Force, Motion, Light, and Sound Unit Test

A student investigates the pitch of sound with identical water glasses containing different amounts of water.  Different pitches are created by tapping on the rim of each glass.  The vibrations rate of each sound is measured and recorded in a table and the pitch amplitude is measured by how much air is left in the glass.

Given the data on the table, which glass produces the highest pitch?

_{OH 5.PS.2.b2 Identify properties that affect pitch (e.g., a large bell makes a deeper sound than a smaller bell).}

• glass A has the highest pitch

• glass B has the highest pitch

• glass C has the highest pitch

• the pitches are all the same

Answer explanation

Sound vibrates through the liquid and makes sound waves. Wavelengths define the pitch. Wavelengths that are close together are high frequency. They produce high pitches. When wavelengths are further apart, the frequency is lower and are lower pitches.

Tags

.PS.2.b2

Ohio

The flower appears blue in sunlight.  Blue, green, red, yellow, and other colors make up sunlight. 

Which colors should be in the “absorbed” rectangle, and which colors should be in the “reflected” rectangle?

You do NOT need to fill all the blank boxes.

_{5.PS.2.a1 Given an object, explain how it would change the path of light (e.g., a mirror will reflect light, a dark cloth will absorb light, etc.).}

a

b

c

d

green

red

blue

yellow

Answer explanation

When you see a colored object, you're really seeing the color of the light that is being reflected. All other colors are absorbed by that object.

This sunflower is reflecting yellow and is absorbing all of the other colors.

Tags

5.PS.2.a1

light

reflect

color

absorb

A ant crawls up a table leg from point X to the top of the table to point Y.  Then it crawls across the tabletop to point Z.  The graph lines show that each square measures 50 cm in length.  It took the ant 2 minutes to walk from point X all the way to point Z.

_{5.PS.1 The amount of change in movement of an object is based on the mass* of the object and the amount of force exerted. Movement can be measured by speed. The speed of an object is calculated by determining the distance (d) traveled in a period of time}

• 4 cm/min

• 25 cm/min

• 100 cm/min

• 200 cm/min

Answer explanation

Each block that the ant travelled was 50 cm long. Our ant traveled over 4 blocks, so her total distance was 50x4 or 200cm.

Then take the total distance, 200cm and divide it by the total time 2 minutes. That gives us 100cm per minute.

Tags

speed distance force averagespeed

A student designs a method to increase the temperature of water in a glass.

A. Tell which color of cup would absorb the most heat.

B. Tell which position (down, left, right) of the lamp would increase the temperature of the water the most.

• Choose only ONE cup.

• Choose only ONE lamp.

• ​ _{OH 5.PS.2 Light and sound are forms of energy that behave in predictable ways.}

• Blue Cup and Light Facing down

• Black cup and light facing left

• White cup and light facing down

• Black cup and light facing down.

Answer explanation

If light is more intense, it is hotter. Think about the sun being directly overhead. That is when the sun is most hot. The same is true for a light bulb.

Also, as the video shows, dark colors absorb more heat than lighter colors.

Tags

5.PS.2

Light

sound

A student wanted to test how force and mass can affect speed. Which is true?​

_{OH 5.PS.1.c Demonstrate how the speed of an object can be changed by adding mass or exerting a force.}

• The cart with the 1 kg block will go faster than the cart with the 4 kg block.

• The cart that has both the highest fan force and the heaviest mass will go faster than any other.

• The cart that has the highest fan force and the 1 kg mass will go the fastest.

• The car with the highest fan and no weight will go the fastest.

Answer explanation

Friction is greater when there is a bigger mass. That's what prevents a larger object from moving as quickly as one with a smaller mass.

Tags

5.PS.1.c

Ohio

What does this picture show?

_{NGSS PS.FM.3b Apply an unbalanced force to an object to change its motion (e.g., accelerate it, stop it, start it). (background knowledge)}

• a balanced force and 0 new

• an imbalanced force of

  500 Newtons <-----

• an imbalanced force of

  50 Newtons <------

• an imbalanced force of

  50 Newtons ------>

Answer explanation

https://phet.colorado.edu/sims/html/forces-and-motion-basics/latest/forces-and-motion-basics_all.html

Tags

NGSS

PS.FM.3b

Which is an example of an energy transfer?

_{4.PS.2 Energy can be transferred from one location to another or can be transformed from one form to another.}

• water in a bowl

• wind blowing a grain of sand

• a batter ready to hit a baseball

• a drummer ready to hit a drum

Answer explanation

When energy transfers from one object to another, there is a change in motion.

Tags

5.PS.2

Ohio

Which of the following has potential energy?

• a ball in someone's hand

• a ball deflating

• a ball bouncing

• a ball sailing through the air

Answer explanation

https://phet.colorado.edu/en/simulations/energy-skate-park

Tags

5.PS.2.a1

Molly is trying to improve on hitting a softball. Which will most likely help to improve Molly’s hitting?

• a lighter ball and a lighter bat

• a heavier ball and a lighter bat

• a lighter ball and a heavier bat

• a heavier ball and a heavier bat

Tags

OH

5.PS.1.c

Which wave has a greater amplitude?

• Solid Line

• Dotted Line

Answer explanation

Wavelengths and waves occur in both liquid and in sound.

Tags

5.PS.2.c2

Ohio