Savvas 7th Grade Chapter 2 Review

Last updated almost 3 years ago

40 questions

1

Library

Savvas 7th Grade Chapter 2 Review

Last updated almost 3 years ago

40 questions

1

Scientists often rely on a(n)_______   when they cannot obtain an exact
number.

1

When you multiply measurements, the answer should only have the
same number of significant figures as the measurement with the _______  significant
figures.

1

A reliable measurement is both _______ and precise.

1

Calculating percent error and checking the reasonableness of data are two of the
math tools scientists use to analyze_______ .

1

_______ data are data that do not fit with the rest of a data set.

1

The significant figures in a measurement include all digits measured exactly, plus one 
_______ digit.

1

All systems have input, _______  , and output.

1

_______ is the material or energy that goes into a system.

1

A(n)_______ is a group of parts that work together to perform a function or produce a result

1

Output that changes a system in some way is called_______ .

1

You should keep your lab work area clean and _______ 

1

Doing good _______   ahead of time helps you stay safe during science investigations.

1

When an accident occurs, the first person you should tell is your _______.

1

Be sure to wash your _______  thoroughly after working in the laboratory.

1

Wear safety_______  to protect your eyes from chemical splashes.

Weight is a measure of how much mass is contained in a given volume.

True

False

On the Kelvin scale, water freezes at 0°C and boils at 100°C.

True

False

An object will float if it is less dense than the surrounding liquid.

True

False

The balance is the tool used to measure mass.

True

False

The basic unit for measuring volume is the kilogram.

True

False

Scientists control changes in the responding variable.

True

False

To help you see what the data from an experiment mean, you could use a(n) graph.

True

False

Line graphs display data that show how the responding variable changes in response to the manipulated variable.

True

False

A point that does not fall exactly on a graph line is a(n) anomalous data point.

True

False

Some systems have feedback.

True

False

Scientists use models to understand things they can observe directly.

True

False

When they use models, scientists keep in mind that predictions based on models are certain.

True

False

What happens in a system is called input.

True

False

What would you be most likely to measure by immersing an object in water and seeing how much the water level rises?

the mass of a rectangular solid

the volume of a rectangular solid

the mass of an irregular solid

the volume of an irregular solid

Which is a common unit of density?

g

g/ml

cm 3

g/s

On what number is the metric system based?

0

1

10

100

A low percent error indicates that the result you obtained is:

accurate

inaccurate

an estimate

anomalous

Which term refers to how close a group of measurements are to each other?

estimate

percent error

accuracy

precision

Which of the following is the middle number in a set of data?

mean

median 

mode

range

If you add up the values in a data set and then divide the sum by the total number of values, the result will be the

mean

median

mode

range

On which of the following graphs do data points yield a straight line?

non-linear

bar

linear

circle

When a graph does NOT have any clear trends, it probably means that the variables are which of the following?

responded

manipulated

related

not-related

On a nonlinear graph, the data points are never which of the following?

along a curved line

along a straight line

exactly on a graph line 

part of a trend 

Where do you conduct a science investigation in the field?

in the science laboratory 

outside the science laboratory

both a and b

neither a nor b

When doing a science investigation, what should be your chief concern?

your own safety

your classmate's safety

both a and b

neither a nor b

Scientists often rely on a(n)_______   when they cannot obtain an exact
number.

When you multiply measurements, the answer should only have the
same number of significant figures as the measurement with the _______  significant
figures.

A reliable measurement is both _______ and precise.

Calculating percent error and checking the reasonableness of data are two of the
math tools scientists use to analyze_______ .

_______ data are data that do not fit with the rest of a data set.

The significant figures in a measurement include all digits measured exactly, plus one 
_______ digit.

All systems have input, _______  , and output.

_______ is the material or energy that goes into a system.

A(n)_______ is a group of parts that work together to perform a function or produce a result

Output that changes a system in some way is called_______ .

You should keep your lab work area clean and _______ 

Doing good _______   ahead of time helps you stay safe during science investigations.

When an accident occurs, the first person you should tell is your _______.

Be sure to wash your _______  thoroughly after working in the laboratory.

Wear safety_______  to protect your eyes from chemical splashes.

Weight is a measure of how much mass is contained in a given volume.

True

False

On the Kelvin scale, water freezes at 0°C and boils at 100°C.

True

False

An object will float if it is less dense than the surrounding liquid.

True

False

The balance is the tool used to measure mass.

True

False

The basic unit for measuring volume is the kilogram.

True

False

Scientists control changes in the responding variable.

True

False

To help you see what the data from an experiment mean, you could use a(n) graph.

True

False

Line graphs display data that show how the responding variable changes in response to the manipulated variable.

True

False

A point that does not fall exactly on a graph line is a(n) anomalous data point.

True

False

Some systems have feedback.

True

False

Scientists use models to understand things they can observe directly.

True

False

When they use models, scientists keep in mind that predictions based on models are certain.

True

False

What happens in a system is called input.

True

False

What would you be most likely to measure by immersing an object in water and seeing how much the water level rises?

the mass of a rectangular solid

the volume of a rectangular solid

the mass of an irregular solid

the volume of an irregular solid

Which is a common unit of density?

g

g/ml

cm 3

g/s

On what number is the metric system based?

0

1

10

100

A low percent error indicates that the result you obtained is:

accurate

inaccurate

an estimate

anomalous

Which term refers to how close a group of measurements are to each other?

estimate

percent error

accuracy

precision

Which of the following is the middle number in a set of data?

mean

median 

mode

range

If you add up the values in a data set and then divide the sum by the total number of values, the result will be the

mean

median

mode

range

On which of the following graphs do data points yield a straight line?

non-linear

bar

linear

circle

When a graph does NOT have any clear trends, it probably means that the variables are which of the following?

responded

manipulated

related

not-related

On a nonlinear graph, the data points are never which of the following?

along a curved line

along a straight line

exactly on a graph line 

part of a trend 

Where do you conduct a science investigation in the field?

in the science laboratory 

outside the science laboratory

both a and b

neither a nor b

When doing a science investigation, what should be your chief concern?

your own safety

your classmate's safety

both a and b

neither a nor b