Grade 4 : Our Environment and Pollution

___ is everything that makes up the surroundings of a living thing.

• Environment
• Biodegradable Waste
• Pollution
• Atmosphere

___ is the contamination or dirtying of the environment by the discharge of harmful substances into the air, water, or soil.

• Pollution
• Environment
• Biodegradable waste
• Unicorns

The burning of fuels in houses, factories, and vehicles adds smoke and poisonous substances to the environment, causing ____.

• Air pollution
• Water pollution
• Land pollution
• Waste

Waste from our homes and factories are dumped into rivers, lakes, and seas, causing ____.

• Air pollution
• Water pollution
• Land pollution
• Waste

Wastes are also often thrown or buried, causing ____.

• Air pollution
• Water pollution
• Land pollution
• Waste

Any material that is no longer useful to us is called ____.

• Air pollution
• Water pollution
• Land pollution
• Waste

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

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

Another name for global warming is ___.

• Climate change
• Global Hotflash
• Solar Wind
• Climate Heating

According to the theory of global warming, gases like carbon dioxide and methane trap __, thereby increasing the Earth's temperature.

• Polar bears
• Heat
• Waste
• Light

Land pollution is also caused by excessive use of ___.

• Electricity
• Noise
• Pesticides
• Cars