End of Trimester 2 Review

A baseball bat hits a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?

•   100 Newtons, same direction

•   100 Newtons, opposite direction

•   200 Newtons, opposite direction

•   200 Newtons, same direction

Tags

NGSS.MS-PS2-1

According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backwards because -

•     the pull of gravity on the person is the same as on the skateboard, regardless of size.  

•   the mass of the skateboard is the same as the mass of the person jumping off.

• for the force that sent the person forward, there is an equal force pushing back on the skateboard.

•   the air resistance on the person is great and the friction on the skateboard is small.

Tags

NGSS.MS-PS2-1

The nozzle of a rocket is pointed downward so that as fuel is ignited, the exhaust pushes downward. Why is this arrangement necessary for a rocket to function properly?

•   As fuel is combusted, the rocket pushes the gases backward and the gases push the rocket forward.

•   The rocket is protected from the heat of the exhaust.

•   Burned fuel can be collected on the ground.

•   This allows the rocket to be steered properly.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Newton's third law describes action and reaction forces. A table of four scenarios is provided. Which of the scenarios described in the table show equal and opposite reaction forces?

•   The train and girl

•   The rocket and balloon

•   The balloon and girl

•   The rocket and train

Tags

NGSS.MS-PS2-1

The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?

•   The force of the person using the hammer

•   The force of the air resistance on the moving hammer

•   The force of gravity pulling down on the hammer

•   The force of the nail pushing in the opposite direction

Tags

NGSS.MS-PS2-2

The data table provides information on the distance and period of orbit for the inner planets. Based on the pattern in the data, we can predict that the period of Mars’ orbit will be–

•   between 88 and 224.6 days.

•   less than 88 days.

•   greater than 365.2 days.

•   exactly two times 224.6 days.

Tags

NGSS.MS-ESS1-2

NGSS.MS-ESS1-3

Gravity is responsible for which of the following characteristics of a galaxy?

•   The motion of the objects within it

•   The size of its largest stars

•   Its location within the universe

•   The color of light it emits

Tags

NGSS.MS-ESS1-2

Which of the following best describes the formation of the solar system?

•   The sun ejected rocky material which later went on to form the planets.

•   One very large planetary body broke apart into several smaller planets.

•   Several stars of different masses cooled and formed the planets and the sun.

•   A rotating disk of gas and dust was drawn together by the force of gravity.

Tags

NGSS.MS-ESS1-2

Earth and its solar system are a part of which of the following galaxies?

•   Andromeda

•   Black Eye

•   Milky Way

•   Cartwheel

Tags

NGSS.MS-ESS1-2

Students are making a model of planetary motion. The students tie a tennis ball to a string. The string passes through a spool and is attached to a 1 kilogram mass. The mass pulls down on the string as the students spin the tennis ball around the spool. If the students wish to change the model to show what would happen if the sun had a greater gravitational pull, what change should they make?

•   Replace the 1 kg mass with a 2 kg mass

•   Spin the tennis ball at an increased speed

•   Tie the tennis ball with a longer string

•   Change the spool to a longer one

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-2

NGSS.MS-PS2-4