Science Mid Year Review Questions

A hiker climbs to the top of a mountain at a rate of 0.5 mi/hr. What are the speed and velocity of the hiker?

• speed: 0.5 mi/hr, velocity: 0.5 mi/hr

• speed: 0.5 mi/hr up velocity: 0.5 mi/hr up

• speed: 0.5 mi/hr up, velocity: 0.5 mi/hr

• speed: 0.5 mi/hr, velocity: 0.5 mi/hr up

A researcher places a ringing bell and a lit flashlight inside a glass chamber and removes all of the air using a vacuum. The researcher observes that as the air is removed, the sound of the bell gradually diminishes and then completely stops, but the light from the flashlight does not change.

What is best explained from this investigation?

• Light waves do not need mediums to transfer energy, and sound waves need mediums

• Light waves can pass through glass, and sound waves cannot.

• Light waves can travel through air, and sound waves cannot.

• Light waves need mediums to transfer energy, and sound waves do not.

A space agency performs experiments on four different types of rockets in outer space. All four rockets move through the vacuum at the same rates.

Which rocket will require the greatest amount of force to change its direction?

• a rocket with a mass of 2 kilograms

• a rocket with a mass of 4 kilograms

• a rocket with a mass of 6 kilograms

• a rocket with a mass of 8 kilograms.

Tags

NGSS.MS-PS2-2

Radio signals that are detected by wireless computer networks are not detected by radios and televisions. How is this possible?

• The waves are easily reflected at atmospheric layers

• The waves carry very little information

• The waves have lower frequencies than radios and televisions are designed to detect.

• The waves have higher frequencies than radios and televisions are designed to detect.

Tags

NGSS.MS-PS4-2

What is the main cause of the occurrence of ocean tides on Earth?

• The Moon's gravitational attraction

• the gravity of the largest planet, Jupiter

• The rotation of Earth on its axis

• the elliptical orbit of the Earth

Tags

NGSS.MS-PS2-4

What part of the eye do light waves pass through first?

• convex lens

• cornea

• optic nerve

• retina

A car and a truck are traveling down a highway at the same speeds before coming to a complete stop in 5 seconds. Why does the truck require a greater amount of braking force than the car in order to come to a complete stop in the same amount of time?

• The truck is more likely to tip over than the car.

• The truck is higher off the ground than the car

• The truck has more wheels than the car

• The truck has a greater mass than the car.

Tags

NGSS.MS-PS2-2

Which statement regarding inertia is correct?

• An object's inertia decreases as mass decreases.

• An object's inertia decreases as mass increases.

• There is no relationship between an object's inertia and mass.

• There is only a relationship between an object's inertia and mass when the object is moving.

A magazine reports that a robot sent to Mars drilled onto the surface to collect rock samples. What kind of technological instrument is the robot?

• satellite

• space observatory

• space probe

• spectroscope

A student reads that auroras are formed when charged particles from the Sun collide with particles in the atmosphere. Which solar event is monitored to predict the formation of auroras?

• photosphere

• solar eclipse

• solar flare

• sunspot