Unit 1 Nature of science
Accuracy is...
Precision is...
Accuracy: How close something is to the target
Precision: Repeatability of hitting the same spot over and over again.
What isn't matter?
ENERGY!
When is an atom neutral
When the # of protons= the # of electrons.
What are some examples of Kinetic energy
Electrical, radiant (motion waves),sound, thermal(heat), Mechanical
Life cycle of a plant
seed-->Germination-->Stems and leaves-->Growth-->Flowers-->Pollination-->fruit/seeds.
What's the difference between an open and closed questions
Open: something that need to be explained through an experiment (scientific)
Closed: One-word answer (unscientific)
What is the difference between molecules and compounds?
Molecules: Two or more atoms bonded together
Compound: Two or more different atoms bonded together.
When is the nucleus stable
When there are enough neutrons to separate the protons.
Examples of Potential energy
Elastic energy, Nuclear, Gravitational, Chemical
Release's water vapor into the from the leaves.
A scientific model should include...
Keys/labels
Title
arrows
Explanation
color-coding/zoom in bubble
Physical vs. Chemical property
Physical: Something you can observe without changing the identity of the matter.
Chemical property: Can be observed after it changes into a different form of matter.
The law of conservation of mass...
States that matter cannot be created or destroyed.
Examples of renewable and nonrenewable resources
Re: Geothermal, Biomass, solar, hydropower, wind.
Non: Natural gas, oil, coal, nuclear.
Heat and pressure is needed in order to form what rock?
Metamorphic
What are the 5 steps in the scietific procces
Ask questions, construct explantions(claim), Planning and carrying out investigation, Analyze(look) the data,CER.
Physical change:
Chemical Change:
Changes appearance but not chemical composition (melting shredding boiling chopping) still the same substance.
Creates new products (combustion, rotting, rusting digestion).
Endothermic and exothermic reactions...
Endothermic reactions: To absorb heat and outside temperatures decrease.
Exothermic reactions: To release heat and increase outside temperature
What the equations for kinetic and potential energy
GPE=mgh
Ke=mv2/2
Why does each level lose 10% of energy
becuase of heat and pressure
What do experiments need?
And what is the role of each
Hint: IV, DV.......
IV: Something that getting changed on purpose
DV: Data effect of the IV
Control Group: part of the experiment that doesnt get changed
Constant: Remains the same for the whole experiment
What properties do all nonmetals have
Brittle
Poor conducters of heat
can be found in different states at room temperature.
Synthesis
decomposition
single replacment
Combustion
To synthesis A + B= AB
To break down AB--->A+B
To replace one anothers atom positions
Burning
As the velocity increases the KE...
As the height of the object increases, the GPE
Increases
Increases
if a beetle eats trees and a bird eats the beetle what is it considered
secondary consumer