Science Test Friday

Scientific Method

#1) State the Problem #2) Hypothesis #3) Experiment #4) Conclusion #5) Repeat for valid results

Which statement best describes the best procedure to determine if a vaccine for a disease in a certain bird species is effective?

3. Vaccinate 50 birds, do not vaccinate 50 other birds, and expose all 100 to the diease Topic/Main Idea: VAILD! Supporting Details: Do more experiments Do more times Use more people, etc.

Control

Does not get the variable (ex. No salt)

Design an experiment for Mr. and Mrs. Canale to conduct in order to see which style of dance helps them lose the most weight. In your set up, include the following:

Question being asked- Which dance helps them to lose the most weight? Hypothesis- If they dance the salsa they will lose the most weight Control Experimental No dance dance the salsa, tango, waltz, jive Dependent variable: Same age dancers Same time of day Same environment What data would you collect? Weight loss How would you organize your data? Data table, graph What results should you receive that will support your hypothesis? Doing the salsa was where the people lost the most weight

An investigation was conducted to observe the effects of glucose ingestion on glucose concentration in the blood. An animal was fed 10 milliliters of a glucose solution. At five different times following ingestion of the solution, the blood glucose concentration was determined and the results were recorded in the data table below.

Relationship: Conclusion- As the time after glucose is ingested increases, the glucose concentration in the blood increases and then decreases.

b. What is the variable that is being tested? (use the table below to help write your answer.)

Salt H20

Experimental

The one thing you are testing (ex. Gets salt)

Which of the following answers is not a characteristic of a hypothesis?

a) It is always written in a form of a question.

An experiment was performed to determine the effect of different mineral salts on plant growth. Forty pots containing identical plants were divided into four equal groups and placed in a well lighted greenhouse. Each pot contained a non mineral potting medium and one plant. Materials were then added to each experimental group of pots as shown Which material should be added to the control group of this experiment?

a) Water only

Julia wanted to know which salt solution was best for hatching brine shrimp eggs. She has solutions of salt water she wanted ti test; 6%, 8%, and 10%. a. Write 2 factors that must be kept the same in both the control and experimental groups. (use the table below to help write your answers.)

a. Control Group- Water Same plants. Same container. Same amount of light Experimental Group- Salt Water Same plants Same container Same amount of light (only three from Experimental and Control must be kept the same)

In a scientific investigation, after the question is defined, the next step is most likely

b) formulating the hypothesis

In an experiment, what should be the relationship between the control group and the experimental group?

c) They should be identical in all respects except one.

Which of the following should never be performed while setting up a controlled experiment?

c) Write a conclusion based on results you expect to get during the experiment

When a test tube of water containing elodea (an aquatic plant) is placed near a bright light, the plant gives off gas bubbles. When the light is placed at different distances from the plant, the rate of bubbling is affected. The experimental variable in this demonstration is the

d) Distance of the plant from the light

Organize Data

in Data tables, graphs, charts