Social Studies Final Revision Grade 6 Semester 2

Nitrogen is the main gas that makes up the majority of the Earth's atmosphere.

The percentage of oxygen in the air is 21%.

Fish under the water breathe dissolved oxygen.

Weather changes over a long period of time, while climate changes from one day to another.

Cloudy or windy condition on one day is an example of climate.

Barometer is used to measure air pressure.

Desert plants are likely to grow in a polar climate.

Anemometer is used to measure wind speed.

The weather changes during a long period of time.

Troposphere is the closest atmospheric layer to the earth.