When reading the volume of water in a graduated cylinder, you should always

look at the bottom of the meniscus

look at the water level above the meniscus

hold the graduated cylinder in the air to read the meniscus

Convection is occurring in the earth because there is

A temperature difference in the earth

No temperature difference in the earth

What happens to the mass, volume, and density of an object if it is broken into smaller pieces?

the mass and volume of each piece decrease, but the density remains the same

each piece has the same mass and volume, but its density decreases

the mass and volume of each piece decrease, and so does their density

the mass, volume, and density of each piece remain the same

Which of the following best describes what we mean by "evidence" for a scientific theory?

evidence is something you can observe that supports the theory's explanation

evidence is information about the independent variable

evidence is a theory that has already been proven

evidence is any true statement about the subject the theory describes

For most materials, when they are cooled their density

increases because the molecules contract, or move closer together

decreases because the molecules contract, or move closer together

decreases because the molecules expand, or move farther apart

increases because the molecules expand, or move farther apart

When the temperature of something increases, most materials' density

decreases because the molecules expand, or move farther apart

decreases because the molecules contract, or move closer together

increases because the molecules contract, or move closer together

increases because the molecules expand, or move farther apart

This graph shows how the density of our bone tends to change over time. Which of the following best describes the changes in bone density according to this graph?

Bone density increases in childhood but begins to decrease after the age of 45.

Bone density is not predictable for individuals.

Bone density increases steadily until the age of 50, but then begins to decrease.

Bone density decreases as we get older.

According to this graph, what is happening to bone density between the ages of 5 and 15?

These ages are not represented on the graph.

Bone density is staying the same.

Mr. S normally uses praise as a reward to train his dog. He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. What is his independent variable?

Amount of time the dog follows commands

Mr. S normally uses praise as a reward to train his dog. He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. What is his dependent variable?

Amount of time the dog follows commands

Why do we want to test one variable at a time?

To know what is causing the changes

Because it is hard to setup a data table with more

It is what has always been done

Students experiment on wilting. They take 2 plants of the same size. They put one in full sunlight and leave one in the classroom. After 2 hours, the plant in the sun has drooped. Students conclude that sunlight causes wilting. How could this experiment be improved?

Do more trials. Only 1 plant in each spot isn't much repetition.

They should put both plants in the same location.

They should leave the plants in the location for less time so the plant isn't hurt by the sun.

They should make sure to water both plants first.

How are scientific theories different from scientific laws?

Scientific theories are well-supported ideas that can be modified, but are rarely discarded.

Scientific theories are laws that have not been proven yet.

Scientific theories are claims that a few scientists believe.

Scientific theories are educated guesses.

Sarah conducted an experiment to determine whether salt added to a cup of water affects its boiling point. Water samples were prepared containing equal quantities of water at the same temperature. Each sample received a different amount of salt and was placed onto a heat source. The temperature of the water once it reached a rapid boil was recorded. Which conclusion correctly interprets the information from Sarah's table?

Increasing the amount of salt increased the boiling point.

Doubling the amount of salt doubled the boiling point.

Increasing the amount of salt lowered the boiling point.

Doubling the amount of salt decreased the boiling point.

Two students are going to run a mile and measure their heart rate before and after their run. Student A is very athletic and is a part of the school's undefeated track team. Student B enjoys going home after school to play video games all night and is not physically fit. According to the data from the chart, how does a person's physical fitness change the way the circulatory system responds to exercise?

The more physically fit a person is, the less the heart rate will increase after exercise.

After running, the heart rate will increase by about 60 beats per minute.

After running the heart rate will increase by about 80 beats per minute.

The more physically fit a person is, the more the heart rate will increase after exercise.

Two students are debating whether playing video games increases a person's reaction time. To test this they decide to perform an experiment. One student spends an hour playing an intense video game while the other student watches. Afterward, they test their reaction times by seeing how quickly they can catch a ruler as it falls between their fingers. Based on the data they collected, what conclusion can be drawn about reaction times?

more trials should be conducted to be able to draw an accurate conclusion

playing video games increases reaction times

playing video games decreases reaction times

Test Review for Unit 1: Thinking Scientifically

Authored by Michael Avery

Other Sciences

9th Grade

CCSS covered

Used 14+ times

Test Review for Unit 1: Thinking Scientifically

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50 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Density can be calculated, but cannot be measured directly. This is because it expresses a relationship between two variables that can be measured. What relationship does density describe?

relationship between the control and constant

relationship between the independent variable and the dependent variable

relationship between mass and volume

relationship between the state of matter and volume

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What property do these tools measure?

volume

mass

length

temperature

An object that floats in water is _____________

Less dense than water

More dense than water

Same density as water

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Put the liquids in order from most dense to least dense.

4, 3, 2, 1

1, 2, 3, 4

3, 4, 2, 1,

4, 3, 1, 2

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Find the volume of this piece of brass.

50 g

10 cm

6 cm³

12 cm³

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The density of this material is 2 g/cm³.
There are 24 cm³ Find the total mass.

12 grams

48 grams

12 g/cm³

48 g/cm³

What is the volume of the fish?

18.0 cm³

6.0 cm³

38.0 cm³

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Test Review for Unit 1: Thinking Scientifically