Basic Science Concepts for Grade 9

Basic Science Concepts for Grade 9

9th Grade

16 Qs

quiz-placeholder

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Basic Science Concepts for Grade 9

Basic Science Concepts for Grade 9

Assessment

Quiz

Others

9th Grade

Practice Problem

Hard

Created by

Oluwagbemisola Oriowojide

Used 1+ times

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16 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the basic unit of matter?

cell

electron

molecule

atom

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who proposed the atomic theory?

Erwin Schrödinger

Niels Bohr

Albert Einstein

John Dalton

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the charge of a proton?

+2 elementary charge

-1 elementary charge

+1 elementary charge

0 elementary charge

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for calculating the number of neutrons in an atom?

Neutrons = Mass Number - Atomic Number

Neutrons = Mass Number * Atomic Number

Neutrons = Atomic Number - Mass Number

Neutrons = Atomic Number + Mass Number

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the chemical formula H2O represent?

Hydrogen Peroxide

Carbon Dioxide

Water

Ozone

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you balance the equation: H2 + O2 → H2O?

2 H2 + O2 → 2 H2O

H2 + O2 → H2O

H2 + 2 O2 → H2O

2 H2 + 2 O2 → 2 H2O

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of a chemical symbol?

To represent elements in a standardized way.

To represent the color of an element.

To indicate the atomic mass of an element.

To show the chemical reactions of compounds.

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