Unit 1Test: Chemistry of Life

Susan said, “If I fertilize my geranium plants, then they will have more flowers.”

• recognize a problem

• test the hypothesis with an experiment

• form a hypothesis

• draw conclusions

Tags

NGSS.MS-LS1-5

A systematic approach to solving problems and answering questions.

• scientific method

• controlled experiment

• conclusion

• hypothesis

Tags

NGSS.MS-PS1-2

 

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...

• The type of Plant

• The type of music

• The amount of sunlight

• The type of liquid

Tags

NGSS.MS-LS1-5

The ____ variable in an experiment id the one being deliberately changed by the scientist.

• dependent

• independent

• data

• control group

This part of the experiment serves as a basis of comparison.

• experimental group

• data

• control group

• variables

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Which end of the water molecule has a slightly positive charge?

• the oxygen end
• the hydrogen end
• both ends are slightly positive
• neither end is positive

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

Tags

NGSS.MS-PS1-2

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?

• Water is an acid.
• Water is a versatile solvent.
• Water has a high heat capacity.
•  Water acts as a buffer.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form

• less polar
• more polar
• less dense
• more dense