The Earth
What are the four spheres?
Lithosphere, hydrosphere, biosphere, atmosphere
How does burning coal effect the carbon cycle?
Puts more carbon dioxide into the atmosphere putting the carbon cycle out of balance.
What is the process when water on Earth is heated up and converts into vapour in the atmosphere?
Evaporation
The process where the Earth's atmosphere traps heat from the Sun to warm the Earth.
The Greenhouse effect
What are stars mostly made of?
Hydrogen
Which sphere relates to soil and rocks?
Lithosphere
How does cutting down trees effect the carbon cycle?
Trees take in carbon dioxide and by cutting them down less carbon dioxide is absorbed and the carbon cycle is unbalanced.
What is the process called when the vapour in the atmosphere cools down and turns into clouds?
Condensation
What are two affects of global warming?
-increase in temperature of the Earth
-ice caps and glaciers melting causing rising water levels
How long will the Sun live for?
ten billion years
Which sphere relates to water in all forms?
hydrosphere
How does using renewable energy sources effect the carbon cycle?
Less carbon dioxide is released into the atmosphere and the carbon cycle is kept balanced.
What is the process called when rain hits the ground and runs into rivers and lakes?
Collection
What are two human causes of global warming?
- burning fossil fuels
- deforestation
A light year is a measure of...
distance
Which sphere relates to gases around us?
Atmosphere
What is the process called when trees take in carbon dioxide and release oxygen?
photosynthesis
What is the process called when water falls from the atmosphere to the Earth's surface in the form of rain, snow, sleet, or hail?
Precipitation
How does replanting forests help slow down the process of global warming and effect the carbon cycle?
More forests means more trees to take in carbon dioxide from the atmosphere and release more oxygen balancing the carbon cycle.
What kind of galaxy is the Milky Way?
Spiral
Which sphere relates to all living things?
biosphere
What is the process called when humans and animals breathe out carbon dioxide?
respiration
What percentage of the Earth's water is freshwater available for human consumption?
Less than 1%
List two possible energy sources that do not produce greenhouse gases.
- solar
- wind
-water
-electricity
What is the speed of light?
3 x 108 m/s