Intro to Physical Science
Physical Science is the study of _________ and ________.
What is Chemistry and Physics
_________ is the application of scientific knowledge to real-world problems.
What is technology.
How many electrons are needed to fill the lowest energy level?
What is 2 electrons.
Which type of covalent bond has a slightly positive and slightly negative end?
What is a polar covalent bond.
_________ are the starting material for a chemical reaction.
What are reactants.
A safe way to smell your experiment is to _______.
What is wafting.
Freezing is an example of what kind of change?
What is PHYSICAL
Columns on the periodic table are called _____.
What are groups.
MgCl2 is an example of what type of compound?
What is an ionic compound.
Name one thing that can increase the reaction rate.
Temperature
Concentration
Catalyst
Surface area
The scientific method includes: Observation, Question, Hypothesis, __________, Analyze, and Conclude. What is the missing step?
What is Experiment.
Milk is an example of what kind of mixture?
What is HOMOGENOUS.
Periods of the periodic table refer to the _______.
What are rows.
Which type of bond creates molecules?
What are covalent bonds.
Give an example of evidence that a chemical reaction has occurred.
change in color
change in temperature
Production of gas bubbles
What type of graph shows change over time?
What is a line graph.
Air, Light, Sound, Energy - which has matter?
What is air.
The nucleus of an atom is made up of ______ and ______.
What are protons and neutrons.
Which type of compounds have freely moving electrons?
What are metallic compounds.
Exothermic reactions take _______ energy to break bonds in the reactants than is released when new bonds form in the products.
What is less energy.
A person playing darts and repeatedly hits the same spot on the dart board, but that spot is not the bullseye. This is an example of what?
What is Precision.
True or False: Laws of Nature are a common constraint on technological design.
FALSE
Which two groups of elements very commonly form bonds?
What are halogens and alkali metals.
A(n) _________ is a mixture of a metal with one or more other elements.
What is an alloy.
What type of reaction is this:
CH4 + 2O2 -> CO2 + 2H2O
What is a combustion reaction