Indicators

Which of the following are indicators of water quality?

• nitrates

• dissolved oxygen

• currents

• pH

• turbidity

Which glass is more turbid?

• The water in the glass on the right is more turbid

• The water in the glass on the left is more turbid

Which best describes a bioindicator?

• a species that has a short life span

• a species that depends on specific conditions to survive

• a species that can adapt to a variety of conditions

• a species that has been introduced to an ecosystem

The ______ ______of bioindicators in a water source indicates that it is healthy.

• Lack of Diversity

• Low Diversity

• High Diversity

• None of the Above

Tags

NGSS.MS-LS2-5

Which of the following is an indicator?

• litmus paper

• cabbage juice

• hydrangea flowers

• all of the above

Which indicator turns pink in a basic solution?

• Methyl orange

• Phenolphthalein

• Litmus

• Bromothymol blue

If the air is badly polluted with sulfur dioxide, a widely used indicator species is used to detect it. That bio-indicator is:

• E. coli

• lichens

• bacteria

• viruses

Which of the following would turn bromothymol blue to a yellow color?

• Vinegar

• Water

• Ammonia solution

• Sodium hydroxide solution

Which factors are most characteristic of a healthy body of water?

• high temperature and low amounts of algae

• low salinity and high turbidity

• high pH and low dissolved oxygen

• low turbidity and high dissolved oxygen

Tags

NGSS.MS-LS2-5

Which of the following are indicators of healthy water systems?

• high nitrates, high pH, and low temperatures

• low temperatures, high dissolved oxygen, and neutral pH