Chemical Reactions and Their Effects

Chemical Reactions and Their Effects

Assessment

Interactive Video

Chemistry

6th - 8th Grade

Hard

Created by

Patricia Brown

FREE Resource

Anbesha, a grade 6 student, presents on how our world changes due to various factors like heat, light, mixing, and electricity. She explains how these factors cause physical and chemical changes in substances, using examples like photosynthesis, electromagnets, and chemical reactions. The presentation highlights both useful and harmful chemical reactions, emphasizing the impact of these changes on our environment.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the main factors causing changes on Earth as mentioned in the introduction?

Sound, vibration, pressure, and density

Gravity, magnetism, friction, and tension

Water, air, soil, and fire

Heat, light, mixing, and electricity

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to a substance when it is heated, according to the section on heat?

It remains unchanged

It evaporates

It expands

It contracts

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a combination reaction?

Ice melting into water

Salt dissolving in water

Water splitting into hydrogen and oxygen

H2 and O2 forming H2O

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does light affect silver bromide in the context of changes caused by light?

It decomposes it into silver

It turns it into gold

It melts it

It evaporates it

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What role does light play in photosynthesis?

It is absorbed as light energy

It acts as a catalyst

It is not required

It provides heat energy

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when sulfuric acid is mixed with sugar?

The sugar dissolves completely

A black substance is formed

A white substance is formed

No new substance is formed

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a mixture where no new substance is formed?

Copper and zinc

Iron and sulfur

Sugar and water

Sulfuric acid and sugar

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