Semester 1Exam Review

2014-2015

Exam Review• This review will cover most of the questions on

your semester review, but not all of them.

• If you complete 90% of your review packet by Friday, you will get to use an index card on the exam.

• Index cards must be issued by your teacher and have his or her initial, otherwise they will be confiscated.

How do you write a hypothesis?

• In an if, then statement:– If I eat kale every day, then I will grow 6 inches

taller.

How can scientists come up with different conclusions if they are looking at the same experiments and data?

Each scientist was able to fit the data together into a logical conclusion even though the resulting models were not identical.

Ten Safety Rules?

• What are they?

Name 3 International System of Units (SI) units.

Name 3 International System of Units (SI) units.

• Grams• Liters• Meters

Measures?

Mass (amount of matter) of an object in GRAMS

Measures?

Length of an object in METERS, centimeters, or millimeters

Measures?

Volume of an object in LITERS

Measures?

Temperature of a substance in DEGRESS CELCIUS or

CENTIGRADE

How do you calculate density?

Mass divided by volume

How do you measure the volume of an irregular shaped object?

What is the volume of this rock?

The part of an experiment that remains the same that you compare your results to is

Control, controlled variable

In a controlled experiment, how many variables should you test at

one time?

ONE

Sponge Bob Clean Pants tested laundry soaps to see which would

work best to clean his pants.

What was the independent variable?

What is the dependent variable?

Laundry soap

How clear his pant were

Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check

this out by spraying half of the shower with coconut juice. He sprays the other half of

the shower with water.

What is the controlled variable?What is the independent variable?

Side with water

Side with coconut juice

You are sitting in the cafeteria at lunch. You see a boy in a red shirt sitting by himself in the corner of the cafeteria.

quantitative observation?inference?

There is one boy

The boy is not feeling wellThe boy has no friends

As frequency of a wave increases, what happens to the wavelength?

Wavelength will decrease or become shorter

What causes you to hear a drum being played?

vibrations

Which of the following types of waves require a medium?

a. Visible lightb. x-raysc. Microwavesd. Sound waves D

The sun's rays that cause sunburn

ultraviolet

Property of a wave?

Reflection

Property of light shown?

Refraction

Wavelength?

Amplitude?

When the frequency of a sound seems to change as the source moves in relation

to the listener, what is that called?

Doppler Effect

Which of the following objects would sound travel through the fastest?

A. AirB. WaterC. IceD. Space

C

You are at a gas station and see a mirror attached to the ceiling that allows you to see

the whole store. This is an example of a

Convex mirror

Which property of light causes a rainbow to form after a rainstorm?

refraction

A person is listening to a baseball game on their radio. Why do they hear the game

before someone who is at the game?

Electromagnetic waves (light) travels faster than sound

What do dolphins use to locate things?

reflection

What is happening when a person sees a red apple?

The apple is reflecting the color red and absorbing all the other colors of the spectrum

In TRANSVERSE waves, the wave energy moves• parallel to the wave vibrations.• perpendicular to the wave vibrations.• opposite to the wave vibrations.• in the same direction to the wave vibrations.

In LONGITUDINAL waves, the wave energy moves

• parallel to the wave vibrations.• perpendicular to the wave vibrations.• apart from the wave vibrations.• at right angles to the wave vibrations.

What type of waves are sound waves?

longitudinal

How does the speed of sound in water compare to the speed of sound in air?

The speed is faster because the molecules in water are closer to each other.

What do waves transfer?

ENERGY

Which type of electromagnetic wave has the greatest frequency?

• GAMMA RAYS

Which type of electromagnetic wave has the longest wavelength?

• RADIO WAVES

The law of conservation of energy states that when two objects collide, their

combined energy

Remains the same after the collision

The water stored behind a dam is considered which type of energy?

Potential

According to Newton’s first law of motion, a moving object that is not acted upon by a

unbalanced force will

Remain in motion

To keep a heavy box sliding across a carpeted floor at constant speed, a person must continually exert a force on the box. This force is used primarily to

overcome which of the following forces?

The frictional force exerted by the floor on the box

A bat strikes a ball into the outfield. If the action force is the bat hitting the

ball, the reaction force is

the ball hitting the bat.

What will happen if you drop a feather and a pebble from the roof

of a house at the same time?

• The pebble will fall faster because air resistance affects it less.

• When the paper on your desk is not moving, are the forces acting upon it balanced or unbalanced?

• balanced

Two identical cars travel at 45 miles per hour toward the center of the intersection

(point A, as shown above) with equal force. The cars collide at the intersection. If after they collide the cars stick to each

other and move together, they will come to rest closest to

point:

If there are no other forces pushing on the block, in which case is the acceleration of the block greatest?

A board has been nailed in the center by a large nail. It is acted on by two forces in the direction shown by the arrows. Each force has the

same size, equal to 10N. Which picture shows the

forces that would cause the board to turn?

Two dogs are tugging on a rope. The rope is not moving because the dogs

are pulling inopposite directions with equal force.

How do you calculate Net Force?

• Add or subtract depending on the direction of the force

A person throws a ping pong ball 10 m and then throws a basket ball 10 m. Which

throw requires more force and why?

• The basketball because it has more mass.

A girl riding on a skateboard at 3 m/s suddenly hits the curb. The girl will

• fall forward at a speed equal to 3 m/s.