Life in space 7.9A

What is the greenhouse effect and how does it relate to Earth's temperature?

• The greenhouse effect is the trapping of heat in Earth's atmosphere by greenhouse gases, which helps maintain a temperature suitable for life.

• The greenhouse effect is the cooling of Earth's surface due to the reflection of sunlight by clouds.

• The greenhouse effect is the process of increasing the amount of oxygen in the atmosphere.

• The greenhouse effect is the absorption of heat by the oceans, which leads to a decrease in global temperatures.

Which planet would be the most likely place to observe for life?

• Planet A

• Planet B

• Planet C

• Planet D

What are the key characteristics that make Earth unique compared to other planets in our solar system?

• Earth has a solid surface and no atmosphere.

• Earth has liquid water, a suitable atmosphere, and a stable climate that supports life.

• Earth is the largest planet in the solar system.

• Earth has rings like Saturn.

What characteristic of Earth is most responsible for its ability to support life?

• Proximity to the Sun.

• Presence of a magnetic field.

• Size of the planet.

• Distance from other celestial bodies.

Explain how the tilt of Earth's axis affects its climate.

• It causes seasonal variations in climate, affecting temperature and weather patterns.

• It leads to a constant climate throughout the year.

• It has no effect on climate whatsoever.

• It only affects the climate of the polar regions.

How does the distance from the Sun affect a planet's climate?

• It determines the planet's size and mass.

• It affects the amount of solar energy a planet receives, influencing its temperature and climate.

• It has no effect on the planet's climate.

• It influences the planet's rotation speed.

Why is it important for a planet to be in the habitable zone for life to exist there?

• The habitable zone is where the temperature is just right for life.

• The habitable zone is where planets have the most moons.

• The habitable zone is where planets are closest to the sun.

• The habitable zone is where there is the most water.

What is the most important factor that determines Earth’s temperature?

• Proximity to the Sun

• Distance from the Moon

• Ocean currents

• Volcanic activity

What factors can make a planet uninhabitable?

• Extreme temperatures, lack of water, toxic atmospheres, and high radiation levels

• Mild climates, abundant water, breathable atmospheres, and low radiation levels

• Stable temperatures, rich soil, clean air, and low radiation levels

• High gravity, low temperatures, abundant resources, and clear skies

What role does water play in supporting life on Earth?

• Water is essential for biochemical reactions, temperature regulation, and as a solvent for nutrients.

• Water is primarily used for transportation of organisms.

• Water is only important for aquatic life forms.

• Water serves as a barrier against harmful radiation.