Scientific Method

This graph shows how temperature affects the volume of a new polymer gel that may be useful in sorting DNA fragments using gel electrophoresis.What can be inferred from the results of the graph? 

• Temperature is directly proportional to the volume of a given mass.
• Temperature is inversely proportional to the volume of a given mass.
• Mass is destroyed as the temperature increases.
• The energy is lost as the volume increases. 

Which of the following would be considered quantitative data?

• Color
• Smell
• 6.84 cm
• texture

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Explaining the color of a chemical would be what kind of observation?

• Qualitative 
• Quanitative

You will want your experiment to have ____ manipulated variable(s) in it for the experiment to be valid.

• 1
• 2
• 3
• 4

Mario studied how far room temperature water would spurt out of a plastic milk carton when 3mm holes were punched at different heights from the bottom of the container. Identify the RESPONDING variable
-3mm holes
-Distant water traveled out of carton
-Different heights of the holes in the container
-Ice water from Iceland

• 3mm holes
• Distant water traveled out of carton
• Different heights of the holes in the container 
• Ice water from Iceland

The following statement is a hypothesis formed about marsh grass: 
If the amount of nitrogen marsh grass receives is increased, then the height of the grass will increase, because nitrogen is an essential nutrient needed for marsh grass to grow.
What is the manipulated variable of the statement above? 

• Height of grass
• Amount of nitrogen
• Essential nutrient
• Amount of growth

A scientist hypothesizes the the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The manipulated variable is

• the male alligators
• the incubator
• the gender of the alligator
• the temperature

A scientist hypothesizes the the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The responding variable is

• the size of the baby alligators
• the gender of the baby alligators
• the incubator
• the temperature

prediction about the outcome of an experiment

• hypothesis
• manipulated variable
• responding variable
• controlled experiment

The list of items needed for an experiment are the ______________.

• conclusion
• materials
• variables
• hypothesis