Scientific Method
This is the study of the composition, structure, properties, and reactions of matter.
Chemistry
Give an example of a homogeneous mixture?
milk, soda, air, brass, etc
Which subatomic particles are found in the nucleus?
protons and neutrons
If a car is moving at a speed of 15 m/s, how long will it take to travel 75 m?
75 m / 15 m/s = 5 s
What is the equation for calculating Kinetic Energy of an object?
KE = 1/2 mv2
What do we call a proposed answer to a question?
Hypothesis
Phase change when a solid changes directly to a gas
sublimation
How does an atom become a positive ion?
by losing electrons
A car that's traveling 10 m/s accelerates to 45 m/s within 5 seconds. What is the car's acceleration?
7 m/s2
Name 3 examples of nonrenewable energy resources
oil
coal
natural gas
nuclear fission
Which group in an experiment does NOT receive the thing being tested?
Control group
What are the two types of pure substances?
elements and compounds
If two atoms are isotopes, what will be the same about each atom and what will be different?
Same number of protons, different number of neutrons and different mass numbers.
2 people are pulling on a rope. John pulls to the right with 75 N of force and Adam pulls to the left with 60 N of force. What will be the net force on the rope and what direction will it move?
15 N Right
What region of the world contains most of the world's oil supplies?
Middle East
What are the metric base units for:
- Mass
- Distance
- Volume
Mass = grams
Distance = meters
volume = Liters
What does Kinetic Theory of Matter say?
All particles of matter are in constant motion
When are atoms the most stable and unreactive?
When they have a full outermost shell of electrons
What must happen for an object to reach terminal velocity?
Force of gravity and air resistance must be equal
An object rolls down a ramp. What will be special (regarding kinetic and potential energy) when the object hits the halfway point down the ramp?
the amount of kinetic and potential energy will be equal
Adam is testing the effect water has on the height a plant grows. He gets two plants. He waters one plant once a day and the other twice a day. At the end of the month he measures their height.
What is the manipulated and responding variables in Adam's experiment?
Manipulated = amount plants get watered
Responding = growth of plants
Which 2 groups on the periodic table are the most reactive?
alkali metals
halogens
Sarah travels 6 km North then turns and travels another 8 km East.
What will be her distance and displacement?
Distance = 14 km
Displacement = 10 km NE
Name all 6 forms of energy
electromagnetic energy
Chemical energy
thermal energy
electrical energy
nuclear energy
mechanical energy