Scientific Methods
Which step involves reading books or asking experts to learn what is already known about the question?
Research the topic.
Which variable is the one a scientist changes on purpose in an experiment?
Independent variable.
What is an observation?
This is a statement you make using your five senses to notice details about the world around you.
What does "SI" stand for in measurement?
International System of Units
Define Scientific Method?
The process or steps taken to produce reliable results to answer a specific question.
Write the "If...then..." statement that scientists use to show an educated guess. What is that statement called?
Hypothesis
What do we call variables that must stay the same so the test is fair (like same size of ball, same drop height)?
Answer: Control variables (constants).
The cat is arching its back and hissing." Is this an observation or an inference, and why?
A. It is an inference because you are assuming the cat is angry.
B. It is neither because it tells a fictional story.
Give a metric unit of measurement for mass, height, temperature.
gram or kilogram
meter
Celsius
Define different Variables?
Independent Variables: Things that change on purpose in the experiment
Dependent Variables: That we measured or observing in the experiment
Control Variable: That remain same through out the experiment
Which step comes after conducting the experiment, when scientists look at their recorded measurements to decide if the hypothesis was supported?
Answer: Analyze data
If athletes drink gatorade then their performance will increase because gatorade supplies energy to the body.
What is the dependent variable
Increase athletic performance
Give any 2 differences between Qualitative and Quantittaive Observation
1.Quanlitative
a. Deals with descriptions.
b. Data can be observed but not measured.
2. Quantitative Observation
a. Deals with numbers.
b. Data which can be measured like Length, height, area, volume etc
1. SI units of temperature
2. SI units of intensity of light
1. Kelvin
2. Candela
Define Measurement?
Measurement is the process of finding the size, amount, length, quantity, or temperature of something by comparing it to a standard unit.
List the 7 steps scientist use as scientific methods to solve a problem.(in order)?
Observe->Ask a question → Research about Topic →Make hypothesis → Test hypothesis → Collect and record data → Analyze data →Draw Conclusion and share answers. (last 2 steps may be different)
Leo tests how the weight of a toy car affects how fast it rolls down a ramp. What is the dependent variable?
A. The weight of the toy car.
B. The height of the ramp.
C. The speed of the toy car.
C. The speed of the toy car
Joey noticed the ground was wet after his class. He told his friend that the sprinklers must have come on. What process did Joey use?
He was Inferring
A beaker contains 0.75 liters of water. Express this volume in milliliters (mL).
0.75 L=750 mL
Define Hypothesis
An Educated guess or prediction about what you think will happen
Explain briefly why scientists repeat experiments or have others repeat them.
Answer: To make sure results are reliable and not just due to chance or mistakes.
If the ball is thrown over the roof then it will fall into the street and cause an accident.
What is the independent variable?
Ball being thrown into the street
What is the key to making good observations?
Including many details
Convert: 3,200 milligrams (mg) to grams (g).
Answer: 3,200 mg= 3.2 g
1. Define Graphs
2. Which type of graph is best for showing changes or trends in data over a period of time
1. A graph is a tool scientists use to display data and communicate results from an experiment.
2.Line Graph