water cycle
1. Which process in the water cycle moves water vapor from plants into the atmosphere?
A. Condensation
B. Transpiration
C. Precipitation
D. Infiltration
B. Transpiration
Which organism is a primary producer in an ecosystem?
A. Lion
B. Grass
C. Frog
D. Eagle
B. Grass
Which pollutant is most common in urban areas due to traffic?
A. Methane
B. Carbon monoxide
C. Pollen
D. Ammonia
B. Carbon monoxide
Which of the following is a renewable resource?
A. Coal
B. Natural gas
C. Wind
D. Oil
C. Wind
What is the main cause of recent global warming?
A. Solar flares
B. Greenhouse gas emissions from human activity
C. Volcanic eruptions
D. Ocean currents
B. Greenhouse gas emissions from human activity
What causes evaporation to occur most rapidly?
A. Low temperature
B. High humidity
C. Strong sunlight
D. Cold air
C. Strong sunlight
Which role do decomposers play?
A. Produce oxygen
B. Break down dead organisms
C. Hunt prey
D. Store energy
B. Break down dead organisms
Why do cities often have higher air pollution levels?
A. More forests
B. More vehicles and industry
C. More rainfall
D. More wildlife
B. More vehicles and industry
Why are fossil fuels considered nonrenewable?
A. They pollute the air
B. They take millions of years to form
C. They are expensive
D. They produce energy
B. They take millions of years to form
Which gas is the largest contributor to global warming?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Helium
C. Carbon dioxide
Which stage of the water cycle forms clouds?
A. Condensation
B. Evaporation
C. Runoff
D. Precipitation
A. Condensation
What is the main source of energy for most ecosystems?
A. Wind
B. Soil
C. The Sun
D. Water
C. The Sun
Which pollution source is more common in rural areas?
A. Car exhaust
B. Factory smoke
C. Agricultural dust and chemicals
D. Subway emissions
C. Agricultural dust and chemicals
Which energy source comes directly from the Sun?
A. Hydropower
B. Wind energy
C. Solar energy
D. Geothermal energy
C. Solar energy
Which activity increases atmospheric carbon dioxide the most?
A. Recycling
B. Burning fossil fuels
C. Planting trees
D. Composting
B. Burning fossil fuels
What happens during infiltration?
A. Water flows over land
B. Water falls from clouds
C. Water enters the soil
D. Water evaporates into the air
C. Water enters the soil
Which term describes all living and nonliving components interacting in an area?
A. Population
B. Community
C. Ecosystem
D. Habitat
C. Ecosystem
Which health problem is commonly linked to air pollution?
A. Asthma
B. Broken bones
C. Hearing loss
D. Tooth decay
A. Asthma
Which of the following is a nonrenewable resource?
A. Biomass
B. Sunlight
C. Uranium
D. Wind
C. Uranium
One major effect of global warming is:
A. Decreasing sea levels
B. Stronger storms and heat waves
C. Thicker ice caps
D. Shorter summers
B. Stronger storms and heat waves
Which of the following best describes runoff?
A. Water soaking into soil
B. Water flowing over land into rivers
C. Water freezing into ice
D. Water vapor cooling into droplets
B. Water flowing over land into rivers
What would most likely happen if all predators were removed from an ecosystem?
A. Prey populations would decrease
B. Plant populations would increase uncontrollably
C. Prey populations would increase rapidly
D. Decomposers would disappear
C. Prey populations would increase rapidly
Why can wildfire smoke affect cities far away?
A. Smoke particles are heavy
B. Wind carries fine particles long distances
C. Smoke dissolves in water
D. Smoke stays in one place
B. Wind carries fine particles long distances
What is one major advantage of using renewable resources?
A. They never run out in human lifetimes
B. They cost more
C. They create more pollution
D. They are harder to use
A. They never run out in human lifetimes
How does melting polar ice affect sea levels?
A. Lowers them
B. Has no effect
C. Raises them
D. Freezes ocean water
C. Raises them