Environment

1% of the atmosphere consists of _____ gases

Which of these causes soil erosion

• Over grazing animals

• Heavy winds

• Logging and Mining

• Trees

......is soluble in water

• Salt

• Stone

• Plastic

• None of these

What is the % of oxygen in air

• 90%

• 21%

• 1%

• 0.03%

The Amazon rainforest gives us 32% of our oxygen

• True

• False

Increasing levels of carbon dioxide in the air is believed to cause ___.

• Global Warming
• Water Pollution
• Non-biodegradable waste
• Recycling

In a sugarwater, .....is a solute

• Sugar

• Water

• Both

• None of these

Percentage of oxygen in the atmosphere??

• 74%

• 29%

• 21%

• 19%

Our environment consist of ___ and ____

• stars and moons

• satellites and planets

• living things and non living things

We should not burn wood and rubbish, because burning produces a lot of _______.

• dust

• fog

• smoke