WorksheetsNatural Cycles
Total questions: 15
Worksheet time: 8mins
What name is given to oxygen with 3 atoms?
oxide
ozone
oxygen
trioxide
Microbes that can live in the absence of oxygen is called?
aerobic
anaerobic
combustion
nitrides
What cycle is using evaporated water to replenish streams and lakes?
methane cycle
oxygen cycle
water cycle
nitrogen cycle
Which of the following plants is NOT a legume?
Clover
Alfalfa
Peanut
Bluebonnet
Bamboo
The ozone in the upper atmosphere filters what harmful element?
UV rays
Gamma rays
Microwaves
Shock waves
Nitrogen accounts for ____% of the atmospheric air.
30
78
71
5
Only _______% of the earth's water is suitable for human consumption.
1
3
15
43
What is NOT a source of methane production?
animal digestion
melting permafrost
landfills
burning of trees and grasses
burying of rocks
Which organism does NOT contribute to the carbon dioxide cycle?
animals
glaciers melting
burning of fossil fuels
decaying organisms
What plants have symbiotic relationship with microbes to gather (fix) nitrogen?
legumes
mistletoe
epiphytes
vines
The environment is susceptible to which of these?
water pollution
air pollution
noise pollution
all of these.
Which of the following is NOT a water pollutant?
domestic waste
heavy metals
volatile organic compounds (VOCs)
SMOG
Which is NOT a cycle discussed in class?
Methane cycle
Water cycle
Carbon dioxide cycle
Oxygen cycle
Motorcycle
What are some of the examples of heavy metals?
lead
mercury
nickel
all of these.
CH4 is the chemical formula for which natural cycle?
Nitrogen
water
Methane
Carbon dioxide
