Water freezes at

• 0°C

• 25°C

• 50°C

• 100°C

The gas we breathe in for respiration is

• Hydrogen

• Nitrogen

• Carbon dioxide

• Oxygen

Main source of Energy for Earth

• Moon

• Stars

• Sun

• Planets

Boiling point of water is

• 50°C

• 100°C

• 75°C

• 90°C

Device used to measure temperature

• Thermometer

• Barometer

• Hygrometer

• Speedometer