Physical & Chemical Changes
Types of Scientists
Variables
Types of Experiments
Element, Mixtures, Compounds
Scientific Method
Scientific Tools/ Lab Safety
100
Breaking a glass
Physical Change
100
A Scientist who studies animals.
Zoologists
100
What does control variable mean?
change one thing at a time
100
Ways scientists perform investigations
Scientific Method
100
A pure substance that CANNOT be broken down chemically
Compound
100
How many steps are in the Scientific Method?
7
100
What is this? and what is it used for?
Dropper
It is used to move liquid from one container to another
200
These are all examples of what type of change?
Physical
200
A scientist who studies living things.
Biologists
200
Responds to the changing variable in an experiment
Dependent Variable
200
You use this type of experiment when you are wanting to describe what you see
Descriptive
200
What is represented by a capital letter? and/or capital and lowercase letter?
Chemical Symbol
200
This is a possible answer to a scientific question
Hypothesis
200
What do we hold test tubes in?
Test tube rack
300
True or False. Turning peanuts to peanut butter is an chemical change.
False. To make peanut butter, you grind up roasted peanuts, so nothing new is being created.
300
A scientist who studies weather.
Meteorologists
300
This is the changing variable in an experiment
Independent Variable
300
Taking a pot of cold water and a pot of hot water to see which one boils faster is what type of experiment?
Comparative Experiment
300
What is a compound?
A pure substance made by chemically combining two or more elements
300
What does conducting an experiment need to produce?
Enough data that can answer your question
300
Name 5 things you need to do/ have before you start a lab?
1. Safety goggles
2. Closed-toe shoes
3. Hair is pulled back
4. Lab coat/apron
5. Protective gloves
400
Explain how water could be an example of a physical change.
Physical changes states of matter.
Solid-liquid-gas
400
A scientist who studies rocks, minerals, and Earth's landforms
Geologists
400
This is a scientific procedure used to make a discovery
Experiment
400
What is a comparative investigation?
Collecting data on different organisms/ objects/ features/ to make a comparison
400
What is this called?
Chemical Formula
400
The ____ variable changes in response to the ____ variable in an experiment.
dependent and independent
400
A student is working hard on a chemistry lab experiment that uses a strong acid. Halfway through the lab, the student gets hungry and starts eating a bag of chips. When the student licks their fingers, they start to have a severe reaction.
How do you prevent this situation? How should you respond?
To prevent: do not eat in the lab, wash hands
To respond: tell the teacher
500
If there is a color change, odor change, or temperature change
Chemical Change
500
What type of scientist is this?
Archeologist: a person who studies human history and prehistory through the excavation of sites and the analysis of artifacts and other physical remains.
500
An element, feature, or factor in an experiment.
Variable
500
What is experimental investigation?
Researcher designs an experiment to test a hypothesis
500
What is a pure substance? Give an example
A substance that is not mixed with any other substance
Examples: Gold metal, sugar, salt, diamond
500
If your data doesn't support your ____, go back and do what?
hypothesis. go back, revisit your hypothesis and do the experiment over
500
This makes small things look bigger
Microscope
600
What is a chemical change?
formation of a new substance with different properties
600
Why is it important to know about different types of scientists?
Different backgrounds helps us understand the world better
600
True or False: There can be more than one independent variable in an experiment
600
Without looking at your notes, describe the 3 different types of experiments
Descriptive: describe what you see
Comparative: Comparing data
Experimental: Testing a hypothesis
600
How many classes is the periodic table of elements divided into?
3. They are defined by an element's physical properties.
600
Name all 7 steps of the scientific method in order without looking at your notes.
600
Give me 3 science safety rules
1. Listen to instructions
2. Use all tools responsibly
3. Wear appropriate clothing
4. Wash your hands
5. Clean up your work space
6. Do not taste anything
7. Waft chemicals, don't sniff
8. Never eat or drink while doing an experiment