Living Environment Review 1: Scientific Method Question Preview (ID: 47385)


Scientific Method. TEACHERS: click here for quick copy question ID numbers.

Why do scientists consider any hypothesis valuable?
a) A hypothesis requires no further investigation
b) A hypothesis may lead to further investigation even if it is disproved by the experiment.
c) A hypothesis requires no further investigation if it is proved by the experiment.
d) A hypothesis can be used to explain a conclusion even if it is disproved by the experiment

Tomato plants in a garden are not growing well. The gardener hypothesizes that the soil is too acidic. To test this hypothesis, the gardener could
a) plant seeds of a different kind of plant
b) move the tomato plants to area with less sunlight
c) change the pH of the soil
d) reduce the amount of water available to the plant

In an experiment to determine the effect of exercise on the pulse rate, a student checks his pulse rate before and after exercising. The purpose of checking his pulse before exercising is that it
a) serves as the conclusion for the experiment
b) is needed to justify the sample size
c) serves as a control for the experiment
d) is needed to formulate a hypothesis

An experiment was carried out to answer the question Does the pH of water affect the growth of radish plants? What was the dependent variable in this experiment?
a) height of the plants
b) pH of the water
c) temperature of the water
d) type of soil

An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin. In this investigation, the independent variable is the
a) control
b) exercise
c) rate of squeezing
d) number of participants

Which statement best describes a controlled experiment?
a) It eliminates the need for dependent variables.
b) It shows the effect of dependent variable on an independent variable.
c) It avoid the use of variables.
d) It tests the effect of a single independent variable.

Researchers performing a well-designed experiment should base their conclusions on
a) the hypothesis of the experiment
b) data from repeated trials of the experiment
c) a small sample size to insure a reliable outcome of the experiment
d) results predicted before performing the experiment

A scientist is planning to carry out an experiment on the effect of heat on the function of a certain enzyme. Which would not be an appropriate step?
a) doing research in a library
b) having discussions with scientists
c) completing a data table of expected results
d) using what is already know about the enzyme

Which structure is best observed using a compound light microscope?
a) a cell
b) a virus
c) a DNA sequence
d) the inner surface of a mitochondrion

Who is the best teacher around?
a) Mrs. Hausman
b) Me
c) You
d) Nobody

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