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WorksheetsGroup Review 12/10
Total questions: 56
Worksheet time: 28mins
A testable statement about the natural world that can be used to build more complex inferences and explanations.
Fact
Theory
Law
Hypothesis
What does science use to support explanations?
Opinions
Data
Beliefs
Traditions
What should you do if you want your friends to believe a statement you make?
Ask a question you can test.
Gather evidence to support it.
Make a prediction.
Collect information about your friends.
Which statement best explains why chemistry and biology are closely connected branches of science?
Chemistry studies nonliving matter while biology ignores chemical processes.
Chemical reactions drive the processes that occur inside living organisms.
Biology uses only microscopes while chemistry uses only test tubes.
Chemistry focuses on stars and planets, which are unrelated to life on Earth.
A research team develops a new high-resolution imaging technology that reduces data-collection time by 80% but costs significantly more per use. Which decision best balances scientific benefit and practical constraints for a public research lab with limited funding?
Use the new technology for all experiments because faster data is always better.
Continue using only older methods to avoid any added cost.
Use the new technology selectively for experiments where higher resolution or speed is essential, and use older methods for routine work.
Purchase the technology and rent it out to other labs to recoup costs, even if it delays experiments.
A method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
Variable
Observation
Scientific Method
Experiment
The summary at the end of an experiment that explains the results is...
conclusion
procedures
materials
responding variable
Stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted. In this scenario, which step of the scientific method is described?
recognize a problem
test the hypothesis with an experiment
form a hypothesis
draw conclusions
In an experiment testing fertilizer effects, the researcher gives every plant the same amount of water and light. These unchanged factors are called:
Variables
Controls
Constants
Dependent variables
A student splashes a corrosive solution on their forearm but reports little pain. Which is the most appropriate immediate response?
Wait to see if symptoms appear later.
Rinse the area with running water for at least 15 minutes and report the incident.
Apply a neutralizing chemical from the shelf without checking instructions.
Cover the area with a bandage and continue the lab.
Which of these is an SI base unit?
Newton
Meter
Liter
Watt
Which of the following is scientific notation for 0.00072?
7.2×10−3
72×10−5
7.2×10−4
0.72×10−3
Convert 5.6×103 grams to kilograms.
0.0056 kg
5.6 kg
5600 kg
0.56 kg
Use a conversion factor to change 0.045 kilometers to meters.
4.5 m
45 m
450 m
0.0045 m
The dependent variable is the data resulting FROM the change made by the experimenter and is placed on the _____ axis.
z
y
x
not on a graph
The sum of all movements from start to the end of motion is best described as ____.
Distance
Displacement
Motion
Velocity
Vector quantities need both a magnitude and a ____.
Distance
Displacement
Direction
Velocity
Jermaine runs exactly 2 laps around a 400 meter track. What is the displacement?
800 m
400 m
0
200 m
When you look at the speedometer of your car, it tells you your ____.
Average speed
Instantaneous speed
Constant speed
Motion speed
What is the formula for speed?
S=D/T
S=T/D
S=D×T
S=T×D
While going to school, a student walks an average of 5 km/hr west for 12 blocks. What is 5 km/hr west?
Speed
Acceleration
Velocity
Gravity
Find the velocity of a plane that traveled 3000 miles west in 5 hours.
65 mph west
6 mph west
600 mph west
6000 mph west
What is the unit of acceleration?
m/s2
Newton
m/s
S
A negative acceleration means that your object is
constant
speeding up
at rest
slowing down
The speed boat's speed increased from 0 m/s to 24 m/s in a time span of 12 seconds. What was its rate of acceleration?
4 m/s^2
2 m/s^2
8 m/s^2
6 m/s^2
A car at rest increases its velocity to 15 m/s in 10 seconds. Calculate its acceleration rate.
1.5 m/s^2
2.3 m/s^2
15 m/s^2
150 m/s2
A car accelerates uniformly from rest to 27 m/s in 6 s while another car accelerates from 5 m/s to 29 m/s in the same time. Which statement is correct about their accelerations and which car travels farther in those 6 seconds?
Both cars have the same acceleration; the second car travels farther.
The first car has greater acceleration; the first car travels farther.
The second car has greater acceleration; the second car travels farther.
Both cars have the same acceleration; they travel the same distance.
What type of friction resists the initiation of motion?
Dynamic friction
Rolling friction
Static friction
Kinetic friction
What is a balanced force?
Forces that cause motion
Forces that cancel each other out
Forces that act in the same direction
Forces that increase speed
What does the term "net force" mean?
The total force acting on an object
The force that cancels out friction
The force of gravity only
The force that keeps an object at rest
Which type of friction is involved when using the traditional corn stone grinder (Tse' bee 'ak'ai)?
Rolling friction
Fluid friction
Static friction
Sliding friction
If two forces of 5 N -> and 3 N <- act on an object in the same direction, what is the net force?
2 N ->
3 N <-
8 N ->
15 N ->
Why does a box not move when you push it lightly but moves when you push harder?
Because of rolling friction
Because static friction is overcome by a stronger force
Because gravity changes
Because fluid friction increases
What happens if the Hogan door has no friction?
It opens and closes easily but may not stop
It cannot open at all
It becomes heavier
It only closes slowly
How does fluid friction affect a swimmer?
Helps the swimmer move faster
Slows the swimmer down
Has no effect
Pushes the swimmer forward
Newton’s first law is also called the Law of ...
Friction
Inertia
Unbalanced forces
Newtons
According to ________, the acceleration of an object is equal to the net force acting on the object divided by the object's mass.
Newton’s Second Law
Newton’s Third Law
Newton’s First Law
Law of Gravity
Which type of force(s) will cause a change in an object's motion?
gravity
zero net force
balanced forces
unbalanced forces
The total momentum before a collision is ________ the total momentum after a collision.
equal to
less than
more than
It depends on the type of collision
How much force is needed to accelerate a 3 kg skateboard at 5 m/s2 ?
8 N
1.6 N
0.6 N
15 N
A force of 90 N is applied to each cart shown. Which cart will accelerate the fastest?
the cart with less mass
the cart with more mass
both carts accelerate the same
acceleration depends only on the force direction
Fluids can also include __ and __.
solids and liquids
solids and gases
liquids and gases
liquids
The amount of force pushing on an area is the definition of....
Fluid
Viscosity
Barometer
Pressure
When you increase your depth under water, the water pressure on your body
increases
decreases
stays the same
optimal
According to Bernoulli’s principle, when the wind speed is high, wind pressure is what?
high
low
not enough information
None of the above
Bernoulli’s principle creates what in airplanes?
Drag
Lift
Weight
Friction
What is Bernoulli’s principle?
Bernoulli’s principle states that as the speed of a fluid decreases, its pressure increases.
Bernoulli’s principle states that as the speed of a fluid decreases, its pressure remains constant.
Bernoulli’s principle states that as the speed of a fluid increases, its pressure decreases.
Bernoulli’s principle states that as the speed of a fluid increases, its pressure increases.
How does Pascal’s principle relate to hydraulic systems?
Pascal’s principle has no relation to hydraulic systems.
Pascal’s principle states that pressure is transmitted equally in all directions in a fluid, which is used in hydraulic systems to transmit force.
Pascal’s principle states that pressure is not transmitted equally in all directions in a fluid.
Hydraulic systems do not use Pascal’s principle to transmit force.
During a hurricane, the air outside a home moves much faster than the air inside the home. Which of the following is possible to happen?
The windows can burst inward.
The windows can burst outward.
The windows cannot burst because the pressure inside and outside the home are equal.
The windows cannot burst because the force inside and outside the home are equal.
Air rushes through a tube connected to a straw. The bottom of the straw is placed in water. Which of the following results from this scenario?
The fast-moving air reduces pressure at the straw opening, causing water to rise up the straw and spray.
The water level remains unchanged because air speed does not affect pressure at the straw.
The air pushes directly on the water surface, forcing bubbles but not lifting water.
The straw collapses due to suction, preventing any water movement.
The pipe carries water horizontally. At one section the pipe narrows, causing the flow speed to increase. According to Bernoulli’s principle (neglecting viscosity), which outcome is most accurate and why?
Pressure increases in the narrow section because more water is present per second.
Pressure decreases in the narrow section because increased speed corresponds to lower pressure.
Pressure stays the same because total energy cannot change.
Pressure oscillates due to changing flow velocity.
The same force is exerted by each of the following. Which exerts the most pressure?
a foot
a large book
a fingertip
the tip of a ball-point pen
A substance that assumes the shape of its container is called a(n) ______.
liquid
fluid
gas
plasma
List four examples of fluids.
Water Air Oil Honey
Rock Sand Metal Wood
Ice Stone Iron Glass
Plastic Rubber Paper Cloth
Instead of referring to their depth in the atmosphere, people refer to their _______ above sea level.
altitude
longitude
latitude
depth
What keeps a person from being crushed by air pressure?
The strength of the human body
The balance of internal and external pressure
Gravity
The Earth's magnetic field
