ls test 1
Terms in this set (56)
How does a life scientist think using Scientific Investigations and the Scientific Method?
they use their 5 senses to observe and measure the world around them and create scientific explanations
What does Life Science of biology mean?
the study of living things called organisms
What are the 6 characteristics of a good scientist?
careful observation, curious, creative, logical, skeptical, objective
List the steps of the scientific method IN ORDER
purpose or question, form a hypothesis, test the hypothesis, analyze results, draw a conclusion, communicate results
The purpose is the ________________ you want to answer or the __________________ you want to solve
The kind of evidence all can observe, is measurable and obtained through the 5 senses is called __________________ evidence
Empirical evidence leads to _______________ _________________ which are descriptions HOW a process in nature occurs in the natural world
Looking for valid information regarding the parts of the question or variables is
The scientist determines his variables and FORMS A HYPOTHESIS or an _____________________ _____________ about what will happen
The hypothesis should be written as an "___ .........., ______ ............" statement
_____ ________________ __________________ should be in the "IF" part of the statement
the independent variable
_____ ____________ _____________ should be in the "THEN" part of the statement
the dependent variable
The IV is the variable that is
Question to ask yourself for IV
What is changing or what is different among the groups?
DV is the variable being
Question to ask yourself for DV
What is being measured as a result or effect?
Constants or controlled variables are the ones that ____ _____ ____________ OR ______ ____ ______ between the groups
do not change, stay the same
Question to ask yourself for the CV
What is the same about the groups?
1 step of testing the hypothesis
make a material list of items needed for experiment
Set up ___________ groups and an _______________ groups if needed for comparison
Test the hypothesis by following a step by step _________________
YOU MUST ________________ THE STEPS WHEN TESTING YOUR HYPOTHESIS
Each step begins with a
Be specific about what ________ , how _________, or how ___________
kind, much, many
Include your controlled variables as well as how to test the ________________ variable
Determine what you will use to measure and be specific about how to ___________ the dependent variable (what tools, how to use tools, etc.) and include scale used
Make sure you end with..............
what to compare!
Question to ask yourself when comparing
What groups are we comparing and what?
Collect measurements of _______________ ________________ and __________ data during an experiment
dependent variable, record
In the analysis of results, it is important to represent the data on a __________ and explain what the results show on the ______________
Charts and diagrams
flow charts, venn diagram, cycle diagrams
Use a line graph when you are
showing data over time or a progressing #
Use a bar graph when
the IV is different kinds or groups of something
What 2 statements are important to include in the conclusion of an experiment?
repeat your hypothesis, state whether your hypothesis was supported or not
How can results be communicated in the scientific community?
orally or written
Define the SI System of Measurement
based on units of 10, modern metric system, universal
What is the SI System based on?
the metric system
What are the advantages of using the SI System of Measurement?
it is reliable, accurate, universal, and based on units of 10
Describe the units and tools used for measuring length
cm, m, ruler
Describe the units and tools used for measuring liquid volume
liters, milliliters, beaker, graduated cylinder
Describe the units and tools used for measuring solid volume
Describe the units and tools used for measuring mass
grams, triple beam balance, kg
Describe the units and tools used for measuring temperature
celsius or kelvin, thermometer
How do you find the area of an object?
length times width
the amount of space something occupies or contains
How do you find the volume of a square box?
length times width times height
How do you find the volume of an irregular object?
measure the amount of water it displaces
What do you have to convert when finding the volume of an irregular object?
1 mL of water = 1 cc (1cm cubed); the amount of water displaced to cubic centimeters
The prefix "milli" means
How many milliliters are in 1 liter?
The mass of an object is
how much matter something has
The mass of a medium apple is
The temperature scale used in science is
Normal body temp. is
37 º C
The volume of liquids is measured in