Scientists At Work Question Preview (ID: 54409)


Big Idea 1: The Practice Os Science Big Idea 2: The Characteristics Of Scientific Knowledge. TEACHERS: click here for quick copy question ID numbers.

Scientists include controls in their experiments. Why is a control important?
a) It helps scientist share results
b) It helps scientist form their first hypothesis
c) It helps scientist record their repeated observations
d) It helps scientist compare their results to a standard

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

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 has 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) Have each student 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, the compare the tires

Samara observes and sketches the phases of the moon during a five -week period . her drawings are shown here.
a) It involves modeling
b) It involves experimentation
c) It involves repeated observations
d) it involves both experimentation and repeated observations

Sometimes the results of an investigation are not what were 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

Why do scientists repeat their experiments
a) To avoid making observations
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

Different systems for making measurements use different units. Which system os measurement is generally used by scientist?
a) Customary
b) English
c) Imperial
d) Metric

Observations are made using the five senses. We can use observations to draw conclusions. Which of the following is a conclusion? a. the object is flat b. the flower smells like mint c. Cricket chirp to attract mates d. the food tastes salty
a) The object is flat
b) The flower smells like mint
c) Cricket chirp to attract mates
d) The food tastes salty

Scientists want to determine if walls that are painted a certain color will raise a person's blood pressure. They plan to set up four rooms. Which variable should change in each room?
a) The color used
b) The type of room used
c) The instruments used to test the blood pressure
d) The amount of time the person spends in the room

The information that scientists collect as they investigate the natural world is
a) Microscopic
b) Spring scale
c) Opinion
d) Evidence

Objects that are too small to see with your eyes alone are
a) Microscopic
b) Spring scale
c) Opinion
d) Evidence

Jaime wants to find out how much force it takes to pull a toy car up a ramp. The tool he should use is
a) Microscopic
b) Spring scale
c) Opinion
d) Evidence

A belief or judgement that is not supported by investigation is an
a) Microscopic
b) Spring scale
c) Opinion
d) Evidence

Josh has been growing plant that received 1/2 cup of water two times per week. Now he wants to see what happens when the amount of water is reduced. which plant is the control ?
a) Plant 1 - 1/2 cup two times per week
b) Plant 2 - 1/2 cup once per week
c) Plant 3 - 1/2 cup once every two weeks
d) Plant 4 - no water

Jane wants to measure the mass of a rock. The tool she should use is an
a) Balance
b) Control
c) Experiment
d) Variable

Any condition in an experiment that can be changed is an
a) Balance
b) Control
c) Experiment
d) Variable

The setup to which you compare all the others in an experiment is the
a) Balance
b) Control
c) Experiment
d) Variable

An Investigation in which all conditions are controlled
a) Balance
b) Control
c) Experiment
d) Variable

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 investigation about drinking milk in the morning
c) a TV advertisement that drinking milk in the morning gives people plenty of energy
d) statements from five people about how drinking milk in the morning gives them energy

When Andrew conducts an investigation, he repeats the investigation several times. Why does Andrew do this?
a) to create inventions
b) to get consistent results
c) to do the work very safely
d) to be sure the work is correct

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