# How long would it take for an aeroplane to fly all around the world? Try our kidsâ€™ quiz

1. Millie, 5, asks: how long would it take for an aeroplane to fly all around the world?

1. Around 45 hours

2. Around 365 hours

3. Around 80 days

4. Around 108 days

2. Ellie, 5, asks: why is blood red?

1. Blood is red if you eat a lot of tomatoes, cherries or strawberries

2. Red is often a scary colour in nature to give you a warning

3. So that if you bleed you can see it really easily and stop the blood

4. Because it contains haemoglobin

3. Oisin, 10, asks: who was the first modern Olympic Games medallist?

1. A swimmer who won freestyle

2. A triple jump athlete

3. A high jumper

4. A 100 metre runner

4. Harvey, 6, asks: how is cardboard made?

1. Wood chips are broken down to make paper, which is then combined to make cardboard

2. Cardboard is made out of Christmas cards and chopping boards that are broken down and mixed together

3. Cardboard is made out of old floorboards that arenâ€™t used any longer

4. Cardboard is made of seaweed

5. Lucia, 7 Â˝, asks: which animals are most closely related to sloths?

1. Hippos

2. Walruses

3. Koalas

4. Anteaters and armadillos

## Solutions

1:A - If a Boeing 747-8 could fly around the Earth nonstop, it would take around 45 hours. However, the plane would need to stop for fuel top-ups, so it could take up to 60 hours. The journey would also be affected by the plane type and speed, and the weather., 2:D - Red blood cells contain an iron-rich protein called haemoglobin which helps to transport blood around the body. Haemoglobin contains sub-units called hemes, which interact with oxygen in your lungs and make blood appear red., 3:B - In 1896, the modern Olympic Games were held in Athens, marking the first Olympics for more than 1,500 years. The first modern champion was the American James Connolly, who won the triple jump., 4:A - Cardboard is made from different types of paper joined together. The paper is made from wood chips of trees that are pulped to break them down into fibres., 5:D - Along with anteaters and armadillos, sloths are part of an ancient group of mammals called xenarthrans. Large, curved claws and strong limbs for digging are some of these animalsâ€™ distinctive features.

### Scores

1. 5 and above.

2. 4 and above.

3. 3 and above.

4. 2 and above.

5. 0 and above.

6. 1 and above.

Molly Oldfield hosts Everything Under the Sun, a weekly podcast answering childrenâ€™s questions, out now as a book.

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