A group of scientists in the Everglades are studying a heron population. They are in the birds' natural setting, but they don't want to interfere with the birds. What type of research are they performing?

A a controlled experiment

B opinion-based research

C a tab investigation

D observational research

Explain the experiments G. F. Gause conducted on competition in Paramecium . What were the results of these experiments?

Why do scientists need to have their experiments reviewed by other scientists before they are published?

A to get popular support

B to warn the public

C to identify sources of error

D to get published more quickly

What is the abstract of a scholarly article?

Calculate If your calculator is $5$ centimeters wide, what is its width in millimeters?

What is a hypothesis?

A a possible answer to a scientific question

B a method for studying the natural world

C a system of measurement

D a fact

Review The basic SI unit of time is _____.

Find the range for this set of data: $22,36,7,19,56$

A $28$

B $49$

C $7$

D $22$

The metric system is a measurement system based on the number

a. $1$.

b. $10$.

c. $100$.

d. $1000$.

I get it! Now I know that different types of scientific investigations include _____.

I need extra help with _____.

Apply Concepts Think like a scientist to find out about whale songs. Answer these questions.

What are at least three types of data you could collect to test your hypothesis?

How do scientists investigate the natural world.

Identify Asking a group of people what they think of an environmental issue is an example of what type of research?

A student performs an experiment to find out if adding 1 teaspoon of salt to a bubble solution of soap and water affects bubble making.

Draw Conclusions Write a hypothesis for this experiment.