Scientific Method/Characteristics of life

Some researchers are developing a new fertilizer designed to improve the growth of plants in hot, dry climates. The fertilizer was applied to one hundred desert plants in a greenhouse. The average daytime temperature in the greenhouse was 90°F, and the humidity levels were low. Which is best for the researchers to do next?

• A compare plants that received fertilizer to similar plants that received none

• B begin selling the fertilizer to gardeners living in hot, dry climates

• C change the conditions in the greenhouse and retest the fertilizer

• D test the fertilizer on plants that are adapted to cooler climates

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A scientist investigates the effect of carbon dioxide on plant height. The scientist grows plants in several closed containers. All the plants receive the same amounts of water and light, but the air in each container has a different amount of carbon dioxide. What is the independent variable in this experiment?

• the amount of carbon dioxide in each container

• the number of plants in each container

• the amount of water provided to the plants

• the height of each plant after a period of time

Tags

NGSS.MS-LS1-5

Which is NOT a step in the scientific method?

• Make observation
• Form a theory
• Collect data
• Form a hypothesis

Tags

NGSS.MS-PS1-2

A testable explanation to a problem that has not yet been tested. 

• data
• theory
• hypothesis
• fact

Tags

NGSS.HS-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 amount of sunlight
• The type of music
• The type of liquid

Dependent variable means

• the scientist controls what to test
• educated guess
• ask a question
• what is being measured

Tags

CCSS.6.SP.B.5B

This is the group that is affected by the independent variable or the group that is changed.

• Control Group
• Experimental Group
• Changed Group
• Cool Group

In a controlled experiment, how many variables can be worked with at a time? 

• one
• none
• two or more
• how ever many makes sense.

How many constants can you have in an experiment?

• 1

• 2

• 3

• as many as needed

When a baby kitten becomes an adult cat, this is an example of...

• energy metabolism
• growth and development
• response to stimuli
• having cells

Tags

NGSS.MS-LS1-5