Water and Ecosystems Quiz

Which of the following terms is defined as a testable prediction in an experiment?

• Hypothesis

• Independent variable

• Dependent variable

Identify the IV and DV from the following experiment: The Effect of Salt Water on Plant Growth. Independent variable: ________ Dependent variable: ________

• Independent variable: Salt Water, Dependent variable: Plant Growth

• Independent variable: Plant Growth, Dependent variable: Salt Water

• Independent variable: Water, Dependent variable: Salt

• Independent variable: Sunlight, Dependent variable: Plant Growth

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which of the following steps should be completed first when designing an experiment?

• Collecting data

• Gathering materials

• Research the problem

• Write a conclusion

An experiment was conducted to compare the effect of compost of different ages on the growth of plants. The group that used 3 month-old compost grew 2 cm. The group used 6 month-old compost grew 6 cm. The group that used only plain potting soil grew 1.5 cm. What could be a possible conclusion based on this data?

• Older compost results in better plant growth.

• Younger compost is more effective than older compost.

• Plain potting soil is the best for plant growth.

• Compost age does not affect plant growth.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A student conducted an experiment to determine the effects of water temperature on how long fish can live. What are 3 constants for this experiment that are needed to ensure the data collected is valid?

• Type of fish

• Amount of water

• Duration of the experiment

• Water temperature

Which of the following is true about properties of water? (Select ALL answers.)

• Water molecules stick together.

• Water cools rapidly.

• Water retains (keeps) large amounts of heat stored.

• Water frozen can float.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is a hydrogen bond?

• A type of covalent bond

• A weak bond between two molecules

• A bond between hydrogen and oxygen atoms

• A type of ionic bond

Tags

NGSS.MS-ESS2-4

Which of the following terms is defined as the attraction between molecules of different substances?

• Adhesion

• Cohesion

What is meant by surface tension of water?

• The force that causes the molecules on the surface of a liquid to be pushed together and form a layer

• The temperature at which water boils

• The pressure exerted by water vapor in equilibrium with liquid water

• The ability of water to dissolve other substances

Why is it important in water ecosystems that ice is less dense than when it is a liquid?

• It allows ice to float, providing insulation for aquatic life.

• It causes ice to sink, disrupting aquatic ecosystems.

• It makes water evaporate faster, affecting climate.

• It increases the salinity of water, affecting organisms.

Tags

NGSS.MS-ESS2-4