BIO 1060 -- Exam 1

As the 21st century began, the global human population reached approximately __________ billion.

7

Which of the following is NOT an abiotic factor?

Algae

Scientific study always begins with:

Observations

"Engaging in aerobic activity three times each week will reduce cholesterol levels" is a:

Testable hypothesis

What is an exam of a provisioning ecosystem service?

The avocado grown for food

What is an abiotic factor of the environment?

Water temp

The proposed explanation for a phenomenon is BEST described as:

a hypothesis

Glacial ice reflects sunlight, but when the ice melts, more sunlight is absorbed. As global temperatures rise, more ice melts and more sunlight is absorbed. This is an example of

a positive feedback loop

A hypothesis can best be described as ________.

a proposed explanation based on observation

An ecosystem can be characterized as

all of the biological interactions, plus interactions with the abiotic environment, in a given area.

Scientists investigating a drug to cure a disease in birds conduct experiments. In these experiments, what would be the control group?

birds that do not receive the drug being tested.

In a scientific experiment, a control group:

can be compared with an experimental group to assess whether one particular variable is causing a change in the experimental group.

All the organisms and their physical and chemical environment within a specific area best describes ________.

ecosystems

The First Law of Thermodynamics states that:

energy cannot be created nor destroyed

Resources are ________.

finite

You are given a set of magnets and a variety of metal objects (nail, paperclip, iron filings, copper ring). You test the magnet with all objects and make observations. At the conclusion of your specific observations, you determine the general properties of magnetism. What is your thinking process?

inductive reasoning

The Earth's atmosphere is important because:

it protects us from UV radiation and X-rays.

What is NOT a property of water?

less dense as a liquid than as a solid

Physical laws state that we can recycle:

matter, but not energy

You note a fuzzy growth on some of the gels in your incubator. What is the name given to this step of the scientific method?

observation

In controlled experiments:

one variable is manipulated/changed while others are held constant.

The chemical energy stored in a plant is an example of:

potential energy

Ecosystem services are _________________.

resources and processes upon which human well being and survival depends.

Negative feedback processes tend to function within ecosystems to ________.

stabilize the ecosystem

Homeostasis is

the process by which a system stabilizes after a change.

In a study of texting while driving, drivers drove an obstacle course of cones in a parking lot, either texting or not texting.The number of cones knocked over during each trip was recorded. What is the independent variable?

whether or not the driver was texting

If your hypothesis is rejected, then:

you may still have learned something important about the system you were testing.