Rose Helderman
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Rose Helderman
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Chapter 2 Science Grade 8

Chapter 2 Science Grade 8

Question 1 of 42

1

Scientists measure length, mass, volume, density, temperature and time using SI untis.

Select one of the following:

  • True
  • False

Explanation

Question 2 of 42

1

Length is

Select one of the following:

  • the distance from one point to another

  • the amount of matter in an object

  • measure of the force of gravity acting on an object

  • the amount of space taken up by an object

  • measure of how much mass is contained in a given volume

Explanation

Question 3 of 42

1

The International System of Units (SI) is based off the metric system.

Select one of the following:

  • True
  • False

Explanation

Question 4 of 42

1

The measure of the amount of matter in an object is

Select one of the following:

  • mass

  • volume

  • gravity

  • density

  • weight

Explanation

Question 5 of 42

1

The force of gravity acting on an object is the

Select one of the following:

  • mass

  • volume

  • gravity

  • density

  • weight

Explanation

Question 6 of 42

1

The amount of space taken up by an object or substance is

Select one of the following:

  • mass

  • volume

  • gravity

  • density

  • weight

Explanation

Question 7 of 42

1

SI stands for

Select one of the following:

  • International Scientific Units

  • International System of Units

  • International System of Science

  • International House of Science

Explanation

Question 8 of 42

1

Which of the following is a standard system based on 10

Select one of the following:

  • miles

  • yards

  • metric

  • volume

Explanation

Question 9 of 42

1

The basic SI unit for measuring weight is a measure of force called

Select one of the following:

  • newton

  • pound

  • ton

  • kilogram

Explanation

Question 10 of 42

1

Weight changes when

Select one of the following:

  • gravity changes

  • with different scales

  • the type of measurement system you use

  • it never changes

Explanation

Question 11 of 42

1

The curve of the liquid in which you use to take a measurement

Select one of the following:

  • SI

  • metric system

  • meniscus

  • graduated cylinder

Explanation

Question 12 of 42

1

How would you measure the volume of an irregular shaped object

Select one of the following:

  • with a ruler

  • displacement of water

  • on a scale

  • by carefully studying it

Explanation

Question 13 of 42

1

The basic SI unit for measuring volume is the

Select one of the following:

  • cubic meter

  • newton

  • kilogram

  • yard

Explanation

Question 14 of 42

1

The measure of how much mass is contained in a given volume is

Select one of the following:

  • mass

  • volume

  • gravity

  • density

  • weight

Explanation

Question 15 of 42

1

The official SI unit for temperature is the

Select one of the following:

  • nweton

  • kelvin

  • second

  • kilogram

Explanation

Question 16 of 42

1

When collecting data, scientists use math skills that include all of the following except

Select one of the following:

  • precision



  • significant figures

  • accuracy

  • percent error

  • estimation

Explanation

Question 17 of 42

1

The approximation of a number based on reasonable assumptions

Select one of the following:

  • estimates

  • accuracy

  • precision

  • significant figures

Explanation

Question 18 of 42

1

Estimates are useful when

Select one of the following:

  • it is easy to count each individual or object

  • when a person isn't good at counting

  • when it is impossible to count every individual or object

  • when you don't have enough time to count every individual object

Explanation

Question 19 of 42

1

Measurements are never completely precise.

Select one of the following:

  • True
  • False

Explanation

Question 20 of 42

1

The numerical average of a set of data

Select one of the following:

  • mean

  • mode

  • median

  • range

  • percent error

Explanation

Question 21 of 42

1

The middle number in an ordered set of data

Select one of the following:

  • mean

  • mode

  • median

  • range

  • percent error

Explanation

Question 22 of 42

1

The number that appears most often in a list of numbers

Select one of the following:

  • mean

  • mode

  • median

  • range

  • percent error

Explanation

Question 23 of 42

1

The difference between the greatest value in the set and the least value

Select one of the following:

  • mean

  • mode

  • median

  • range

  • percent error

Explanation

Question 24 of 42

1

Humans or equipment error can produce data that does not fit with the data set. What is this data called?

Select one of the following:

  • reasonable data

  • scientific data

  • anomalous data

  • specific data

Explanation

Question 25 of 42

1

The percent difference between the known value of a substance and its measured value is called

Select one of the following:

  • mode

  • median

  • range

  • weight

  • percent error

Explanation

Question 26 of 42

1

A picture of your data is called

Select one of the following:

  • accuracy

  • estimation

  • graph

  • model

Explanation

Question 27 of 42

1

The following are the ages of people in the room.
36 36 37 37 39 40 41
What is the mode?

Select one of the following:

  • 36

  • 37

  • 39, 40 and 41

  • 36 and 37

Explanation

Question 28 of 42

1

Scientists use graphs to identify trends, make predictions, and recognize anomalous, or inconsistent data.

Select one of the following:

  • True
  • False

Explanation

Question 29 of 42

1

Look at the graph on the page mom has. What type of graph is this?

Select one of the following:

  • linear graph

  • non linear graph

  • pie graph

  • line graph

Explanation

Question 30 of 42

1

3 gerbils weigh 20 grams. How many millograms would the three gerbils weigh?

Select one of the following:

  • 200 mg

  • 2,000 mg

  • 20,000 mg

  • 200,000 mg

Explanation

Question 31 of 42

1

A graph that shows data points in a straight line is called a

Select one of the following:

  • linear graph

  • non linear graph

Explanation

Question 32 of 42

1

A graph in which the points do not fall in a straight line are called

Select one of the following:

  • linear graph

  • non linear graph

Explanation

Question 33 of 42

1

A point that is not part of the trend is an anomalous data point called an outlier.

Select one of the following:

  • True
  • False

Explanation

Question 34 of 42

1

an approximation of a number based on reasonable assumptions

Select one of the following:

  • estimate

  • significant figures

  • precision

  • accuracy

  • percent error

Explanation

Question 35 of 42

1

refers to how close a group of measurements are to each other

Select one of the following:

  • estimate

  • significant figures

  • precision

  • accuracy

  • percent error

Explanation

Question 36 of 42

1

communicate how precise measurements are and includes all digits measured exactly, plus one estimated digit

Select one of the following:

  • estimate

  • significant figures

  • precision

  • accuracy

  • percent error

Explanation

Question 37 of 42

1

refers to how close the measurement is to the true or accepted value

Select one of the following:

  • estimate

  • significant figures

  • precision

  • accuracy

  • percent error

Explanation

Question 38 of 42

1

Data that does not fit with the data set is called

Select one of the following:

  • scientific data

  • reasonable data

  • anomalous data

  • specific data

Explanation

Question 39 of 42

1

Cheryl took 7 math tests in one marking period. What is the range of her test scores?
89, 73, 84, 91, 87, 77, 94

Select one of the following:

  • 91

  • 5

  • 85

  • 21

Explanation

Question 40 of 42

1

Scientists use plans to test their ideas about things they cannot observe directly

Select one of the following:

  • True
  • False

Explanation

Question 41 of 42

1

Scientists build __________ to represent a process. They test whether the input and output from the model match the input and output of the system in the natural world.

Select one of the following:

  • map

  • graph

  • model

  • significant figures

Explanation

Question 42 of 42

1

Anomalous data shows on a graph as a(n)

Select one of the following:

  • nonlinear graph

  • trend

  • outlier

  • linear graph

Explanation

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