The greenhouse effect
Grade 9 Science Worksheet - Building Confidence
Circle the best answer.
Read this first
Use this
Sunlight arrows in, and infrared arrows going up, back down and out to space.
What is the natural greenhouse effect, by Ari's reading (NASA)?
- Clouds reflect sunlight back down so each ray lands twice
- Gases store heat for good, so heat stops leaving Earth
- The ozone layer blocks most sunlight from reaching the ground
- Gases absorb heat from the ground and send some back down
About what is Earth's average surface temperature with the natural greenhouse effect, by Bo's reading (NASA)?
- About 0 °C
- About 15 °C
- About 5,500 °C
- About 100 °C
With no atmosphere, how would Earth's surface compare with today, by Kira's reading (NASA)?
- About the same, since the Sun alone sets the temperature
- More than 30 °C colder than today
- Warmer, since air blocks sunlight from the ground
- About 1 °C colder than today
Which gases are transparent to outgoing thermal infrared, by Jun's reading (NASA)?
- Carbon dioxide and methane
- Oxygen and nitrogen
- Methane and water vapor
- Water vapor and carbon dioxide
Which list names three greenhouse gases, by Luz's reading (NASA)?
Use the picture in question 4.
- Nitrogen, oxygen and carbon dioxide
- Helium, neon and oxygen
- Oxygen, nitrogen and argon in the air
- Water vapor, carbon dioxide and methane
NASA names the atmosphere's most abundant greenhouse gas. Which is it, by Milo's reading?
Use the picture in question 4.
- Methane
- Nitrogen
- Oxygen
- Water vapor
Use this
Sunlight arrows in, and infrared arrows going up, back down and out to space.
Sunlight arrives mostly as visible and near-infrared light. What does Earth's surface give off, by Noah's reading (NASA)?
- Thermal infrared (heat)
- Nothing, since the ground just absorbs light
- Ultraviolet light, brighter than sunlight
- Visible light, like the Sun gives off
Why does Earth's surface give off infrared rather than visible light, by Pia's reading (NASA)?
- Its infrared is sunlight reflected off clouds
- It is far cooler than the Sun, about 15 °C
- Greenhouse gases paint the ground a darker color
- It is hotter than the surface of the Sun
Which energy do greenhouse gases mostly absorb, by Ren's reading (NASA)?
- Most visible sunlight, before it reaches land
- Radio waves arriving from space
- Outgoing thermal infrared from the surface
- Sound waves rising from the ground
Energy flows as a share of incoming sunlight (NASA)
Flow Share of incoming sunlight Reflected to space 29% Absorbed by the atmosphere 23% Absorbed by the surface 48% Infrared up from the surface 117% Infrared back down to the surface 100% Infrared from the surface straight to space 12% Infrared from the atmosphere to space 59% Using the table, what share of incoming sunlight does Earth's surface absorb, by Tala's reading (NASA)?
- About 29%
- About 23%
- About 48%
- About 117%