Why is typical rain a little acidic?
A. due to presence of dust in the air
B. carbon dioxide & water in clouds react to form carbonic acid
C. Ozone depletion
D. All of these
What should oxygen (DO) dissolved in water be?
A. 400 to 800 ppm
B. 4000 to 8000 ppm
C. 0.4 to 0.5 ppm
D. 4 to 5 ppm
The investigation of living things and their surroundings is known as ?
A. Acoustics
B. Ecology
C. Ichthyology
D. None of these
Insect science is referred to as .
A. Ichthyology
B. Entomology
C. Zoology
D. Botany
Fish studies are referred to as ?
A. Entomology
B. Ichthyology
C. Ecology
D. None of these
The mass of the earth is ?
A. 5.972 × 1024 kg.
B. 6.972 × 1024 kg
C. 7.972 × 1024 kg
D. 8.972 × 1024 kg
What is the surface temperature of the sun?
A. 5,778 Kelvin
B. 6,778 Kelvin
C. 7,778 Kelvin
D. 9,778 Kelvin
A dolphin uses its sense of _____ to perceive its surroundings
A. Sight
B. Sound
C. Both of these
D. None of these
Households now frequently use UPS. What is UPS an acronym for?
A. Uniform Power Storage
B. Universal Product Support
C. Under Panel Storage
D. Uninterruptible Power Supply
Around _______ million kilometers separate the Sun from Earth on average.
A. 100 million
B. 150 million
C. 200 million
D. 250 million