Global Warming and Greenhouse Effects

The video discusses global warming, its causes, and effects. It explains the greenhouse effect, highlighting how gases like carbon dioxide and methane trap heat, leading to increased Earth temperatures. The video warns of dangers like ice melting and rising sea levels. It suggests solutions such as recycling, using solar energy, and planting trees. It also compares Earth's situation to Venus, where a runaway greenhouse effect has led to extreme temperatures.

What is one of the main concerns scientists have about global warming?

• It makes Earth too cold.

• It could make Earth dangerously warm.

• It increases the number of earthquakes.

• It causes more volcanic eruptions.

What is the primary cause of global warming?

• Reduction in Earth's magnetic field.

• More frequent volcanic eruptions.

• Increase in greenhouse gases.

• Decrease in solar activity.

Which of the following is NOT a greenhouse gas?

• Nitrous oxide

• Oxygen

• Carbon dioxide

• Methane

How does a greenhouse trap heat?

• By cooling the air inside.

• By reflecting sunlight back into space.

• By absorbing all sunlight.

• By allowing sunlight in and preventing warm air from escaping.

What happens when ice caps melt due to global warming?

• Sea levels remain the same.

• Sea levels fluctuate randomly.

• Sea levels decrease.

• Sea levels rise.

Which human activity is a major contributor to global warming?

• Deforestation

• Recycling

• Planting trees

• Using solar panels

What is one way individuals can help reduce carbon emissions?

• Drive more frequently.

• Cut down more trees.

• Recycle household waste.

• Use more plastic bags.

What is a benefit of using a fuel-efficient vehicle?

• It gets more kilometers per liter.

• It reduces the need for public transport.

• It requires more maintenance.

• It increases carbon emissions.

How can planting trees help combat global warming?

• By releasing more carbon dioxide.

• By increasing soil erosion.

• By reducing oxygen levels.

• By absorbing carbon dioxide.

What makes Venus an example of a runaway greenhouse effect?

• Its atmosphere traps excessive heat.

• It has no greenhouse gases.

• It has a very low surface temperature.

• Its atmosphere is mostly nitrogen.