What happens when something burns?

A chemical reaction takes place

When a fuel burns, its chemical energy is converted into which types of energy?

Light, sound, and thermal energy

Potential and gravitational energy

What happens to the energy produced when fuel burns?

It spreads out into the surroundings

Which of the following statements is true about burning?

It releases different types of energy into the surroundings

It only produces thermal energy

It does not involve a reaction with oxygen

What is an exothermic reaction ?

A reaction that releases energy

A reaction that does not involve energy changes

A reaction that only occurs in living organisms

What is an endothermic reaction?

A reaction that does not require energy

A reaction that happens without temperature change

Which of the following is an example of an endothermic reaction?

Mixing chemicals in an ice pack

Why do endothermic reactions require energy from the surroundings?

Because the reactants have less energy than the products

Because the products have less energy than the reactants

Because energy is always released in all chemical reactions

Because they do not involve temperature changes

What forms of energy are produced during the combustion of hydrogen?

Kinetic, thermal, sound, and light energy

What happens when magnesium burns in air?

It forms magnesium oxide and releases energy

It absorbs energy from the surroundings

What is an oxidation reaction ?

A reaction where a substance combines with oxygen

A reaction where oxygen is removed from a substance

A reaction that produces only heat

A reaction that stops when oxygen is added

Why are burning reactions considered exothermic?

They release energy in the form of heat and light

They absorb energy from the surroundings

They do not involve any energy changes

What happens to water molecules during the reaction with potassium?

The bonds between hydrogen and oxygen break

They combine to form larger molecules

They turn into solid potassium hydroxide

What are the products of the reaction between potassium and water? ___________ and __________

potassium hydroxide and hydrogen

What happens to the atoms after the water molecules break apart?

They rearrange to form new substances

They return to their original state

They combine to form more water

What type of energy transformation occurs in this reaction?

Stored chemical energy to thermal energy

Kinetic energy to electrical energy

Light energy to chemical energy

Magnetic energy to sound energy

What happens to the thermal energy produced in the reaction?

It dissipates into the environment

It gets stored inside potassium hydroxide

It turns into electrical energy

It remains within the hydrogen gas

8.1 Exothermic Reaction Lesson Slides: 17 Slides (Grade 7)

64 questions

Show all answers

1.

SLIDE QUESTION

30 sec • Ungraded

2.

SLIDE QUESTION

30 sec • Ungraded

3.

SLIDE QUESTION

30 sec • Ungraded

4.

SLIDE QUESTION

30 sec • Ungraded

5.

FILL IN THE BLANKS QUESTION

1 min • 2 pts

Name the reactant of this chemical reaction.

(a)

6.

FILL IN THE BLANKS QUESTION

1 min • 1 pt

Name the product of this chemical reaction.

(a)

7.

FILL IN THE BLANKS QUESTION

1 min • 1 pt

How many atoms make up particle of carbon dioxide?

(a)

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8.1 Exothermic Reaction

64 questions

Name the reactant of this chemical reaction.

(a)

Name the product of this chemical reaction.

(a)

How many atoms make up particle of carbon dioxide?

(a)

How many carbon atoms there are in the product of carbon dioxide?

(a)

How many oxygen atoms there are in the product of carbon dioxide?

(a)

How do you know that burning releases energy to the environment?

(a)

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

8.1 Exothermic Reaction

64 questions

Name the reactant of this chemical reaction. (a)

Name the product of this chemical reaction. (a)

How many atoms make up particle of carbon dioxide? (a)

How many carbon atoms there are in the product of carbon dioxide? (a)

How many oxygen atoms there are in the product of carbon dioxide? (a)

How do you know that burning releases energy to the environment? (a)

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

Name the reactant of this chemical reaction.

(a)

Name the product of this chemical reaction.

(a)

How many atoms make up particle of carbon dioxide?

(a)

How many carbon atoms there are in the product of carbon dioxide?

(a)

How many oxygen atoms there are in the product of carbon dioxide?

(a)

How do you know that burning releases energy to the environment?

(a)