Scientific Method Quiz Review HW

Letter

• A

• B

• C

• D

A hypothesis is

• A possible explanation of an observation that can be tested

• a conclusive statement

• a definite answer to a possible problem

• a proven statement

Which statement best describes her hypothesis?

• A student notices fewer robins in her yard during the winter.

• She thinks some robins must migrate in the winter.

• She counts the robins in her yard once a week for 2 years.

• Her research has shown that some robins are not in her yard during winter.

A student collected a sample of a bacterial culture in a test tube. She wanted to prepare a slide of the culture to observe the process of asexual reproduction under the microscope. Which safety measure should the student follow while preparing the slide?

• Wear rubber slippers

• Wear safety gloves

• Use forceps to handle the slide

• Cover table with plastic

What is the dependent variable in this experiment?

• Speed

• Time

• Acceleration

• Car

What is the independent variable in this experiment?

• Mass of radish

• Type of water

• Number of trials

• Type of radish

The diagram shows a setup for a plant investigation. Which variable is most likely being tested?

• Soil volume

• Plant species

• Soil pH

• Hours of light exposure

Select the correct answers for this problem.

• Reasonable

• Not Reasonable

• Because the amount of water doesn't seem to affect plant growth enough to be a factor

• Because the average height of plants in the pot given 30mL of water per day is the highest

• Because the height of plants increases by the largest amount for plants supplied 20 mL per day up to 30 mL water per day.

A student is investigating the effect of plants on indoor air quality and states, "If plants are added to an indoor environment, the air quality will improve." This statement is an example of-

• a theory

• a procedure

• an observation

• a hypothesis

Which question cannot be answered scientifically because the quantity cannot actually be measured?

• How much food does a water buffalo consume in one day?

• How fast can a tiger swallowtail butterfly fly?

• How heavy is a mature female elephant?

• How happy is a chimpanzee when it finds its favorite food?