Observations are made using our five sences. We can then use those observations to draw conclusions. Which of the following is an example of a conclusion?
a. "The object is flat."
b. "The flower smells like mint."
c. "Crickets chirp to attract mates."
d. "The food is both sweet and salty."
What is c. "Crickets chirp to attract mates."
100
Scientists want to determine if walls tht are painted a certain color will raise a person's blood pressure. The plan to set up four rooms. Which variable should change in each room?
a. the color used
b. they type of room used
c. the instruments used to test the blood pressure
d. the amount of time the person spends in the room
What is a. the color used.
100
Which tree items can be classified together?
a. pencil, ruler, chalk
b. pencil, pen, chalk
c. ruler, pen, chalk
d. pencil, ruller, pen
What is b. pencil, pen, chalk.
200
Scientists are not the only ones who gather information. Which way of gathering information do ONLY scientists use?
a. reading
b. observing
c. recording
d. experimenting
What is d. experimenting.
200
Sandy observes the phase of the moon during a two-week period. She sketches and labels the phases and shares her drawings with the class. Which statement best describes Sandy's investigation?
a. It involves modeling.
b. It involves experimentation.
c. It involves repeated observations.
d. It involves both experimentation and repeated observations.
What is c. It involves repeated observations.
200
Sometimes, the results of na investigation are not what was expected. When this happens, what should a scientist do?
a. Change the results.
b. Defend the results as correct.
c. Plan another investigation to test the results of the first one.
d. Ignore the first set of results and plan a different investigation.
What is c. Plan another investigation to test the results of the first one.
300
Why do scientist repeat their experiments?
a. to avoid making mistakes
b. to throw out the information they collected earlier
c. to develop a new procedure that they can use later
d. to make sure that the information they collect is reliable
What is d. to make sure that the information they collect is reliable.
300
Scientists include controls in their experiments. Why is a control important?
a. It helps scientists share results.
b. It helps scientists form their firts hypothesis.
c. It helps scientists record their repeated observations.
d. It helps scientists compare their results to a standard.
What is d. It helps scientists compare their results to a standard.
300
Sameh's friends wanted to see a different movie than he did. To get his friends to see the movie he wanted, Sameh told them about the exciting preview he saw. In scientific terms, which of the following BEST describes what Sameh was doing?
a. predicting
b. giving his opinion
c. stating a conclusion
surveying his friends
What is b. giving his opinion.
400
Asa watches his mom rub soap on her finger to helph er get a ring unstuck. He thinks that the soap must reduce friction. He designs an investigation to test his theory. He pulls weight across a board and records the force with a spring scale. He then puts soap on the board and pulls the weight again. Which of the following variables is Asa measuring?
a. the speed with which the weight is pulled
b. the amount of weight being pulled
c. the force needed to pull the weight
d. the type of surface the weight is being pulled across
What is c. the force needed to pull the weight.
400
A teacher writes the following note on a student's experimental design. "You did not identify and control variables." Why is it important to identify and control variables?
a. because a scientist must observe data.
b. because a scientist must form a hypothesis
c. because a scientist must know which variable causes change
d. because a scientist must know which variable to use for making a model
What is c. because a scientist must know which variable causes change
400
A doctor says that drinking two glasses of milk in the morning will give students more energy. Which of the following would be good scientific evidence for or against the doctor's claim?
a. a brochure from the doctor stating the benefits of milk
b. data from scientific investigations about drinking milk in the morning
c. a TV advertisement that drinking milk in themorning gives people plenty of energy
d. statements from five people about how drinking milk in the morning gives them energy
What is b. data from scientific investigations about drinking milk in the morning.
500
Different systems for making measurements use different units. Which system of measurement is generally used by scientists?
a. customary
b. English
c. Imperial
d. metric
What is d. metric.
500
When Andrew conducts an investigation, he repeats the investigation several times. Why does Andrew do this?
a. to create inventions
b. to get concsistent results
c. to do the work very safely
d. to be sure the work is correct
What is b. to get concsistent results.
500
Michael rides a bike made by Company A. Luis rides a bike made by company B. How can Michael and Luis determine in a scientific way whose bike had tires that last longer?
a. Read information about the tires from each manufacturer.
b. Ask ten classmates who ride each bike which tires last longer.
c. Each student shoudl ride their own bike for 25 days, then compare the tires.
d. Use a machine to test the bikes in the same way for 25 days, then compare the tires.
What is d. Use a machine to test the bikes in the same way for 25 days, then compare the tires.