Water is made up of what molecules?

• Helium and oxygen

• Hydrogen and oxygen

• Hydrogen and carbon

• Chlorine

Answer explanation

Tags

NGSS.MS-PS1-1

When you add things like drink mix or sugar to water, they seem to vanish, as the water dissolves them. What is this property of water?

• Water acts as a solute.

• Water hides the sugar or drink mix.

• Water acts as a solvent.

• Water washes away the sugar or drink mix.

"The water is cloudy and smelly."

The statement above shows the ________ property of water.

• physical

• chemical

• biological

We can obtain our FRESHWATER resources from a variety of options listed below, EXCEPT...

• River and lakes

• Rain and groundwater

• Dams and reservoirs

• Ocean

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-1

What is the importance of clean water?

• Recreational

• Drinking

• Development

• All of these

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

We have ___ parameters for the Water Quality Index (WQI).

What should we do BEFORE collecting our samples for analysis? Select two of the correct answers.

• Wear proper attire (Wader suit)

• Prepare equipment

• Collect samples

• Curate samples

We have introduced the equipment used to test the water quality on-site (eg. pH, temperature, total dissolved oxygen). What is it called?

• Multiparameter

• Thermometer

• pH meter

• DO meter

This is a kick net. A kick net is used to collect samples of ______ .

• Fish

• Bird

• Reptiles

• Stream macroinvertebrates

This is a coliform test kit. It could help us to detect the presence of ________ in our water samples.

• Virus

• Chemical

• Oxygen

• Bacteria