Science 8 Final Exam

Last updated 12 months ago

40 questions

1

2

1

Library

Science 8 Final Exam

Last updated 12 months ago

40 questions

1

2

In your own words, define a mixture. Then, give an example of one.

1

Based on your knowledge of science and first hand experiences, what separation technique would be used to separate a mixture of sand and water?

1

Density is a physical property of matter and describes the relationship between the mass and volume of matter. What is the mathematical representation of density?

1

What charge does an electron have?

1

Image showing the element box of Hydrogen with the symbol H and with an atomic number of 1 in the top left corner.

1

2

Construct an explanation to describe the relationship between atoms and molecules.

Image comparing the atomic structure of diamond versus graphite.

1

In terms of atoms, why do graphite and diamond have different properties even though they are both made up of the element carbon? Support with evidence.

1

Image showing a chemical reaction occurring in a test tube.

1

What are three pieces of evidence that indicate a chemical reaction has occurred?

1

According to the model, did a chemical reaction occur? Use evidence from the model to justify your claim.

1

According to the graph and your experience in science, how is the kinetic energy of a moving object related to the mass of that object?

1

The steps commonly used by scientists when planning and conducting an investigation are referred to as the _______________.

Scientific method

Scientific theory

Experiment

The first step of any investigation is

Sharing results

Gathering and analyzing data

Making observations

To communicate trends in data, the data should be presented in a(an) __________.

Conclusion

Graph

Hypothesis

Volume is defined as the amount of _____________ an object takes up.

Distance

Space

Temperature

When experimenting, the value of the dependent variable depends on the ____________________ .

Constant

Independent

Standard

_____________ have no definite shape, but definite volume.

Solids

Liquids

Gases

_____________ have a definite shape and definite volume.

Solids

Liquids

Gases

____________ take the shape and volume of any container.

Solids

Liquids

Gases

Which phase of matter has the most kinetic energy.

Solids

Liquids

Gases

As an ice cube melts (goes from solid to liquid), what happens to the particles?

They speed up.

They slow down.

Their motion and size stays the same.

They increase in size.

Temperature can be defined as

Heat

Average kinetic energy of particles 

Exothermic change 

In your own words, define a mixture. Then, give an example of one.

1

Based on your knowledge of science and first hand experiences, what separation technique would be used to separate a mixture of sand and water?

1

Density is a physical property of matter and describes the relationship between the mass and volume of matter. What is the mathematical representation of density?

1

What charge does an electron have?

This table organizes the elements based on increasing atomic number.

The Periodic Table of Elements

Bohr models

Flow chart

1

2

Construct an explanation to describe the relationship between atoms and molecules.

1

In terms of atoms, why do graphite and diamond have different properties even though they are both made up of the element carbon? Support with evidence.

1

Which of the following is an example of a chemical reaction

Cooking an egg

Ripping a piece of paper

Making candy salad

Which of the following is an example of a physical change

Burning firewood

Souring of milk

Melting an ice cube

In a physical change ___________________.

Matter changes form but not chemical identity

Matter changes form and chemical identity

Matter is rearranged and new products are formed.

1

What are three pieces of evidence that indicate a chemical reaction has occurred?

1

In terms of thermal energy, explain the difference between an endothermic process and an exothermic process.

1

What type of energy is made available by the flow of ELECTRONS?

Electric

Kinetic

Magnetism

1

According to the graph and your experience in science, how is the kinetic energy of a moving object related to the mass of that object?

As an object increases its height from the ground, the potential energy of that object _______________.

Decreases

Stays the same

Increases 

According to the Law of Conservation of Energy,

Energy can change form

Energy can be created

Energy can be destroyed

Which of the following do all waves transfer?

matter

people

energy

electrons

What is the difference between an electromagnetic wave and a mechanical wave?

Mechanical waves can travel through space

Electromagnetic waves need a medium to travel through

Mechanical waves need a medium to travel through 

The steps commonly used by scientists when planning and conducting an investigation are referred to as the _______________.

Scientific method

Scientific theory

Experiment

The first step of any investigation is

Sharing results

Gathering and analyzing data

Making observations

To communicate trends in data, the data should be presented in a(an) __________.

Conclusion

Graph

Hypothesis

Volume is defined as the amount of _____________ an object takes up.

Distance

Space

Temperature

When experimenting, the value of the dependent variable depends on the ____________________ .

Constant

Independent

Standard

_____________ have no definite shape, but definite volume.

Solids

Liquids

Gases

_____________ have a definite shape and definite volume.

Solids

Liquids

Gases

____________ take the shape and volume of any container.

Solids

Liquids

Gases

Which phase of matter has the most kinetic energy.

Solids

Liquids

Gases

As an ice cube melts (goes from solid to liquid), what happens to the particles? 

They speed up.

They slow down.

Their motion and size stays the same.

They increase in size.

Temperature can be defined as 

Heat

Average kinetic energy of particles 

Exothermic change 

What is the physical property that can be used to identify matter and is responsible for creating these layers in the test tube?

Acidity 

Flammability

Density

What is a positive subatomic particle called?

Proton

Neutron

Electron 

This table organizes the elements based on increasing atomic number.

The Periodic Table of Elements

Bohr models

Flow chart

This number is what gives the element its identity and tells us how many protons there are.

Mass number

Atomic number

Element symbol

Which statement best describes the outcome of a chemical reaction

New substances with different properties are formed

No new substances are formed

Substances with the same properties are formed

Which of the following is an example of a chemical reaction

Cooking an egg

Ripping a piece of paper

Making candy salad

Which of the following is an example of a physical change

Burning firewood

Souring of milk

Melting an ice cube

In a physical change ___________________.

Matter changes form but not chemical identity

Matter changes form and chemical identity

Matter is rearranged and new products are formed.

In terms of thermal energy, explain the difference between an endothermic process and an exothermic process.

In a chemical reaction, mass is conserved. This means that

Matter can be created

Matter can be destroyed

Matter can be rearranged

What would we expect to happen to the overall mass before and after a chemical reaction?

It depends on the reaction.

The mass will stay the same.

The substance will gain mass

If an object starts to accelerate _____________________________________ .

balanced force is acting on it

gravity is acting on it

an unbalanced force is acting on it

What type of energy is made available by the flow of ELECTRONS?

Electric

Kinetic

Magnetism

As an object increases its height from the ground, the potential energy of that object _______________.

Decreases

Stays the same

Increases 

According to the Law of Conservation of Energy, 

Energy can change form

Energy can be created

Energy can be destroyed

Which of the following do all waves transfer?

matter

people

energy

electrons

What is the difference between an electromagnetic wave and a mechanical wave?

Mechanical waves can travel through space

Electromagnetic waves need a medium to travel through

Mechanical waves need a medium to travel through 

What happens to the energy of the waves within the electromagnetic spectrum as you move from radio waves to gamma waves?

energy decreases

energy increases

energy remains the same

What is the relationship between frequency and wavelength?

When frequency increases, wavelength decreases

When frequency decreases, wavelength decreases

Frequency and wavelength never change

What is the relationship between frequency and energy?

It is an inverse relationship; when frequency increases, energy decreases.

It is a direct relationship; when frequency increases, energy increases.

It is an inverse relationship; when frequency increases, energy increases.

It is a direct relationship; when frequency increases, energy decreases.

What is the physical property that can be used to identify matter and is responsible for creating these layers in the test tube? 

Acidity 

Flammability

Density

What is a positive subatomic particle called?

Proton

Neutron

Electron 

This number is what gives the element its identity and tells us how many protons there are.

Mass number

Atomic number

Element symbol

Which statement best describes the outcome of a chemical reaction

New substances with different properties are formed

No new substances are formed

Substances with the same properties are formed

In a chemical reaction, mass is conserved. This means that

Matter can be created

Matter can be destroyed

Matter can be rearranged

What would we expect to happen to the overall mass before and after a chemical reaction?

It depends on the reaction.

The mass will stay the same.

The substance will gain mass

If an object starts to accelerate _____________________________________ .

balanced force is acting on it

gravity is acting on it

an unbalanced force is acting on it

What happens to the energy of the waves within the electromagnetic spectrum as you move from radio waves to gamma waves?

energy decreases

energy increases

energy remains the same

What is the relationship between frequency and wavelength? 

When frequency increases, wavelength decreases

When frequency decreases, wavelength decreases

Frequency and wavelength never change

What is the relationship between frequency and energy? 

It is an inverse relationship; when frequency increases, energy decreases.

It is a direct relationship; when frequency increases, energy increases.

It is an inverse relationship; when frequency increases, energy increases.

It is a direct relationship; when frequency increases, energy decreases.