Properties of Matter
Is air an element, compound, or mixture?
Mixture
In our paper helicopter experiment, what was the dependent variable?
Time of descent
Identify the type of friction that occurs when an airplane cuts through the air.
Fluid friction
Give the formula for Newton's 2nd Law
F=ma
What is the name of the process where plant sweat is evaporated?
Evapotranspiration
Is H2O (water) an element, compound, or mixture?
Compound
Give an observation + inference pair
Ex.- blue shirt means he likes blue
A car with a mass of 1,000 kg is accelerating at a rate of 5 m/s^(2). What is the force acting on the car? (Show the correct unit in your answer.)
5,000 N
Give an example of an action-reaction pair
Foot pushes ground, ground pushes foot allowing me to walk
Give an example of a chemical change
Burning, etc.
Salt (sodium chloride) is formed when sodium and chlorine chemically combine. Therefore, salt is a(n):
Compound
In an experiment testing how different amounts of water affect plant growth, what is the independent variable?
The amount of water given to each plant
Describe the difference between speed and velocity
Velocity includes direction
Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its:
(Hint: What is the missing variable?)
Mass
Which type of front is known for causing more aggressive weather and being felt immediately?
Cold front
The ability of iron to rust when exposed to oxygen and water is an example of a:
Chemical Property
In an experiment testing how the surface area of a paper helicopter affects its falling time, what would be a controlled variable?
Height of drop, etc.
An object traveling at a constant speed in a straight line is NOT accelerating. List the three ways this object could accelerate?
Speed up, slow down, change direction
Say the entirety of Newton's 1st Law
Object in motion stays in motion/Object at rest stays at rest unless acted on by an unbalanced force
What is the key difference between a mixture and a compound?
Mixture=physically blended
Compound=chemically bonded
A student observes a substance that is shiny and can conduct electricity. These observations describe a:
Physical Property
If you observe that a feather falls to the ground much slower than a rock, even though gravity pulls on both, what is the most significant reason for this difference?
Answer includes surface area
Define inertia
Object's tendency to resist a change in state of its motion.
Balanced forces result in none of this, but unbalanced forces always result in this:
Acceleration
List the all six steps of the scientific method in order
1. Observation/Question
2. Research
3. Hypothesis
4. Testing
5. Conclusion
6. Share