8th Grade Science Review 20-21

1. UP and DOWN columns on the periodic table are

• groups

• periods

Which elements have properties in common?

• elements in a group

• elements in a period

Which elements have 1 valence electron?

• period 1

• group 1

• group 4

What does the number of proton tell us?

• electrons

• atomic mass

• atomic number

• neutrons

What group and period does this element belong in?

• period 1 and group 3

• period 3 and group 1

• period 3 and group 2

• period 2 and group 3

Tags

NGSS.MS-PS1-1

How many protons and electrons does nickel have?

• 28

• 59

• 58

Tags

NGSS.MS-PS1-1

According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will

• remain in motion

• eventually come to a stop

• accelerate

• change its momentum

If you exert a net force of 8 N on a 2-kg object, what will its acceleration be?

Hint: F=m*a

• 10 m/s²

• 16 m/s²

• 2 m/s²

• 4 m/s²

Tags

NGSS.MS-PS2-2

When the net force is zero, the forces on an object are balanced. True or false.

• True

• False

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

Calculate net force

• 45 N

• 55 N

• 5 N

Tags

NGSS.MS-PS2-2