3rd Six Weeks Review

3rd Six Weeks Review

Forces, Motion, Electromagnetism, Waves, and the Big Bang

8.PS2.3 describe the position, force, and direction of the object.

8.PS2.4 provide evidence that the change in an object’s motion depends on the sum of the forces on the object and the mass of the object.

8.PS2.5 every force exerted on

an object there is an equal force exerted in the opposite direction.

Multiple Choice

A baseball pitcher throws a baseball. It does not reach the catcher. What should the pitcher do to make a ball reach the catcher?

• Increase the force used when throwing the ball

• Decrease the force used when throwing the ball

• Reduce the gravity exerted on the ball

• Increase the gravity exerted on the ball

Multiple Choice

What is the net force?

• 400 N Up

• 400 N Down

• - 400 N Down

• 800 N Down

Multiple Choice

In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the net force?

• 50N to the left.

• 350N to the left.

• 350N to the right.

• 50N to the right.

Multiple Choice

Katniss Everdeen applies 20 N of force back on her bow. What happens to the arrow when she lets go?

• The arrow goes backwards

• The arrow goes forwards with 20 N

• The arrow goes forwards with 30 N

• The arrow goes forwards with 0 N

Multiple Choice

An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is

• larger.

• the same.

• smaller

• need more information to say.

Multiple Choice

What is the net force

• 10 N

• 0 N

• 25 N

• 1 N

Multiple Choice

It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes

• Newton's first law, the law of inertia

• Newton's second law, the law of acceleration

• Newton's third law, the law of action reaction

• The law of universal gravitation

Multiple Choice

The formula

? = mass x acceleration

or

? = m x a

is used to find

• Force

• Velocity

• Momentum

• Gravity

Multiple Choice

When forces on an object are balanced, what is the force?

• Five

• Ten

• Six

• Zero

8.PS2.1 depict the relationship between magnetism and electricity in electromagnets, generators, and electrical motors, emphasizing the factors that increase or diminish the electric current and the magnetic field strength.

8.PS2.2 provide evidence that fields exist between objects exerting forces on each other even though the objects are not in contact.

Multiple Choice

Based on the arrangement of the electric field lines in the diagram, what are the charges?

• both charges are the same

• the charges are opposite

• they are neutral; no charge

Multiple Choice

The area of magnetic force around a magnet is known as its _____________.

• magnetic field

• magnetic declination

• magnetic fan lines

• magnetic tan lines

Multiple Choice

Electric currents produce _____________

• electron clouds

• magnetic fields

• sound waves

Multiple Choice

How do electromagnets differ from regular magnets?

• A. They can be turned off and on

• B. Their polarity can be reversed

• C. Their strength can be changed

• D. All of the above

Multiple Choice

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.

• Use a smaller battery.

• Reverse the poles of the magnet.

• Remove all the coils and the nail.

Multiple Choice

a motor converts electrical current into

• chemical energy

• chemical force

• mechanical force

• mechanical life

Multiple Choice

Motor or Generator?

• Motor

• Generator

Multiple Choice

What energy do you put IN to a generator?

• Mechanical

• Electrical

• Thermal

• Potential

Multiple Choice

What type of energy comes OUT of a generator?

• Mechanical

• Electrical

• Thermal

• Potential

Multiple Choice

Examine the diagram of a fossil fuel power plant. What component changes kinetic energy to electrical energy?

• boiler

• condenser

• generator

• turbine

8.PS4.1 Use models to represent the basic properties of waves including frequency, amplitude, wavelength and speed.

8.PS4.2 Compare and contrast mechanical waves and electromagnetic waves based on refraction, reflection, transmission and absorption and their behavior various media.

8.PS4.3 Evaluate the role that waves play in different communication systems.

Multiple Choice

All waves carry ________ as they travel from one place to another.

• matter

• space

• energy

• water

Multiple Choice

What is the frequency of this wave?

• 3 Hertz

• 4 Hertz

• 5 Hertz

• 6 Hertz

Multiple Choice

What property of the wave is represented by the letter "B"?

• amplitude

• crest

• trough

• wavelength

Multiple Choice

You can't hear sounds in outer space because there is no

• medium

• light

• energy

• heat

Multiple Choice

What is a wavelength?

• How many waves pass a certain point

• The distance from one wave crest to another

• The entire length of a wave

Multiple Choice

Which wave in the diagram has the greatest frequency?

• 1

• 2

• 3

• 4

Multiple Choice

When light hits something like a raindrop or a prism, it will...

• Be absorbed

• Refract, or bend

• Neither

Multiple Choice

When light passes through a prism, why do you see different colors?

• Each color has a different wavelength, so they all bend at different angles

• Because Stone Cold said so

• Because the prism is magical and allows you see the colors

Multiple Choice

When light hits the shirt in the picture, which color will bounce off?

• Blue

• Indigo

• Orange

• Violet

Multiple Choice

Which of the following colors have the longest wavelength?

• Red

• Yellow

• Blue

• Green

Multiple Choice

What type of information can be sent by radio waves?

• Radio

• Radio and video

• Cell phone and Internet data

• All kinds of data

Multiple Choice

Which of the following answer choices explains what digital means?

• Data expressed as single digits, usually 0 and 1

• Smooth and continuous data

• Electrical

• computerized

Universe Formation

8.ESS1.1 Research, analyze, and

communicate that the universe

began with a period of rapid

expansion using evidence from

the motion of galaxies and

composition of stars.

Multiple Choice

Which statement is true?

• The galaxies are moving toward us.

• The galaxies are moving away from us.

• The universe remains static or unchanged in motion.

• None of the above

Multiple Choice

Cosmic Microwave Background Radiation is a form of _________.

• Matter

• Energy

• Visible Light

• Water

Multiple Choice

Which elements are most

abundant in the visible

universe?

• Hydrogen and Carbon

• Carbon and Helium

• Hydrogen and Oxygen

• Hydrogen and Helium

Multiple Choice

How does the abundance of hydrogen and helium support the Big Bang Theory.

• Hydrogen and helium are elements on the Periodic Table

• Hydrogen and helium are in the same ratio throughout the universe.

• Hydrogen and helium have many current uses today

Multiple Choice

Light emitted from a star or galaxy can be separated into a band of colors, called a ________.

• Red Shift

• Wave Length

• Spectrum

• Microwave

Multiple Choice

How did the discovery of Cosmic Microwave Background Radiation support the Big Bang Theory?

• It suggests that Hydrogen and Helium were the first elements to form.
• It confirms the age of the Earth to be around 5 billion years old.
• It supports the idea that the universe used to be hotter.
• It demonstrates that the universe continues to expand.

Multiple Choice

As galaxies move away from our galaxy

a shift on the electromagnetic spectrum

(EMS) is noticed. This phenomena is

called _____________.

• redshift

• blueshift

• unshift

• blackshift