Progress Test Flashcards
How do scientific investigations begin?
Curiosity or a problem
What are the steps of the scientific method? 6
Purpose, research, hypothesis, experiment, analysis, and conclusion
What do you have to do if your experiment proves your hypothesis wrong?
State a new hypothesis and do a new experiment
Describe the step of purpose
State a problem
Describe research
Find out about the topic
Describe hypothesis
Predict the outcome to the problem
Describe experiment
Develop a procedure to rest your hypothesis
Describe analysis
Record results of the experiment
Conclusion
Compare the hypothesis to the experiments conclusion
What do you use to make observations?
The 5 senses
What is an inference?
Making an educated guess based on what you currently see
Describe the molecules of water in the solid phase?- ice
They are arranged in a random pattern
In which state of matter are the molecules farthest apart from each other?
Gas
In which phase are particles generally the closest?
Solid
In which state are the molecules moving around the fastest?
Gas
Which line is the independent variable on a graph?
The bottom line
Which line is the dependent variable on a graph?
The line on the side of the graph
As the independent variable increases the dependent variable…
Increases
How is a neutron charged?
A neutron has a neutral charge
What charge does a election have?
An electron has a negative charge
What charge does a proton have?
A proton has a positive charge
Where are neutrons found?
Found in the nucleus of an atom
Where are electrons found?
Found in the space outside the nucleus of an atom
Where are protons found?
Found in the nucleus of an atom
How do you use an overflow container?
Subtract your new volume from the starting volume
How do you calculate density?
Volume
How do you calculate volume?
Density
How do you calculate mass?
Density x volume
How do you know if a physical change has taken place?
The substance still has the same properties
What is an ex of a physical change?
A piece of paper being cut
How do you know if a chemical change has taken place?
The substance has changed into something new
What is an ex of a chemical change?
Burning a piece of paper
Where is the atomic mass located?
The number under the symbol
Where is the atomic number located?
The number above the symbol
What is the atomic mass?
The number of protons and neutrons
What is the atomic number?
The number of protons
How can you tell whether it is a base or an acid based on pH value?
Anything more than seven is a base and anything less than seven is an acid. 7 is a neutral.
What are some characteristics of an acid?
- H+
- sour taste
- reactivity with metals
- ability to produce color changes in indicators
What are some characteristics of bases?
- OH-
- bitter taste
- slippery feel
- ability to produce color changes in indicators
