G9 EOY Review Questions

An element is a pure substance that

• Can be enlarged

• Cannot form a molecule

• Can be broken down much further

• Cannot be broken down any further

Answer explanation

An element is a pure substance that cannot be broken down any further, making it the correct choice among the given options.

How many different types of atoms are there in a compound?

• Only one

• Only two

• At least two

• Must be two or more

Answer explanation

In a compound, there must be at least two different types of atoms present to form a chemical compound, making the correct answer choice 'At least two'.

Tags

NGSS.MS-PS1-1

All molecules are compounds?

• True

• False

Answer explanation

Not all molecules are compounds because a molecule can be a single element, while a compound is made up of two or more different elements.

Organize these options into the right categories

Groups:

(a) Compound

,

(b) Element

• 
• 
• Argon

• NaCl

• Helium

• Copper

• 
• Lead

Tags

NGSS.MS-PS1-1

Reorder the following for how you think energy would be converted based on a battery operated flashlight.

• Light Energy

• Electrical Energy

• Heat Energy

• Chemical Energy

Organize these options into the right categories (Good and Bad Conductors)

Groups:

(a) Good Conductors

,

(b) Bad Conductors

• Steel

• Iron

• Wood

• Glass

• Plastic

• Lead

Which is which? Parallel and Series Circuit?

b

a

In series Circuit

Parallel Circuit

Momentum is the ​ (a)   of mass and velocity.

• product

• quotient

• sum

Answer explanation

Momentum is the product of mass and velocity, making 'product' the correct choice.

Tags

NGSS.MS-PS3-1

What is the voltage produced by an 80 Ohm, 3 Amp device. REMEMBER Ohm's Law

V=IR

• 0.0375 V

• 26.67 V

• 83 V

• 240 V

Answer explanation

Using Ohm's Law (V=IR), voltage (V) = resistance (R) * current (I), so V = 80 Ohm * 3 Amp = 240 V. Therefore, the correct answer is 240 V.

Label the Lever in the picture provided. Place the class of Lever at the top.

c

d

e

f

Fulcrum

2nd class

Effort

1st Class

Load

3rd Class