2️⃣ Air Change In Our Lungs Experiments💦

Question 1

What makes cobalt chloride paper change colour?

Answer 1

Water 💧

Question 2

What colour is normal cobalt chloride paper?

Answer 2

Light pink 🎀

Question 3

When water is added to cobalt chloride paper what colour does it go?

Answer 3

Blue 💧

Question 4

What’s the colour change when water is added to cobalt chloride paper?

Answer 4

Light pink ➡️ blue
🎀 ➡️ 💧

Question 5

What is a way to measure the increase in humidity or water vapour in exhaled air? 😮‍💨

Answer 5

A humidity sensor

Question 6

What is the conclusion about exhaled air 😮‍💨 & water vapour?

Answer 6

Exhaled air contains more water vapour than inhaled air

Question 7

What is the conclusion about the warmth of the air we breathe in and the air we breathe out?

Answer 7

The air we breathe out is warmer than the air we breathe in.

Question 8

How much OXYGEN do we breathe in compared the amount we breathe out?

Answer 8

Breathe in oxygen
21%

Breathe out oxygen
16%

Question 9

How much CARBON DIOXIDE do we breathe in compared the amount we breathe out?

Answer 9

Breathe in carbon dioxide
0.04%

Breathe out carbon dioxide
4%

Question 10

How much NITROGEN do we breathe in compared the amount we breathe out?

Answer 10

Breathe in nitrogen
79%

Breathe out nitrogen
79%

Question 11

How much WATER VAPOUR do we breathe in compared the amount we breathe out?

Answer 11

Breathe in water vapour
A little

Breathe out water vapour
A lot