A hypothesis is

• Something one can prove to be true

• broad

• specific and testable

• a fact

• an observation or natural phenomenon

A theory

• has been substantiated by a large body of evidence.

• is a random guess

• is an educated guess

• is highly specific

• is something one can prove to be true

The experimental group is compared to the _______ because it does not receive treatment.

• Control Group

• Experimental Group

• Control variable

• independent variable

• dependent variable

The _______ receives the treatment or the change.

• Control Group

• Experimental Group

• Dependent variable

• Control variable

• Hypothesis

If I study for my scientific method test, then I will have a better test score. What is the dependent variable?

• Scientific Method
• Studying
• Independent variable
• Test score

If I ride my bike to school instead of walking, then I will get to school faster. I will take the same route. What is the dependent variable?

• The route

• Time

• Riding a bike or walking

• The destination

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, the independent variable is ...

• The type of plant
• The amount of sunlight
• The type of music
• The type of liquid

An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the

• type of soda given to each group
• amount of soda given to each group
•  pulse rate of each group
• age of participants in each group

The graph below shows atmospheric carbon dioxide levels since the year 1880.Which of the following conclusions can be drawn from this graph

•  Atmospheric carbon dioxide levels are responsible for global temperature change.
•  Atmospheric carbon dioxide levels have been rising at about the same rate for the past century.
• Atmospheric carbon dioxide levels have remained the same over the past century.
•  Atmospheric carbon dioxide levels have been rising at an increasingly higher rate as the past century has progressed.

A research group has discovered that damselflies, a type of dragonfly, are being infected by a particular type of aquatic protozoan. Both young and adult damselflies are not directly infected by the protozoan but contract the infection from the prey they eat. The graph shows the percentage of adult damselflies infected by protozoans during the summer and early fall. What do the results indicate?

• Infection in embanked ponds increased during the sampling period.

• Protozoans were more common in creek-fed ponds than embanked ponds.

• Protozoans reproduce more quickly in embanked ponds than creek-fed ponds.

• Infection in creed-fed ponds remained constant throughout the sampling period.