Science

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Conservation of mass

Describe what is meant by 'conservation of mass' and apply this to chemical and physical changes.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which state of matter is often invisible?

1/6

Q2.What is the total mass of 150 g chocolate, 50 g butter and 150 g of sugar?

2/6

Q3.What is the mass of an object?

3/6

Q4.What state is oxygen at room temperature?

4/6

Q5.At room temperature, the elements in Group 2 of the periodic table are all...

5/6

Q6.A 5 g ice cube melts into liquid. What is the mass of the liquid?

6/6

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which state of matter is often invisible?

1/6

Q2.What is the total mass of 150 g chocolate, 50 g butter and 150 g of sugar?

2/6

Q3.What is the mass of an object?

3/6

Q4.What state is oxygen at room temperature?

4/6

Q5.At room temperature, the elements in Group 2 of the periodic table are all...

5/6

Q6.A 5 g ice cube melts into liquid. What is the mass of the liquid?

6/6

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Conservation of mass

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Which reaction would appear to increase in mass?

1/6

Q2.The increase in mass as magnesium burns can be investigated experimentally. Match the apparatus to its use.
  • balance
  • crucible
  • bunsen burner
  • tripod
  • clay triangle
  • for burning the magnesium
  • measuring masses
  • for holding the crucible above the heat
  • container for burning magnesium
  • for holding the clay triangle above the heat

Where you see this icon you can drag and drop! If you are using your keyboard select and move using space and the arrow keys.

2/6

Q3.The mass of the reactants is always equal to the mass of the .

Fill in the blank.

3/6

Q4.A 5 g ice cube is placed in a sealed tube and heated. The ice cube turns into steam. What is the mass of the steam?

4/6

Q5.During a chemical reaction, atoms are ...

5/6

Q6.10 g of lithium was reacted with 100 g of hydrochloric acid. What is the total mass of the products formed?

6/6

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Conservation of mass

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Which reaction would appear to increase in mass?

1/6

Q2.The increase in mass as magnesium burns can be investigated experimentally. Match the apparatus to its use.
  • balance
  • crucible
  • bunsen burner
  • tripod
  • clay triangle
  • container for burning magnesium
  • for burning the magnesium
  • measuring masses
  • for holding the crucible above the heat
  • for holding the clay triangle above the heat

Where you see this icon you can drag and drop! If you are using your keyboard select and move using space and the arrow keys.

2/6

Q3.The mass of the reactants is always equal to the mass of the .

Fill in the blank.

3/6

Q4.A 5 g ice cube is placed in a sealed tube and heated. The ice cube turns into steam. What is the mass of the steam?

4/6

Q5.During a chemical reaction, atoms are ...

5/6

Q6.10 g of lithium was reacted with 100 g of hydrochloric acid. What is the total mass of the products formed?

6/6

Lesson summary: Conservation of mass

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Time to move!

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Chair yoga

The next lesson in:
Atoms and the periodic table
is:
Development of the Periodic Table

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