Science SGO Flashcards
to describe velocity you need to know __________ and ___________
speed direction
acceleration is any change in _____________ and _______________
speed and direction
Inertia resists ______________ in motion
any change
Forces that are equal in size but opposite in direction are ___________ and do not cause a change in motion.
balanced
Newton’s first law of motion states that an object remains at rest unless an ___________ force acts on it.
unbalanced
Whenever a body is in motion, there is always _________ to oppose the motion.
friction
The region of low pressure in a sound wave is called a ____________
rarefraction
Doubling the mass of an object will ________ the force.
double
As the distance between two objects increases, the gravitational force between the objects ______________.
decrease
waves transport ______
energy
when light bounces off a surface, it’s called __________
reflection
To produce sound, an object must be ____________
vibrating
Sound travels fastest in which type of matter?
solid
If you pass a building with a siren sounding, as you move away from the building, the sirens will sound ________ in pitch.
lower
A light wave is which type of energy?
electromagnetic waves
The longest wavelength in the electromagnetic spectrum is the _________
radio wave
The material in which a wave travels is a _________
medium
If an object looks blue, it reflects ________ frequencies of light waves.
blue
If light waves change speed when they pass from one medium into another, the light will be ___________.
refracted
Humans are able to only see ______ Light
visible
Which of the following wavelengths would have the highest frequency?
a. 600m
b. 0.5m ·
c. 450m
d. 330m
B. 0.5m
Four items are left out in the sunshine for two hours. Which item will experience the least increase in temperature and why? Blue sweatshirt, black chair, white hat
White hat
Which form of electromagnetic radiation has the highest amount of energy?
gamma ray
Which of the following is a form of nonmechanical energy?
kinetic
potential
solar
solar
Potential energy is energy that is ________
stored
Name some energy resources that are considered renewable
Wind, solar power
Mechanical energy is the energy associated with ___________ and ______
position and motion
What is the difference between analog and digital?
Digital is more reliable for sending information because it uses a series of 0 and 1, which is not as affected by human error.
Name some physical properties of matter.
mass volume denisty
Which subatomic particle in the atom has a negative charge?
electron
Which is NOT a sign of a chemical reaction?
Melting
Fire
Unexpected Color change
Precipitate
melting
The atomic number of an element tells you the number of ________ in an atom
protons
Two substances are poured into a cup and a reaction occurs. A thermometer is placed in the cup and the temperature in the surrounding area begins to increase. Based on this information, was the reaction endothermic or exothermic?
exothermic
Write B if the equation is balanced and U if it is unbalanced
S8 + O2 —> 8SO2
16Ag + S8 —> 8Ag2S
H2 + N2 —> 2NH3
U
B
U
Heat flows from ________ to _________
hottest to coolest
Why do we use synthetic polymers?
a. Because natural polymers are too expensive
b. Because natural polymers wear out quickly
c. Sometimes natural materials are not available
d. All of the above
D
Give an example of a natural polymer?
cotton, silk
____________ are the beginning substances in a chemical equation
reactants
A reaction in which energy is released is called ______________.
exothermic
Give an example of a chemical symbol that is a compound
H2O
