Semester 1 Final Exam Review 2018

What is the part of the experiment that is left alone or “natural", and is used to compare back to?

• Independent Variable
• Dependent Variable
• Control Group
• Experimental Group 

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

• 1
• 2
• 3
• 4

What is a factor that the experimenter has full control over and changes to see what happens?

• Dependent Variable
• Independent Variable
• Control group 
• Hypothesis

What skill is a scientist using when she listens to the sounds that an elephant makes?

• drawing conclusions
• making observations
• interpreting data
• making a hypothesis

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 dependent variable is

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

The yucca plant releases a strong scent at night when the yucca moth is active. The yucca moth, attracted by the scent, gathers pollen from the yucca flower. The yucca moth then deposits her eggs and the pollen on the another plant. This ensures that the plant will be cross-pollinated and that the yucca moth larvae have a steady food supply. Which relationship does this best illustrate?

• commensalism

• mutualism

• parasitism

• predation

Two different populations of birds live in the same area and eat the same types of food. Which most likely describes the relationship between these two populations of birds?

• competition

• mutualism

• parasitism

• predator-prey

Ecosystems are made up of....

• Living things only
• Living and non-living things
• air and nutrients only
• dust particles

In an ecosystem the producers

• use sunlight to make food

• break down dead organisms

• eat the food

• create a food web

All of the living AND non-living things in an particular area is called a(n):

• ecosystem
• house
• community
• mountain