In an experiment, the variable observed to determine the results is the ___?___ variable.

What are the soil horizons?

• topsoil

• subsoil

• bedrock

• all of the above

___?___ are nourishing substances.

Tags

NGSS.MS-LS2-1

The substance of the physical world is known as ___?___.

• nutrients

• minerals

• matter

• humus

Tags

NGSS.MS-PS1-5

(True or False. If false, correct the CAPITALIZED word to make the statement true.)

The CONTROLLED variable remains same throughout an experiment. ________________________

• true

• false

In what type of soil do plants grow best? ___?___ or slightly acidic

Tags

NGSS.MS-LS1-5

What are the three primary plant food elements?

• POTASSIUM, IRON, NITROGEN

• NITROGEN, POTTASSIUM, PHOSPHORUS

• CALCIUM, PHOSPHORUS, NITROGEN

• 
  POTASSIUM, PHOSPHORUS,

  Humus

Tags

NGSS.MS-LS2-1

___?___ is the study of matter and the movement of God’s physical world.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

___?___ cylce is nature's way of recycling nitrogen, a gas that is important for all living things.

Tags

NGSS.MS-LS2-3

What bacteria converts nitrogen into ammonia and nitrates?

• denitrifying bacteria

• fixing bacteria

• nitrogen-fixing bacteria

• none of the above