8th Grade- Chapter 2 Test-Math and Models in Science

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The closeness of a measurement to its true value is it's

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If you add a mass of 3.7 g to a mass of 9.495 g, the sum with the correct number of significant digits is:

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A line graph shows:

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In a home central heating system, when the room temperature measured by the thermostat reaches a set value, the thermostat switches off the heater. This action by the thermostat is an example of:

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Which of the following would you use to measure the weight of an orange?

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For which of the following would the millimeter be the most appropriate unit of measure?

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Which of the following would be considered a good model of Earth?

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Why are line graphs said to be powerful tools?

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After you have completed a lab investigation you should do all of the following except:

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What units would you use to measure the volume of a small cardboard box?

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

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The official SI unit for temperature is the_______.

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You should make sure you know the _______and use of safety equipment in the lab.

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An estimate is not a guess because an estimate is based on_______.

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_______are data points that do not fit with the rest of a data set.

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The basic SI unit of mass is the_______.

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A good technique for finding the volume of an irregular solid is _______.

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 A(n) _______ is a visual representation, or a picture, of data.

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To calculate the density of an object, you multiply mass by volume.

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To find percent error, you subtract the true value from the experimental value and divide by the true value.

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You should always work with an adult when doing field work.

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If an accident occurs, you should immediately notify the fire department.

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If you measure the mass of an object four times and get values that are very close to each other, the measurements are said to be accurate.

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If you don’t understand a part of a lab investigation, you should ask your teacher.

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Scientists use models to understand things they can observe directly.

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A student calculated the density of tin to be 7.20 g/mL. The actual density of tin is 7.29 g/mL. Which of the following is his percent error?

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Density determines whether an object will float or sink in water.

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A system is a group of parts that work together to carry out a function.

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

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Safety symbols are pictures that alert you to possible sources of accidents in an investigation.

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Name the 3 parts of any system. For an extra point, name the 4 part that sometimes occurs

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Give me an example of a system that you may use in your daily life.

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What is SI? Why do scientists use SI?

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Tell me how mass and weight are alike and how they are different.

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Directions: Use the figure to answer the question. Brown Pelican Nesting Colonies on Cat Island
Cat Island Plots Number of Pelican Nests
A 142
B 166
C 142
D 132
E 188

What is the mean of the number of pelican nests per plot on Cat Island?

1

The closeness of a measurement to its true value is it's

If you add a mass of 3.7 g to a mass of 9.495 g, the sum with the correct number of significant digits is:

A line graph shows:

In a home central heating system, when the room temperature measured by the thermostat reaches a set value, the thermostat switches off the heater. This action by the thermostat is an example of:

Which of the following would you use to measure the weight of an orange?

For which of the following would the millimeter be the most appropriate unit of measure?

Which of the following would be considered a good model of Earth?

Why are line graphs said to be powerful tools?

After you have completed a lab investigation you should do all of the following except:

What units would you use to measure the volume of a small cardboard box?

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

To calculate the density of an object, you multiply mass by volume.

To find percent error, you subtract the true value from the experimental value and divide by the true value.

You should always work with an adult when doing field work.

If an accident occurs, you should immediately notify the fire department.

If you measure the mass of an object four times and get values that are very close to each other, the measurements are said to be accurate.

If you don’t understand a part of a lab investigation, you should ask your teacher.

Scientists use models to understand things they can observe directly.

A student calculated the density of tin to be 7.20 g/mL. The actual density of tin is 7.29 g/mL. Which of the following is his percent error?

Density determines whether an object will float or sink in water.

A system is a group of parts that work together to carry out a function.

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

Safety symbols are pictures that alert you to possible sources of accidents in an investigation.

Name the 3 parts of any system. For an extra point, name the 4 part that sometimes occurs

Give me an example of a system that you may use in your daily life.

What is SI? Why do scientists use SI?

Tell me how mass and weight are alike and how they are different.

Directions: Use the figure to answer the question. Brown Pelican Nesting Colonies on Cat IslandCat Island Plots Number of Pelican Nests A 142 B 166 C 142 D 132 E 188What is the mean of the number of pelican nests per plot on Cat Island?

Using the pelican table from above what is the mode from the data?

Directions: Use the figure to answer the question. Brown Pelican Nesting Colonies on Cat Island
Cat Island Plots Number of Pelican Nests
A 142
B 166
C 142
D 132
E 188

What is the mean of the number of pelican nests per plot on Cat Island?