Chemical Reactions -Revision

Presentation

•

Science

•

7th - 9th Grade

•

Medium

•

NGSS

MS-PS1-2, MS-PS1-4, MS-PS1-5

Standards-aligned

Sammia Bano

Used 8+ times

FREE Resource

7 Slides • 38 Questions

Chemical Reactions -Revision

Read through the slides and answer the questions

Multiple Choice

The graph above is from which type of reaction?

Endothermic reaction

Exothermic reaction

Multiple Choice

What type of reaction is this?

Exothermic

Endothermic

Energy Producing

No way to tell

Multiple Choice

Which type of reaction does the image show?

Exothermic

Endothermic

Multiple Choice

Which type of reaction does the image show?

Exothermic

Endothermic

Multiple Choice

After you mix two substances together, a new substance forms. This is an example of:

Physical Change

Chemical Change

Multiple Choice

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

The temperature changed

It is an endothermic reaction

It is an exothermic reaction

Two of the answers are correct

Multiple Choice

Sugar dissolves in water. This is an example of....

Physical Change

Chemical Change

Multiple Choice

When you freeze water, it turns to ice. What kind of change is this?

Physical

Chemical

Multiple Choice

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

It is an exothermic reaction

It is an endothermic reaction

It is made of ice

It is dissolving your mouth

Multiple Choice

Is photosynthesis an exothermic or endothermic reaction?

Endothermic

Exothermic

Neither

Multiple Choice

What type of reaction occurs in a hand warmer

exothermic

endothermic

Multiple Choice

In an endothermic reaction, heat is ...

taken in or absorbed

given out or released

Complete Combustion

Complete Combustion uses lots of oxygen. Complete combustion is when a fuel burns to make carbon dioxide and water. This can be summarised as:

methane+ oxygen ➡️. carbon dioxide + water

Combustion is an exothermic reaction.

Multiple Choice

What is essential for a combustion reaction to begin?

Carbon dioxide

Fuel

Fuel, oxygen and heat

Water and oxygen

Multiple Choice

What does this hazard symbol warn of?

The substance is explosive

The substance burns easily

The substance supplies oxygen to fires

The substance puts out fires

Multiple Choice

Combustion is a

Natural process

Chemical process

Physical process

None of these processes

Multiple Choice

Combustion is a reaction in which a substance reacts with

hydrogen

Nitrogen

Oxygen

Chlorine

Multiple Choice

What are the products of combustion?

Hydrogen + oxygen

Carbon dioxide + water

Carbon dioxide + hydrogen

Carbon + water

Multiple Choice

What do we use limewater to test for?

Carbon Dioxide

Water

Heat

Smoke

Multiple Choice

Which is the hottest part in the candle flame?

Yellow

Wax part

Black

Blue

Multiple Select

Which of these are true about combustion

It is a physical process

It has an exothermic reaction

Combustion does not always result in fire

If combustion results as fire it does not create smoke

Multiple Choice

Propane is burned with a blue flame

propane + oxygen --> carbon dioxide + water

propane + carbon dioxide --> oxygen + water

propane + oxygen --> carbon monoxide + water

Incomplete Combustion

This takes place when there is not enough oxygen present for burning
carbon monoxide, carbon and water

Multiple Choice

Burning of charcoal in a closed room will produce

Carbon dioxide

Nitrogen dioxide

Carbon monoxide

Sulphur dioxide

Multiple Choice

This burning of methane resulted in the formation of soot

methane + carbon monoxide --> oxygen + carbon + water

methane + oxygen --> carbon dioxide + carbon + water

methane + oxygen --> carbon monoxide + carbon + water

Multiple Choice

This type of combustion occurs when there is a limited supply of oxygen

Complete Combustion

Incomplete Combustion

Multiple Choice

If a flame is giving off smoke, this type of combustion is occurring...

Complete combustion

Incomplete combustion

Multiple Choice

What is NOT product of complete combustion?

carbon dioxide

water

carbon monoxide

water

Multiple Choice

What are the types of combustion?

Complete and incomplete

Incomplete and inexact

Impossible and possible

Computer and incomplete

Multiple Choice

What does incomplete combustion produce that complete combustion doesn't?

Carbon Monoxide

Water

Heat

Carbon Dioxide

Multiple Choice

Why do we burn a fuel?

To have fun

To release energy

To lose energy

To produce carbon dioxide

Oxidation

This is a chemical reaction where oxygen is added to a substance
When oxidation takes place an oxide is made
An example of an oxidation reaction is when magnesium burns. A new product is made called magnesium oxide.

Oxidation

So after watching the video the reaction between magnesium and oxygen can be summarised in a word equation:-

Magnesium + oxygen ➡️ Magnesium oxide

Mg + O₂➡️ 2MgO

The reaction is exothermic. A lot of thermal energy was transferred to the surroundings which caused the deflagrating spoon and the glass flask to break.

The reactants of this equation are magnesium and oxygen.

The product is always found on the right hand side of the arrow. Magnesium oxide is the product.

Fill in the Blanks

On which side of the arrow are reactants found?

Type answer...

Fill in the Blanks

name the metal which has this symbol:-

Type answer...

Open Ended

What is an exothermic reaction?

Type response here

Multiple Select

In an exothermic reaction energy is released to the surroundings?

True

False

Open Ended

What happens to magnesium when it is heated in air?

Type response here

Multiple Choice

What is the name of the reaction between magnesium and oxygen

thermal decomposition

endothermic

exothermic

physical reaction

Multiple Choice

Name the gas which is needed for burning?

carbon dioxide

helium

nitrogen

oxygen

Multiple Choice

What is the product called when magnesium burns?

magnesium

magnesium oxide

magnesium carbide

magnesium dioxide

Multiple Choice

Complete the word equation:-

.............. + oxygen ➡️. magnesium oxide

sulphur

iron

copper

magnesium

Chemical Reactions -Revision

Read through the slides and answer the questions

Show answer

Auto Play

Slide 1 / 45

SLIDE

Similar Resources on Wayground

38 questions

Combustion , flame and fuels -2

Presentation

•

6th - 9th Grade

35 questions

Endothermic and Exothermic

Presentation

•

6th - 8th Grade

38 questions

Life Cycle of a Star

Presentation

•

8th Grade

42 questions

1-Chemistry Basics Lesson

Presentation

•

8th Grade

41 questions

Self paced: Chemical reactions Part 1

Presentation

•

7th - 9th Grade

44 questions

Biogeochemical Cycles

Presentation

•

8th - 10th Grade

39 questions

Study for the SOL 2023

Presentation

•

8th Grade

42 questions

Full Lesson - Form Analysis & Parts of EQ

Presentation

•

7th - 9th Grade

Popular Resources on Wayground

10 questions

Safety Day 2026 – Student Review

Quiz

•

9th Grade

21 questions

Continents and Oceans

Quiz

•

6th Grade

20 questions

Parts of Speech

Quiz

•

5th Grade

16 questions

Subject & Predicate

Quiz

•

5th Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

12 questions

Map Skills

Quiz

•

3rd Grade

22 questions

Continents and Oceans

Quiz

•

5th Grade

15 questions

Rounding Decimals

Quiz

•

5th Grade

Discover more resources for Science

20 questions

Newton's Laws of Motion

Quiz

•

8th Grade

15 questions

potential and kinetic energy

Quiz

•

8th Grade

21 questions

Newton's Laws of Motion

Quiz

•

8th Grade

20 questions

Elements, Compounds and Mixtures

Quiz

•

8th Grade

10 questions

Exploring Chemical and Physical Changes

Interactive video

•

6th - 10th Grade

20 questions

Physical vs Chemical Changes

Quiz

•

8th Grade

20 questions

Atomic Structure

Quiz

•

9th Grade

14 questions

Week 1 Falcon Flex Fast and Curious

Quiz

•

7th Grade