Physical Science - Test 1 Review Flashcards
What is inferring?
Explaining your observations.
What is predicting?
To estimate something that will occur in the future or be a consequence of something.
What is a quantitative observation?
An observation with numbers.
What is a qualitative observation?
Descriptions that does not include numbers.
What do physical scientists study?
Chemistry and physics.
What does observing involve?
Using all or many senses to gather information on a topic or object.
What are the steps to the scientific inquiry?
Posing questions, developing hypotheses, designing experiments, collecting data, interpreting data, drawing conclusions, communicating results.
What is matter?
Anything that takes up space and has mass.
What is volume?
The amount of space an object or substance takes up.
What is density and what is its formula?
The amount of material in a given space. (Density = Mass/Volume
Can a hypothesis be proven true?
It cannot be proven true. However, it can be supported or unsupported – or become a theory.
What is mass?
How much matter is in an object.
Distinguish physical from chemical properties.
A physical property is something we can observe with our senses, opposed to a chemical properties, which tell us how atoms will combine.
What makes a hypothesis testable?
A hypothesis is testable if you can form a controlled experiment on that hypothesis.
What makes an experiment controlled?
You are only testing for one variable.
In the experiment, air temperature and cricket chirps, what is the independent variable? What is the dependent? What makes the experiment controlled?
The independent variable is the air temperature because it is the manipulated variable. The dependent variable is the amount of cricket chirps because it responds to he manipulated variable. The experiment is controlled because you can compare your final results to those of a control group.
What should you do if an accident occurs in the lab?
Notify the teacher immediately after or during the accident. If you get a chemical in your eyes, use the eye wash. If your clothes catch fire, stop drop and roll and/or use fire blanket or water.
If you cut an apple in half, does the density change?
The density does not change because the mass will be halved and the volume will be halved, leaving the ratio the same as it was originally.
How is volume measured with a graduated cylinder?
You fill the graduated cylinder to the appropriate volume, remember that volume, and then submerge the object and subtract the original volume from the new volume.
How is mass measured with a triple-beam balance?
Put the object being measured on the pan, then, starting with the largest weight, slide them until the pointer becomes level.
How has technology effected scientific research?
EDIT!!
Be able to read a thermometer; tell how a thermometer works; what are the units used to report temperature?
A thermometer works because most materials expand when heated. This causes the substance inside to increase, making the substance rise in the tube. Most thermometers one of three common different types of units; Kelvin, Fahrenheit, and Celsius.
