1. Bethan, 6, asks: why do lightbulbs get hot when you turn them on?

   1. The glass of the bulb magnifies sunlight and makes itself hot

   2. Lightbulbs are also meant to keep people warm

   3. The bulb usually contains a thin wire that can’t produce light without producing heat

   4. A lightbulb uses a small piece of the sun to produce light and heat

2. Muna, 13, asks: how many animal species are extinct?

   1. More than 50,000

   2. More than 500,000

   3. More than 5 million

   4. More than 5 billion

3. Maddie, 9, asks: why can’t you taste food when you hold your nose?

   1. You can – concentrate hard and you will taste it!

   2. The mouth can only taste basic flavours – the nose helps us taste the rest

   3. There is a second tongue in your nose

   4. Food doesn’t really have a taste, but smells strong

4. Felix, 6, asks: how many pandas are there still in the world?

   1. None – pandas are extinct

   2. About 1,450

   3. About 2,450

   4. About 6,450 – smaller than the number of animals in London zoo

5. Kristoff, 10, asks: what’s the difference between Catholics and Christians?

   1. Catholics prefer ketchup; Christians like mayonnaise

   2. Catholicism is a part of Christianity

   3. Christianity is a part of Catholicism

   4. Nobody knows

Solutions

1:C - Inside traditional lightbulbs is a thin wire filament, usually made of tungsten. When electricity meets the filament, some of the energy is turned into light – but quite a lot of it is turned into heat., 2:D - It’s hard to know how many species have become extinct since animals existed, but experts estimate it is more than 5 billion., 3:B - Our taste buds can detect five flavours: sweet, salty, bitter, sour and umami. When we eat, air travels through our mouth and takes scents from the food to our nasal passage. Taste buds and scent receptors send signals to the brain and together they help determine the flavour., 4:C - Experts say there are about 1,850 pandas in the wild and about 600 living in zoos and breeding centres around the world., 5:B - Roman Catholicism is the largest of the three main branches of Christianity. All Catholics are Christian, but not all Christians are Catholic. Catholicism differs from other branches in a few ways, including beliefs about the importance of saints and the Virgin Mary, and the role of the pope.

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.