Sci Meth/Measurement Test Review

When experimenting with the growth of a plants, a scientist uses three groups (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control
• Compound

When experimenting with the growth of a plant, a scientist uses three groups (of the same type of) plants, two different fertilizers, equal light, and equal water. What should be in the control set up?

• no fertilizer
• no water
• both of the different fertilizers
• on type of fertilizer

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, what is the dependent variable?

• Type of plant
• Water, apple juice, milk
• Plant growth
• Color of the plant's leaves

An experiment is performed on plants to see how different liquids affect plant growth. Identify some constants between the control and experimental groups?

• Type of plant and type of liquids
• types of liquids and heights of plants
• Amount of soil and amount of sunlight
• Color of the plant's leaves and types of liquids

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 independent variable is

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

How many variables should be tested at a time?

• Three
• Zero
• Two
• One

Why do scientist use the scientific method?

• To make sure they get credit for their discoveries.
• To make sure their results are valid and can be performed by other scientists.
• So that other scientist don't get mad at them

In this graph, what is the dependent variable? 

• Population
• Day
• Species 5

What is the original volume of water in the graduated cylinder?

• 20 ml

• 22 ml

• 24 ml

• 34 ml

To make results in a controlled experiment more reliable, valid, and trustworthy, scientists should

• have large sample sizes

• have multiple trials

• repeat an experiment many times

• all of these responses