Homework Assignment on Climate Change - Grade11

The gas that is most abundant in the atmosphere is

• oxygen
• nitrogen
• carbon dioxide
• argon

Which of the following is NOT a greenhouse gas?

• methane
• carbon dioxide
• oxygen
• water vapor

A natural process in which certain gases in the atmosphere keep heat near Earth and prevent it from radiating into space is known as

• photosynthesis.
• ozone depletion.
• cellular respiration.
• greenhouse effect.

How do scientists collect evidence about climate? 

• using remote sensing from space with satellites
• by ground-based measurements of surface temperatures, carbon dioxide concentration and sea level
• by collecting “proxy data” from tree rings, ice cores, and historical records
• all of the above

Which season is shown in the northern hemisphere?

• winter
• spring
• summer
• fall

Visible light reaches Earth’s surface while infrared light is trapped as heat. Which characteristic of Earth’s atmosphere causes this to happen?

• the hole in the ozone
• the greenhouse effect
• atmospheric pressure
• the inversion layer

The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

• lower levels of ozone in the atmosphere
• lower levels of nitrogen in the atmosphere
• higher levels of carbon dioxide in the atmosphere
• higher levels of oxygen in the atmosphere

El Nino occurs when the tropical ocean waters are warmer in which ocean?

• Atlantic
• Indian
• Pacific
• Arctic

Factors that can influence climate change are:

• greenhouse gases only
• greenhouse gases, ozone depletion, and latitude
• greenhouse gases, latitude, and sunspot cycles
• sunspot cycles, ozone depletion, and latitude

Over the past 200 years, the level of carbon dioxide in the atmosphere has

• decreased slightly
• increased until recently, and then decreased
• increased steadily
• stayed about the same