6th grade science part 4

Ben walks 500 meters from his house to the corner store. He then walks back toward his house but stops to talk to a neighbor when he is 200 meters from the corner store. If it takes Ben 910 seconds from the time he leaves his house until he stops to talk to his neighbor, what is his average velocity? (Round your answer to the nearest tenth of a meter per second.) Ben's average velocity is ___ m/s.

0.3

Mikael runs with a speed of 3 m/s for 45 seconds. How far does Mikael run? 15 m 30 m 90 m 135 m

135 m

A helicopter's speed increases from 30 m/s to 40 m/s in 5 seconds. What is the acceleration of this helicopter? _ m/s2

2

Assume each tick mark represents 1 cm. Calculate the total displacement from 0 if an object moves 3 cm to the left, then 7 cm to the right, and then 6 cm to the left. The object moves __ cm to the left. What is the total distance the object travels? cm

2 16

Calculate the final displacement from 0 if an object first moves 3 cm to the left and then 5 cm to the right. The final displacement is __ cm to the _____.

2 right

Shelley gives her little sister a 5-meter head start in a bike race. The race ends 15 meters east from where Shelley started. If her little sister completes the race in 5 seconds, what is her sister's average velocity? (Round your answer to the nearest whole number.) 1 m/s east 2 m/s east 3 m/s east 4 m/s east

2 m/s east

Use the table to answer the questions. What is the fastest time trial for the first quarter checkpoint? ____ seconds What is the slowest time trial for the first quarter checkpoint? ____ seconds What is the range of times measured for this checkpoint? ____ seconds

2.02 2.15 0.13

A downhill skier was able to move 560 meters in 25 seconds. What is the skier's average speed? (Round your answer to the nearest tenth of a meter per second.) The skier's average speed is ______ m/s.

22.4

Zamir and Talia raced through a maze. Zamir walked 2 m north, 2 m east, 4 m south, 2 m east, 4 m north, 2 m east, 3 m south, 4 m east, and 4 m north. Talia walked 2 m north, 6 m east, 3 m south, 4 m east, and 4 m north. Compare their distances: Zamir walked ___ meters and Talia walked __ meters.

27 19

Use the graph to determine the instantaneous speed at 2 seconds. m/s What is the average speed over the entire trip? m/s

3 2

The starting position of this object is _ m. The object is traveling at a velocity of _ m/s.

3 3

You are leaving for a party at your cousin's house in a city that is 150 km away. You will travel at an average rate of 50 km/hr. How long will it take you to arrive? _ hours If you need to be at the party in 2.5 hours, how fast would you need to drive to get there? __ km/hr

3 60

A car traveling at a speed of 24 m/s comes to a stop at a red light. How much time will it take for the car to stop if its acceleration is -8.0 m/s2? 3 s 16 s 32 s 192 s

3 s

Use the data table on the left to complete the calculations. What is the elapsed time for Trial B? ___ s What is the average speed for Trial B? ___m/s

3.0 1.3

The hairs on Xander's arms just started lying flat against his skin. Which is most likely his internal body temperature? 35°C, or 95°F 36°C, or 96.8°F 37°C, or 98.6°F 38°C, or 100.4°F

38°C, or 100.4°F

Calculate the slope of the line on the graph using the formula: m = m = v subscript 2 - v subscript 1 over x subscript 2 minus x subscript 1. The slope of the line is _ m/s.

4

A cyclist going downhill is accelerating at 1.2 m/s2. If the final velocity of the cyclist is 16 m/s after 10 seconds, what is the cyclist's initial velocity? 4 m/s 12 m/s 18 m/s 20 m/s

4 m/s

What is the initial velocity of the object represented by the graph? _ m/s

5

Until a train is a safe distance from the station it must travel at 5 m/s. Once the train is on open track it can speed up to 45 m/s. If it takes a train 8 seconds to reach 45 m/s, what is the acceleration of the train? (Round your answer to the nearest whole number.) 4 m/s2 5 m/s2 6 m/s2 7 m/s2

5 m/s2

Using the black numbers on the stopwatch to answer the questions. What is the most accurate reading of seconds as indicated by the long second hand? ___ _. Look at the divisions between 2 and 4. What level of precision does this stopwatch have based on the divisions marked on its face?

5.3 s tenths of seconds.

Read the elapsed time on the stopwatch and answer the questions. In which digit is there the least amount of confidence? How many significant figures does this measurement have?

7 4

An Olympic runner completes the 200-meter sprint in 23 seconds. What is the runner's average speed? (Round your answer to the nearest tenth of a meter per second.) 0.9 m/s 1.2 m/s 8.7 m/s 10.1 m/s

8.7 m/s

Study the image of the roller coaster, then answer the questions. Note that the arrows indicate the direction of the movement of the roller coaster train. Which section (A or B) of the roller coaster shows positive acceleration? _ Which section (A or B) of the roller coaster shows negative acceleration? _

A B

Use the graph to complete the sentences about two runners. Runner _ is faster than Runner _. Runner _ has a head start.

A B B

Use the graph of speed versus time to answer the questions about acceleration. Which of the cars is speeding up? Which of the cars is slowing down? Which of the cars is maintaining a constant speed?

A C B

Which runner had the fastest speed in the race? Which runner had the slowest speed in the race? Which runner had a head start?

A C C

The graph shows the motion of a car. Which segments show that the car is accelerating? Select three options. A B C D E

A C E

Use the graph to determine acceleration and velocity. Which segments show acceleration? What is the velocity of segment B?

A and C 40 m/s

Which graph shows acceleration? A graph of position (meters) versus time (seconds) has a straight line running from 0 seconds 0 meters upward. A graph of position (meters) versus time (seconds) has a concave line running from 0 seconds 0 meters upward. A graph of position (meters) versus time (seconds) has a straight line running from 0 seconds positive number of meters downward to some later time 0 meters.

A graph of position (meters) versus time (seconds) has a concave line running from 0 seconds 0 meters upward.

Which best explains how the body maintains homeostasis? All systems work together to stabilize the body. Each system works independently to stabilize the body. All systems work together to match the external environment. Each system works independently to match the external environment.

All systems work together to stabilize the body.

Which statements are part of the safety protocol for this lab experiment? Check all that apply. Always wear safety goggles when performing an experiment. Use caution when constructing the track. Pad cars with foam prior to each trial. Ensure that the track is clear before releasing cars. Bolt the ramp to both the floor and desk for support. Report all accidents to the teacher.

Always wear safety goggles when performing an experiment. Use caution when constructing the track. Ensure that the track is clear before releasing cars. Report all accidents to the teacher.

Sunny makes a poster showing the levels of organization in the human body. How can Sunny correct his error? Check all that apply. Arrow A should point to the organ system. Arrow B should point to the cell. Arrow B should point to the organ. Arrow C should point to the muscle tissue. Arrow C should point to the organ system.

Arrow B should point to the organ. Arrow C should point to the organ system.

The graph shows the motion of a car. Which segment shows that the car is slowing down? A B C D

C

Use the drop-down menus to complete each sentence. is moving the fastest. is standing still. started at the same location.

Car A Car C Cars A and B

Determine the cause of acceleration in each scenario. An airplane turning from south to west at constant speed is accelerating due to a change in _________. A biker going 7 m/s west after travelling north at 5 m/s is accelerating due to a change in _____ ___ _________. A runaway shopping cart speeding up as it goes down a hill is accelerating due to a change in _____.

direction speed and direction speed

Zamir and Talia raced through a maze. Zamir walked 2 m north, 2 m east, 4 m south, 2 m east, 4 m north, 2 m east, 3 m south, 4 m east and 4 m north. Talia walked 2 m north, 6 m east, 3 m south, 4 m east, and 4 m north. Compare their displacements: Zamir's displacement is _____ __ Talia's displacement.

equal to

Use the graph of distance versus time to complete the sentences. The cars on the higher track travel _______ ____ the cars on the lower track, in the same time. This means that the cars on the higher track have a _______ average speed than those on the lower track. This is demonstrated by the _____ of the higher track line being greater than the slope of the lower track line.

farther than greater slope

Which group contains only organs in a human body? heart, brain, skin skin, blood, neuron neuron, heart, stomach stomach, blood, brain

heart, brain, skin

Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Use the drop-down menus to complete the statements. In this experiment, the ______ __ ___ _____ was intentionally manipulated. This was the independent variable. The dependent variable measured was the _____ __ ___ ___.

height of the track speed of the car

The state of maintaining a stable internal environment regardless of changing external conditions is called ___________.

homeostasis

The variables for this experiment include the height of the track and the speed of the car. Use the drop-down menus to complete the sentences and identify the independent and dependent variables. The independent variable, or the one that is intentionally manipulated, is _______ ______. The dependent variable, or the one the response is measured in, is _____.

initial height. speed.

Fill in the words that complete the statement. Homeostasis is the state of maintaining a stable ________ environment despite changing ________ conditions.

internal external

Which lists three units of an organ system in order from the simplest to the most complex? red blood cell → heart → tissue skeleton → bone → bone cell muscle cell → muscle tissue → stomach lung tissue → lung → circulatory system

muscle cell → muscle tissue → stomach

instantaneous

occurring immediately

The esophagus, stomach, and small intestines all function together to digest food and absorb nutrients. Which level of organization is being described? tissue organism organ organ system

organ system

Which describes a group of organs that work together to perform a common function? tissue organism organ system cell

organ system

Complete the sentences to describe the different levels of organization in organisms. A(n) _____ ______ is a group of organs that work together to perform a common function. A(n) _____ is a group of tissues that work together to perform a common function. A(n) ____ is a basic unit of structure and function of all living things. A(n) ______ is a group of cells that work together to perform a common function.

organ system organ cell tissue

Which lists three living units of the human body in order from the simplest to the most complex level of organization? red blood cell → circulatory system → blood nervous system → nerves → brain red blood cell → heart tissue → circulatory system bone tissue → skeletal system → bone

red blood cell → heart tissue → circulatory system

Which statements describe a situation with a displacement of zero? Check all that apply. traveling south for 30 miles, then turning west and traveling another 30 miles riding on a Ferris wheel whose entrance and exit are the same walking around the block, starting from and ending at the same house riding on an escalator from the bottom floor to the top floor running exactly one lap around a racetrack

riding on a Ferris wheel whose entrance and exit are the same walking around the block, starting from and ending at the same house running exactly one lap around a racetrack

When the body is cold, an interaction of systems allows the body to warm itself. Which of these help the body warm itself when it is cold? Check all that apply. shivering sweating hair on body lying flat goosebumps forming hair on body standing up

shivering goosebumps forming hair on body standing up

speed

the distance traveled per unit of time

acceleration

the rate of change of velocity

acceleration

the rate of change of velocity; velocity per unit of time

slope

the steepness of a line on a graph; abbreviated by m and calculated by m = (y2 - y1)/(x2 - x1)

average

the sum of all items in a data set divided by the total number of items

What is the purpose of a reference point? to provide a standard system of measurement to establish a point from which to measure future distance, or if movement has occurred to determine the speed of an object in miles per hour to provide a standard from which to evaluate variables in an experiment

to establish a point from which to measure future distance, or if movement has occurred

The object represented by this graph is moving away from the origin at a constant velocity. away from the origin at a decreasing velocity. toward the origin at a constant velocity. toward the origin at a decreasing velocity.

toward the origin at a constant velocity.

Identify which variable is plotted on each axis of a position vs time graph. Column A represents the variable to be plotted on the _ -axis. Column B represents the variable to be plotted on the _ -axis. In a position vs time graph, time is always plotted on the _ -axis.

x y x

Use the graph to determine the velocity between 6 and 12 seconds. m/s What was the velocity over the entire trip? m/s

-2 0

An airplane traveling 245 m/s east experienced turbulence, so the pilot decided to slow down to 230 m/s. It took the pilot 7 seconds to get down to this speed. What is the acceleration of the plane? (Round your answer to the nearest integer.) -2 m/s2 2 m/s2 67 m/s2 -67 m/s2

-2 m/s2

The acceleration of segment D is m/s2. Rank segments A, B, and C from least acceleration to greatest acceleration. Least:

-20 C B A

What is the acceleration of the car at segment C? 30 m/s2 -30 m/s2 40 m/s2 -40 m/s2

-30 m/s2

Assume each tick mark represents 1 cm. Calculate the total displacement if a toy car starts at 0, moves 5 cm to the left, then 8 cm to the right, and then 3 cm to the left. The car moves _ cm, so there is no displacement.

0

Which statements best describe the motion of Car A and Car B? Check all that apply. Car A and Car B are both moving toward the origin. Car A and Car B are moving in opposite directions. Car A is moving faster than Car B. Car A and Car B started at the same location. Car A and Car B pass each other at the crossover point on the graph.

Car A and Car B are moving in opposite directions. Car A is moving faster than Car B. Car A and Car B pass each other at the crossover point on the graph.

Based on the time measurements in the table, what can be said about the speed of the car on the lower track as compared to the higher track? How can the reasoning for the above answer be best explained? On the higher track, the elapsed time is _______. Calculate speeds for each track. How much faster was the car on the higher track than the lower track?

Cars travel faster on the higher track. shorter 0.56 m/s

Match the measurement with the proper SI unit. Acceleration: Velocity: Distance:

Meters per second squared Meters per second Meters

Which statement correctly describes the differences between positive and negative acceleration? Positive acceleration describes a change in speed; negative acceleration describes no change in speed. Positive acceleration describes no change in speed; negative acceleration describes a change in speed. Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed. Positive acceleration describes a decrease in speed; negative acceleration describes an increase in speed.

Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.

Some life forms move so slowly that their movement cannot be detected by normal observation. The best way to determine any movement is by placing a mark at some point, and observing any change in position from it. Why is this true? The life form returns to that mark. The mark is a reference point. The mark is a standard unit. The mark makes measuring convenient.

The mark is a reference point.

Which statements describe how the body maintains homeostasis on a hot day? Check all that apply. The nervous system and the muscular system work together. The muscular system and skeletal system work together. Muscles make small, rapid movements to produce heat within the body. Sweat reaches the surface of the skin and evaporates into the air. Muscles underneath the skin contract, causing hair on the skin to stand up. Muscles underneath the skin relax, causing hair on the skin to lay flat.

The nervous system and the muscular system work together. Sweat reaches the surface of the skin and evaporates into the air. Muscles underneath the skin relax, causing hair on the skin to lay flat.

Which statements describe the motion of the object represented by the graph? Select three options. The object is moving away from the origin. The object is moving towards the origin. The object started at the origin. The object started at 2 meters. The object is traveling at a constant velocity.

The object is moving away from the origin. The object started at 2 meters. The object is traveling at a constant velocity.

Based on the graph, describe what is happening between 4 and 6 seconds. The object is moving away from the start at a constant speed. The object is not moving. The object is returning to the start at a constant speed. The object is changing speed.

The object is not moving.

Complete the passage to describe velocity vs time graphs. A velocity vs time graph is a graph that shows the relationship between the velocity of an object over time. ____ is plotted on the x-axis in seconds, and the _______ of the object is plotted on the y-axis in meters per second

Time velocity

How is velocity different from speed? Velocity is based on distance. Velocity includes direction. Velocity can be an average or instantaneous.

Velocity includes direction.

Which scenario involves acceleration? a motorcycle at constant speed on a highway a recreational vehicle parked in a campground a car decreasing its speed due to a red light a teenager talking to friends at an intersection

a car decreasing its speed due to a red light

velocity

a displacement per unit of time; distance traveled per unit of time in a specific direction

velocity

a displacement per unit of time; or distance traveled per unit of time in a specific direction

position vs time graph

a graph that shows the relationship between the position of an object over time; time is plotted on the x-axis, and the position of the object is plotted on the y-axis

velocity vs time graph

a graph that shows the relationship between the velocity of an object over time; time is plotted on the x-axis and the velocity of the object is plotted on the y-axis

negative acceleration

a type of acceleration that describes the slowing down of an object

positive acceleration

a type of acceleration that describes the speeding up of an object

Geneva was walking on the beach on a crisp November morning when a cool wind came her way. How would Geneva's body respond to maintain homeostasis?

by shivering

Jasmine is healthy girl who is playing outside. Her internal body temperature rises to 38°C, which is above normal. How does her body most likely respond to help her return to homeostasis? by shivering by sweating by producing goosebumps by making hair stand up

by sweating

identifying Levels of Organization What level of organization is represented by each image? A: B: C:

cell tissue organ tissue

What is the correct order of levels of organization, from smallest to largest? organism → tissue → organ → organ system → cell organism → organ system → organ → tissue → cell cell → tissue → organ → organ system → organism cell → organ → organ system → organism → tissue

cell → tissue → organ → organ system → organism