8th Grade Science Review 3rd 6 Weeks

According to Newton’s Law of Inertia, an object that is moving will change its motion only if what kinds of forces act on it?

• Constant forces
• Unbalanced forces
• Unbalanced forcesStrong forces
• Gravitational forces

Tags

NGSS.MS-PS2-2

Looking at the image, it is (a)   .

• Unbalanced
• Balanced

How will this object move?

• It will not move

• It will move in both directions

• It will move to the right

• It will move to the left

Answer explanation

When two forces act on an object in opposite directions, their forces are subtracted from each other.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the net force?

(a)  

• 5 N left
• 30 N left
• 25 N right
• 55 N right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

I have cell walls
I am an autotroph
I am multicellular
What am I?

• Plant
• Animal
• Eubacteria
• Unicorn

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

I am unicellular
I am prokaryotic
I am found in extreme ecosystems
What kingdom do I belong to?

• The Candy Kingdom
• Kingdom Plantae
• Kingdom Animalia
• Kingdom Archaebacteria

What structure in a plant cell enables the cell to capture energy from the Sun?

• cell wall

• chloroplast

• mitochondrion

• central vacuole

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-6

The __________ is the control center of a cell.

• mitochondrion

• nucleus

• vacuole

Tags

NGSS.MS-LS1-2

The __________ produces energy in the cell.

• mitochondrion

• nucleus

• vacuole

Tags

NGSS.MS-LS1-2

The first plants or organisms to appear during ecological succession are referred to as _______________________.

• Special Species

• Pioneer Species

• Motivating Species

• Trees