds are the smallest birds in the world.}
5.- The Nile / river / long / the Amazon / in the world
{ Is the Nile a longer river than the Amazon? Yes, the Nile's the longest river in the world.}
6.- Elephants / animals / heavy / hippopotamuses / in Africa
{ Are elephants heavier animals than hippopotamuses? Yes, elephants are the heaviest animals in Africa.}
7.- Antarctica / place / cold / the North Pole / on Earth
{ Is Antarctica a colder place than the North Pole? Yes, Antarctica's the coldest place on Earth.}
8.- Mercury / planet / hot / Venus / in the Solar System
{ Is Mercury a hotter planet than Venus? Yes, Mercury's the hottest planet in the Solar System.}
9.- New York / city / large / Los Angeles / in the USA
{ Is New York a larger city than Los Angeles? Yes, New York's the largest city in the USA.}
10.- The Pacific / ocean / deep / the Atlantic / in the world
{ Is the Pacific a deeper Ocean than the Atlantic? Yes, the Pacific's the deepest ocean in the world.}
11.- Australia / island / large / Greenland / in the world
{ Is Australia a larger island than Greenland? Yes, Australia's the largest island in the world.}
12.- A cheetah / runner / fast / a leopard / in the world
{ Is a cheetah a faster runner than a leopard? Yes, a cheetah's the fastest runner in the world.}
13.- Ostriches / birds / big / penguins / in the world
{ Are ostriches bigger birds than penguins? Yes, ostriches are the biggest birds in the world.}
14.- Nitrogen / element / abundant / oxygen / in the atmosphere
{ Is nitrogen a more abundant element than oxygen? Yes, nitrogen's the most abundant element in the atmosphere.}
15.- This / exercise / difficult / the previous one / unit 1
{ Is this a more difficult exercise than the previous one? Yes, this is the most difficult exercise in unit 1. }