Matter Midterm Chapter 1/2 Flashcards
How do observing and inferring differ
Observing is using one or more senses to gather information, while inferring is explaining your observations.
What does predicting mean?
Making a forecast of what will happen in the future based on past experience or evidence.
What is physical science?
The study of matter, energy, and the changes they undergo.
What are the two main areas of physical science?
Chemistry and Physics
Is the statement “It must be raining” an observation or inference? Be able to explain why.
Inference because you are using information you already know to determine this.
How would a knowledge of physical science be useful to a musician? To a photographer?
Musician: A knowledge of sound, including how it is produced.
Photographer: how light moves and interacts with objects.
What is scientific inquiry?
Different ways scientists study the natural world.
Name the six processes that are often involved in scientific inquiry.
Pose question, form hypothesis, design an experiment, collect and interpret data, draw conclusions, communicate.
What is scientific theory? How is that different than scientific law?
Unlike scientific theory, Scientific law describes an observed pattern in nature without attempting to explain it.
How can an experiment that disproves a hypothesis be useful?
scientific knowledge advances when a hypothesis is proven or disproven.
List two things you should do AHEAD of time to prepare for a lab.
read the directions, gather safety equipment, gather supplies
Suppose during a lab activity you get a cut and start to bleed. What is the FIRST thing you should do?
Tell the teacher
What are critical lab safety procedures that should be followed throughout a lab that involves chemicals and the use of bunsen burners.
wear goggles, hair needs to be pulled back, space needs to be cleared.
What is the difference between chemical and physical properties?
Physical properties can be observed without changing pure substances into other substances. Chemical properties can be observed only by changing pure substances into other substances.
How does heterogeneous and homogeneous mixtures differ?
You can see the different parts of a heterogeneous mixture, but not a homogenous mixture.
Suppose you stir a little baking soda into water until the water looks clear again. How could you prove to someone that the clear material is a solution, not a compound?
you could put some of the liquid in an open container. When the water in the solution evaporates, solid baking soda would remain.
What are key relationships we have discovered about particles?
solids- particles are close together
liquids- particles have more movement
gas- particles freely move
