Question

physical science: semester exam

1. what is the scientific method?

a. a scientific way to design a graph
b. a process used by scientists to explore observations and answer questions.
c. the study of dinosaurs digesting their food.
d. a list of materials for a science experiment.
e. a method for designing a product to sell.

1. measurements or observations collected and recorded in an experiment or investigation.

a. data
b. notes
c. answers
d. hash tags

1. which of the following would make sure experimental results were valid.

a. add bias
b. communicate unsure results
c. pick two hypotheses
d. conduct multiple trials

1. before starting any lab, you should ______ first.

a. smell all the lab materials
b. locate safety equipment
c. write the lab conclusion
d. get a calculator

1. what should you do when you spill chemicals on the floor.

a. clean it up
b. look at it
c. inform classmates
d. tell teacher

1. what is the first step of the scientific method?

a. collect and analyze data
b. conduct the experiment
c. the problem to be investigated
d. draw a conclusion based upon the observations

Explanation:

Question 1

The scientific method is a process scientists use to explore observations and answer questions. Option A is incorrect (not about graph design), C is about dinosaur digestion (not scientific method), D is a list of materials (not the method), E is about product design (not scientific). So B is correct.

Measurements/observations collected in an experiment are called data. Notes are not specific to experiment records, answers are results of analysis, and hash tags are irrelevant. So A is correct.

Conducting multiple trials reduces error and increases validity. Adding bias (A) reduces validity, communicating unsure results (B) doesn't ensure validity, picking two hypotheses (C) is not a validity measure. So D is correct.

Answer:

B. A process used by scientists to explore observations and answer questions.

Question 2