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Preparation EASE 3 Grade 7

Authored by Sri Iswatiningrum

Chemistry

7th - 8th Grade

Used 2+ times

Preparation EASE 3 Grade 7
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30 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which word below matches with the molecule description?

A substance made of more than one kind of atom bonded together.

The tiniest particle of an element that can exist.

A substance made up of only one type of atom.

A group of atoms bonded tightly together.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How did Robert Brown know his first explanation about the random movement of particles was wrong?

He thought the movement was because the pollen grains were alive.

The water particles are moving randomly, so they can hit the pollen grains from any side at any time.

Robert Brown saw pollen grains floating on water with a microscope. They jiggled about with no pattern.

He saw the same type of movement when he looked at flecks of dust in the water, but he knew the dust was not alive.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the element which does not belong to the same group.

Lithium

Sodium

Potassium

Calcium

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In steam, the distance between the molecules is __________ distance between the molecules in liquid water.

Please fill in the blank with the correct answer!

smaller than

the same as

larger than

not change

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following list of elements are all metals?

Potassium, calcium, sulfur, argon.

Lithium, silicon, aluminum, carbon.

Chlorine, calcium, sodium, neon.

Sodium, aluminum, beryllium, magnesium.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the most common non-metal found in the Earth’s crust?

silicon

nitrogen

oxygen

hydrogen

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement is the true definition of a compound?

Compounds are the simplest forms of an element.

Compounds are chemicals that have been melted together.

A compound is two or more elements chemically combined together.

A compound is a complicated mixture of chemicals.

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