# Blog

## Growing big – a quick quiz

By

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This quiz is all about growth! Can you grow your knowledge and get the high score?

### #1. In which season is the Eiffel Tower in France the tallest?

The Eiffel Tower is made of steel and steel expands when it’s hot. As a result, it can be about 15 centimetres taller in summer than winter.

### #2. How much does a baby blue whale grow each day?

For the first 6 to 8 months of its life a baby blue whale will feed on its mother’s fatty milk, averaging a gain of about 90 kilograms per day.

### #3. What event created the mountain Parícutin in the years 1943–52?

In 1943, a Mexican farmer noticed a smoking hole in his field. Over the next 9 years, Parícutin erupted again and again, growing to 424 metres high!

### #4. The bacteria Vibrio natriegens is famous for growing fast. How long does it take to double in population?

Vibrio natriegens can double in population in only 10 minutes, which is why many scientists are using it for their experiments.

### #5. True or false? The Sun is slowly growing larger but it’s losing mass.

True. While the Sun is losing almost 6 million tons of material every second, its radius is slowly getting bigger.

## Results

Congratulations! You are a real science whiz!

Oh dear! Better brush up before the next quiz!

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## 2 responses

1. Richard

Hi, Could you solve a puzzle for me? If the speed of light is 299,792.488km per second. Why is that when I look through a telescope and I can see another galaxies within a very short time as it is 25,000 light years away.

1. David

Hi Richard,
If you’re looking at something 25,000 light years ago, the light that’s hitting your telescope must be 25,000 years old. As long as the stars were shining back then, you should be able to see them.

Some astronomers think that the ‘Pillars of Creation’ gas cloud was destroyed 6000 years by a nearby exploding star. But since the Pillars are 7000 light years away, we can still see them!
https://en.wikipedia.org/wiki/Pillars_of_Creation#Theorized_destruction

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